Required A/C Assist? It's Found In This Short Article

The HVAC system in any home is very important to have it functioning properly. Everyone at some point in their life has had to deal with a faulty energy system, but this should not be a reoccurring problem. If you would like good tips on how to ensure that you HVAC system stays in good working order, then should read the following article.

Ask for referrals when hiring someone to install your HVAC system. Someone may seem like they know what they are doing, but you cannot simply take their word for it. https://plus.google.com/b/110608296190017271458/+CamfilUSAAirFilters/posts/eGr2PCZkpNv should be able to call past customers to get an idea of what to expect from this particular installer.

Clean the condenser on your debris regularly. You can never tell when things will pile up, especially following rain or wind storms. These can wreak havoc on your units. It can get overheated, which will cause problems with the whole system.

When your contractor comes to fix your unit or install a new one, he should walk around your home and investigate what's going on with your current set-up. They should be looking for how much insulation you have, where your windows are and what quality they are and more.

Look to your neighbors and family to get recommendations of good HVAC specialists. Likely there's someone you know who's already done a ton of research. Use this knowledge to help get you the best specialist you can. This can save you many hours of research time and money too.




Filtrete Smart Air Filters add another layer of intelligence to your home HVAC system


Filtrete Smart Air Filters add another layer of intelligence to your home HVAC system NEWS – Smart thermostats have smartened up your home’s HVAC unit, but it was still up to you to know when to replace the filter to ensure your unit is working in top form.  But now, Filtrete has introduced smart filters that can monitor their own performance to let you know when you should change filters to keep the airflow clean and efficient.  Filtrete Smart Air Filters monitor air flow through the filter, the amount of usage, and the changing air pressure, not just time, to tell you the optimal time to replace the filter.



Camfil USA
200 Creekside Dr, Washington, NC 27889, USA
+1 252-975-1141

Research what size air conditioner you should purchase for the size of your home by using online calculators they have for this purpose. A unit that is bigger than you need simply isn't efficient. Read over hop over to this web-site to see the manufacturers suggestions as to the cooling capacity of the unit for the most accurate information.

An investment in a smart thermostat is truly going to save you money. You can program it to turn on and off at certain temperatures or times, allowing you to ensure that your air conditioner or heater isn't running when it doesn't need to be, saving you a ton.

You should be sure to change the air filter of your HVAC system once every six months. Neglecting to do so can cause dust particles to clog the air ducts. In turn, your system will not work properly and you will find your bills going up. It's worth spending the time to clean the filters.

Change your air conditioner filter quarterly, or four times a year. This not only keeps the air coming into your home easier and cleaner to breathe, it takes a lot of stress off of your AC unit itself. You get to enjoy health, money savings and reduced energy use altogether at once.


A shady spot is always a good choice for the placement of your outdoor compressor. The cooler air that the unit can suck in, the less work it will need to do to further cool the air.

Outer coils can be cleaned with a regular outdoor hose before you turn the unit on for the season. That said, interior coils should be taken care of by a professional so that you don't do any damage as you attempt to clean them. Bring someone in to complete a check up.





If you are thinking of installing a new roof and want it to also boost the efficiency of your HVAC, choose white materials. They reflect the sun's heat so that your attic doesn't get hot, and that means your air conditioner doesn't have to labor as hard to cool your home.

Have your HVAC inspected every year to ensure that it is working properly. The technician will check your filters, drain lines, air flow and Freon levels. This will have your HVAC working at peak performance saving you money all season long. It will also alert you to any repairs that need to be address before they become big problems.

If you can, find a way to create shade over your outdoor HVAC unit. This can actually save you money as shaded air being pulled in by the HVAC unit is typically 5 to 6 degrees cooler than air that's heated by direct sunlight. It's a smart solution to lowering those energy bills.

When comparing quotes from multiple contractors, think carefully about those on the bottom of the price list. It's likely they didn't really look into your home deeply, or they're making promises they can't keep. Do they offer you a guarantee? Are they insured? Do they have a current licence in your state?

If your home gets hot in the summer and you'd like to use your air conditioner less often, consider a metal roof. It reflects the heat right back up into the sky, allowing your home to gain less heat on sunny days. Since metal roofs are permanent, you'll save on repair and replacement costs also.

If you want to buy a new HVAC unit or system, ask a contractor to come up to size up your home and tell you what options you have. They'll have the best advice as they know what sort of systems work in your area or in a home like yours.

Cover your condenser unit for protection in the winter time. That ensures it isn't damaged by the cold and snow. check this link right here now turn it on if the temperature is below 60 either. Instead, put the fan on and don't strain it.

If you already have someone servicing your HVAC unit every year, consider talking to them about installing a new system. Even if you need something custom built, they may have staff on hand who can do what you need. If you already trust them, you know they'll be right for the job.

Whatever you buy should be energy efficient. That means you need to purchase something with an Energy Star label. In particular, you should take a look at the SEER rating. The larger the number, the less you should have to pay in energy costs each month. Even if the unit is a little more expensive initially, you should get that investment back over time.

A good heating and cooling system is critical to maintaining a comfortable home. However, when you don't hire the right skilled professional, it can cause major frustrations and equipment breakdown. The tips you just read should be of benefit to anyone with an HVAC.

Accomplish Better A/C Success Thanks To This Short Article

The HVAC system in your home is a component to having a nice living space. If it's too hot or cold, or you having no air blowing at all, the only thing that follows is misery. You know how expensive it is to fix, so it is vital that you prevent these things from occurring. Below there are many good tips to help you keep up with proper HVAC maintenance.


Global Automotive Cabin Air Filter by leading manufacturers with its application and types 2018 - 2028


Global Automotive Cabin Air Filter by leading manufacturers with its application and types 2018 - 2028 In the end, the report makes some important proposals for a new project of Automotive Cabin Air Filter industry before evaluating its feasibility.


Although most people are thinking of their heating systems during the winter months, air conditioning is also important. When installing a new furnace or heating system, make sure the air ducts are also set up to work with your air condition system. Using the ducts for both heating and cooling is the most economical choice.

Do not be surprised if air conditioner filters 14 x 30 x 1 choose does an evaluation on your home. Any good contractor will spend time looking at the system you currently have and what the needs are for your home. They will also take a look at your duct system and look for air leaks.

If your condenser units are outisde, make sure any debris is cleaned from them regularly. Wind can pile up all sorts of debris against its grill. The whole thing can overheat, causing major problems and possibly an enormous expense for you.

If your evaporator coil, found inside your home, becomes dirty, your unit will lose efficiency. Just pop off the front panel of the furnace and check to see that the coil is dry. Using a brush attachment on a vacuum, gently clean the coil of any dust or other debris.





If at all possible, install double-paned windows in your home instead of those with a single pane. Double-pane windows keep inside air cooler, allowing you to reduce AC usage in the summertime. Your home will also stay warmer in the winter.

Each contractor will have their own fee schedule, so make sure you get several different quotes before you hire anybody. If you call around before making a final decision, it can save you a lot of money in the end. Contact a minimum of five contractors so you can determine realistically what the price will be.

If you want to cool your home in the summer without using your air conditioning on full, consider installing fans in your home. An attic fan can blow hot air out while sucking in cool air into your basement, and ceiling fans help distribute the air in your rooms evenly.

Manage the heat flow into your home with window coverings to help out your HVAC system. In allergy air filters furnace , use drapes, curtains and blinds to block out sunward facing windows to keep heat from building up through the greenhouse effect. Alternatively, make sure that sunlit windows are letting light and warmth in during the colder months.

Be sure to check your evaporator coil drains frequently when your air conditioner is running. If this tube backs up, you can find water damage to your walls, ceilings and floors. If you end up with mold just use a solution of bleach and water to clean out the tube.

The energy efficiency of a unit should be taken into consideration when purchasing a new heating and cooling system. Although you should be concerned about the price of a unit, the efficiency of the unit will save you thousands over the lifetime of the heating and cooling system and should weigh heavily on your buying decision.

Consider all of your alternatives before installing a central air conditioner. You can only cool certain rooms, use whole-house fans, or even make use of a geothermal system. The more efficient the system you set up, the less you'll spend on utility bills over time as you use it.


If your home gets hot in the summer and you'd like to use your air conditioner less often, consider a metal roof. It reflects the heat right back up into the sky, allowing your home to gain less heat on sunny days. Since metal roofs are permanent, you'll save on repair and replacement costs also.

Use your HVAC system to heat your water for free! In the summer, residual heat pulled out of your house is used to heat water through a geothermal system. This will cool your home while allowing you to save a ton on hot water costs, plus it's environmentally friendly to boot!



Camfil USA
200 Creekside Dr, Washington, NC 27889, USA
+1 252-975-1141

When dealing with HVAC contractors, make sure that you get everything in writing. While verbal contracts are legal in many places, it is usually very difficult to prove them. Having everything on paper is a great way to make sure that no ons is confused about any aspect of the process.

When you are looking to buy a new air conditioner, consider your climate. If you live in a hot, dry area, then an evaporative cooler will be your best bet. If you live in a humid area, opt for a compressor-style unit as it's the only one which will work.

When comparing quotes from multiple contractors, think carefully about those on the bottom of the price list. relevant website 's likely they didn't really look into your home deeply, or they're making promises they can't keep. Do they offer you a guarantee? Are they insured? Do they have a current licence in your state?

If you feel like you are spending too much money on your heating and cooling, there is a simple way to reduce this cost. Raise or lower the temperature depending on the season. A single degree in temperature change can equate to almost a nine percent savings in cooling and heating costs.

Keep your evaporator coil clean. A dirty coil will cause the unit to strain when cooling air. You can clean the coil yourself easily. Simply remove the front panel to expose the coil and use a soft brush attached to a vacuum to remove any dust and debris that has accumulated on the coil.

Learn the rules and regulations regarding licenses and insurance before hiring an HVAC professional. This way you can check to make sure that any contractor you consider hiring meets any requirements. This can prevent a costly legal process, especially in case of an accident on site. Without insurance, you could be held liable for damages.

Now that you read the above article, there is no reason for you to let your HVAC system go bad. You should understand what needs to be done to have it working the right way, and that means living in a comfortable home environment. With a poor HVAC system, you will only be miserable, so remember what you learned here to ensure you have a happy home.

Need A/C Help? It's Found In This Post

If you've been wondering if you can learn a little bit about HVAC, then this article is something you should try reading over. It's going to teach you the basics when it comes to this type of thing. This will allow you to get to know what needs to be known about this under your belt.


If your HVAC system us giving you issues, take a look around the house prior to calling a contractor. Make a list of the rooms which are comfortable and which just aren't. The contractor can probably figure out and fix the problem easier.

Clean your permanent air filters or replace disposable ones every single month. If you have the choice, an electrostatic is the best option on the market today. Be sure to turn off your unit before you change the filter as it should never be run without a filter in place.

Whenever possible, try to shade the compressor unit outside. The air that's in a place that is shaded is usually five to six degrees cooler than the surrounding air. Your air conditioning unit will be up to ten percent more efficient if it is properly shaded during the summer months.

Ask for references and be sure to call them as well. https://www.pinterest.com/Sturdivant_HVAC/ are dealing with a high ticket item here, so you'll want to do your due diligence to make sure you are getting the best for your money. Ask for references, but don't stop there. Call each reference to check. A lot of people don't take that important last step.



Benefits of car cabin air filter replacement


Benefits of car cabin air filter replacement Some great advice and tips on getting the most from your sat-nav. They are an amazing invention that make our lives so much easier, but satellite navigation systems can prove frustrating and, if used incorrectly, […]



Camfil USA
200 Creekside Dr, Washington, NC 27889, USA
+1 252-975-1141

Ask for references and be sure to call them as well. You are dealing with a high ticket item here, so you'll want to do your due diligence to make sure you are getting the best for your money. Ask for references, but don't stop there. Call each reference to check. A lot of people don't take that important last step.

In order to cheaply cool your home, turn the temperature up. If you take a few showers a day or just drink a cold ice water, you'll find that you're saving a lot of money on your utility bills by keeping the thermostat a little higher than usual in your home.

If everyone is out, turn the air conditioner off. With the system off, the house will only heat up to a certain temperature. Leaving it on for the entire day means that it is struggling to keep things cool, something that takes lots of energy.

Look for sizing calculators based on the air conditioner you have to figure out how big of a unit you need in your home. If you purchase something too large, you will be throwing away money. Look at the manual to determine the recommended size for air conditioners.

Change your filter on a regular basis. This is one of the easiest HVAC tips that you can do yourself. It is also one of the least expensive things that you can do to ensure that your system is running efficiently. Clogged and dirty filters can make your unit work 5-10% harder.

Outer coils can be cleaned with a regular outdoor hose before you turn the unit on for the season. just click the next post said, interior coils should be taken care of by a professional so that you don't do any damage as you attempt to clean them. Bring someone in to complete a check up.





If you plan on having a service on your HVAC unit, ask the technician what he will be doing. Any thorough service should consist of several things. The technician should check temperature levels, pressures, amperage draw, and coolant levels. They should adjust any belts that need it and clean the coils.

Every month clean out the leaves and debris that may have settled into your outdoor HVAC unit. You'll be surprised at how much gets caught in your unit. Over time these leaves can build up and create issues for your system. Just this little clean up can save you a lot of money in maintenance bills.

If you are thinking of installing a new roof and want it to also boost the efficiency of your HVAC, choose white materials. They reflect the sun's heat so that your attic doesn't get hot, and that means your air conditioner doesn't have to labor as hard to cool your home.

Which way does your home face? Strategically placed trees outside your home can block out the morning sun which can cause your home to overheat. If there is less heat coming into your home, then your air conditioning unit won't have to work as hard.

Improve the efficiency of your air conditioning by installing ceiling fans. Change the airflow direction of the ceiling fans. During the summer, the blades should move in a counter-clockwise direction. During the winter, the blades should move clockwise to help move the hot air in the ceiling down into the room.

If you hear clicking noises from your condenser fan, make sure that it is not striking something inside the unit. If it is not hitting something, it may be bent. Do not try to straighten the blades. This could cause it to become unbalanced. Simply replace the blade to ensure proper rotation.

Choose a contractor who knows how to work with your current system. If they work with that set-up frequently, they'll quickly diagnose any problems and know exactly how to maintain it. Choosing such a firm will save you time and money, and will also save you from unnecessary headaches.

If you want to buy a new HVAC unit or system, ask a contractor to come up to size up your home and tell you what options you have. They'll have the best advice as they know what sort of systems work in your area or in a home like yours.

While it is common practice to negotiate a rate quoted by a contractor, you should not offer an amount that the contractor will find offensive. They have to pay for things like insurance and overhead costs. Keep Click On this site in mind when you are trying to haggle with them for a better rate.

Locating a good HVAC unit is crucial, as it is an investment. When you need to repair or replace parts, use these tips. This will assist you in making an educated purchase.

Simple HEATING AND COOLING Methods You Can't Go On Without

It is very frustrating to return home at the end of the day to discover your HVAC has broken down. Your HVAC unit helps keep your home nice and comfortable so it should be well taken care of. Below you're going to get a lot of great advice to help you with this, so read on!



If you want to know more about efficiently heating or cooling your home, go online and download the ENERGY STAR Guide. It provides information for homeowners to learn more about how they can save money while still keeping their home comfortable all year round, so it is a worthy ready.

Clean https://www.buildings.com/article-details/articleid/3183/title/preventive-hvac-maintenance-is-a-good-investment or replace disposable ones every single month. If you have the choice, an electrostatic is the best option on the market today. Be sure to turn off your unit before you change the filter as it should never be run without a filter in place.

In the winter, wearing layers can save you a ton of money on your utility bill. If you can install a digital thermostat that makes the house cooler when you're asleep and warmer just before you get up, you can see significant savings on your next bill when it arrives.

A good place to place your compressor unit outside is in a shady spot. If https://www.ien.com/operations/article/20781341/maximizing-hvac-system-performance-with-hvls-fans have a unit taking in air that's cooler, it won't have to work so hard to cool air that it sends to your home.

You should be sure to change the air filter of your HVAC system once every six months. Neglecting to do so can cause dust particles to clog the air ducts. In turn, your system will not work properly and you will find your bills going up. It's worth spending the time to clean the filters.

When you buy a new air conditioning unit, don't let the salesperson talk you into too large of a unit. This will be a waste of money and won't efficiently cool your home. The longer a system runs, the more efficient it will be when it's running, so look for one which runs 15 to 30 minutes.



Camfil USA
200 Creekside Dr, Washington, NC 27889, USA
+1 252-975-1141

Keep your condensers free of nearby obstructions. Keep visit this website link , fencing, even bushes back and away from the unit. Two feet is a good minimum distance it should have from anything, including walls, but the more space you give it to breathe, the better it will work and the less likely it will be to fail.

Change your filter on a regular basis. This is one of the easiest HVAC tips that you can do yourself. It is also one of the least expensive things that you can do to ensure that your system is running efficiently. Clogged and dirty filters can make your unit work 5-10% harder.

Service your hearing and cooling systems once each year. When it's checked out, the motor will be inspected, moving parts well oiled and the level of freon adjusted if necessary. Doing this simple task can ensure that your system will be running for years with no problem!

Make sure that the HVAC contractor you plan to hire does not use subcontractors to do their work. Many people use this as an excuse to shirk their responsibility in the event that something goes wrong when your system is being worked on. Only allow this if there is a note in the contract about what will happen if there is an issue.

If you live in a hot climate, don't use duct tape on your HVAC. It just dries out and falls off, leaving you with leaks all over the place. Instead, use mastic sealant to cover any holes or gaps in duct work and you'll keep your home comfortable all year long.

Every month clean out the leaves and debris that may have settled into your outdoor HVAC unit. You'll be surprised at how much gets caught in your unit. Over time these leaves can build up and create issues for your system. Just this little clean up can save you a lot of money in maintenance bills.




Filtrete Smart Air Filters add another layer of intelligence to your home HVAC system


Filtrete Smart Air Filters add another layer of intelligence to your home HVAC system NEWS – Smart thermostats have smartened up your home’s HVAC unit, but it was still up to you to know when to replace the filter to ensure your unit is working in top form.  But now, Filtrete has introduced smart filters that can monitor their own performance to let you know when you should change filters to keep the airflow clean and efficient.  Filtrete Smart Air Filters monitor air flow through the filter, the amount of usage, and the changing air pressure, not just time, to tell you the optimal time to replace the filter.



When deciding where to place your AC, condition the direction of air flow. If you have no choice but to put it in the corner, be sure to buy a unit which allows for the air flow direction to be changed away from the wall.

If your home gets hot in the summer and you'd like to use your air conditioner less often, consider a metal roof. It reflects the heat right back up into the sky, allowing your home to gain less heat on sunny days. Since metal roofs are permanent, you'll save on repair and replacement costs also.

Make sure your HVAC is clear when working outside. You should try keeping any vegetation about two feet away from your outdoor units. Keep the areas above it and on each side of it clear. Make sure you aim your grass clippings away from the unit when mowing. Keep leaves from getting inside your unit in the fall.

Never hire anyone to work on your HVAC system unless they are licensed and bonded. This industry is one where mistakes happen often and you want to make sure that you are protected. You do not want to be stuck paying for medical bills that are more expensive than the work you were having done.

If you want to buy a new HVAC unit or system, ask a contractor to come up to size up your home and tell you what options you have. They'll have the best advice as they know what sort of systems work in your area or in a home like yours.

If you feel like you are spending too much money on your heating and cooling, there is a simple way to reduce this cost. Raise or lower the temperature depending on the season. A single degree in temperature change can equate to almost a nine percent savings in cooling and heating costs.

If your outdoor compressor unit sits in the sun, consider building a shade over it. Air in the shade is about 5 degrees cooler than air in the sun. This can have a significant impact on your cooling bill. When done properly, you could see up to a 10 percent savings over the season.

This advice should assist you in maintaining and repairing your HVAC system. An HVAC system that is not cared for will cost you with large electricity bills and repair costs. By using these excellent tips, your HVAC unit will function correctly for many years to come.

HVAC Can Be Easy With This Guide

HVAC problems are one of those issues homeowners simply hate to see arise. The task of finding a qualified, affordable contractor is something that many simply dread. However, by applying the guidance that follows below, the process can actually be far easier than many might have imagined, so keep on reading.

Let your friends and family know about the discounts that are possible via ENERGY STAR. There's review on Hvac Replacement Air Filters of savings that can be had here, so why hold this good news all to yourself! You can save those closest to you hundreds of dollars over the course of a year.

If you want to know more about efficiently heating or cooling your home, go online and download the ENERGY STAR Guide. It provides information for homeowners to learn more about how they can save money while still keeping their home comfortable all year round, so it is a worthy ready.

Ask for references and be sure to call them as well. You are dealing with a high ticket item here, so you'll want to do your due diligence to make sure you are getting the best for your money. Ask for references, but don't stop there. Call each reference to check. A lot of people don't take that important last step.

When you have an outdoor unit, be sure to keep all plants, flowers, shrubs and trees at least two feet from it. Anything that grows inside it, either above the ground or even roots beneath the soil, can block it up and cause it to break. Give it some breathing room.

Don't let your outdoor HVAC units get smothered with clippings anytime you mow the yard. https://blog.paessler.com/monitoring-ups-hvac-cctv-cameras-network-enabled-devices . Be just as mindful when you blow leaves to not blow them toward your HVAC equipment.




What to Know Before Buying an Air Purifier to Clear Wildfire Smoke


What to Know Before Buying an Air Purifier to Clear Wildfire Smoke While smoke contains carbon monoxide and particulate matter that can be hazardous to your health, the Environmental Protection Agency says "the long-term risks from short-term smoke exposures are quite low," according to a guide to wildfire smoke for public health officials.


When you buy a new air conditioning unit, don't let the salesperson talk you into too large of a unit. This will be a waste of money and won't efficiently cool your home. The longer a system runs, the more efficient it will be when it's running, so look for one which runs 15 to 30 minutes.

When you are no longer using your outdoor air conditioning unit, be sure to protect it with a tight cover. This will keep it free of debris, frost and snow so that you'll have a working unit when the spring comes and you are ready to uncover it and use it again.

You should be sure to change the air filter of your HVAC system once every six months. Neglecting to do so can cause dust particles to clog the air ducts. In turn, your system will not work properly and you will find your bills going up. It's worth spending the time to clean the filters.


If your evaporator coil, found inside your home, becomes dirty, your unit will lose efficiency. Just pop off the front panel of the furnace and check to see that the coil is dry. Using a brush attachment on a vacuum, gently clean the coil of any dust or other debris.





Turn to online reviews if you're not sure how you should hire to perform HVAC maintenance. In many cases you will find local review sites where previous customers will share the experience they had with companies they used. This can help filter out the people you would like to work with.

To reduce the air conditioning's energy cost, close drapes, blinds and shades that cover windows which face the sun. Also, white shades will reflect the heat away from the house, keeping it cooler and saving you money. It is also recommended that you close the vents in rooms that are not used often. This will ensure that you are not spending money cooling less-used rooms.

All contractors charge differently for their services, so get at least four or five quotes before hiring a particular person. Save yourself some money by calling around before you make your final decision. Get in touch with more than a few contractors to best understand the going rate.

When buying an air conditioner, you want to find out with a SEER rating of 13 or higher. 13 is the minimum standard set by the government, so higher ratings, while not mandatory, are going to offer you better efficiency. click the up coming web page can go as high as 19, so keep this in mind as you shop.

If you are going to use the Internet as a source for good HVAC contractors, you need to be very careful. You never know who is behind the glowing reviews that are posted all over the Web. There is a chance that the contractor is posting their own reviews or paying others to do so.

If you feel like you are spending too much money on your heating and cooling, there is a simple way to reduce this cost. Raise or lower the temperature depending on the season. A single degree in temperature change can equate to almost a nine percent savings in cooling and heating costs.



Camfil USA
200 Creekside Dr, Washington, NC 27889, USA
+1 252-975-1141

Ask your neighbors who they have fixing their HVAC systems. Neighborhoods are often built at the same time and will have the same set-ups for heating and cooling. That means if someone did a good job on their unit, they should offer you the same high quality service as well.

Choose a contractor who installs items from more than one manufacturer. They should be able to compare multiple brands to ensure you are getting the right unit for your needs, not just what they have on hand. This will save you time and money when you have a great system in place.

While it is common practice to negotiate a rate quoted by a contractor, you should not offer an amount that the contractor will find offensive. They have to pay for things like insurance and overhead costs. Keep this in mind when you are trying to haggle with them for a better rate.

Make sure you're prepared for a home evaluation from your chosen HVAc company. The technician needs to check out your current home and unit to figure out your needs. They must check teh size of your house, your windows, and the insulation. They have to make sure whatever unit they install is the proper fit for maximum efficiency.

Working with HVAC isn't too hard if you're able to work with it and get into it by using the advice you were given above. Utilize these tips when you are installing your HVAC unit. Get going and reap the benefits.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15