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HVAC Blog | National Air Warehouse

  • When to Call in the Calvary: Should You Install Your Own HVAC or Phone the Experts?


    Installing an HVAC system on your own or with a partner may seem like the most optimal decision for you, however there are some things you must consider before attempting this task on your own. Not meeting certain requirements in the process can have legal and safety complications.


    Heating and cooling hardware require certain codes and regulations to be satisfied when they are installed. The professionals know these codes and will do their best not to violate any of them. If you decide to do this yourself please make sure you adhere to any and all heating and cooling regulations. Failure to do so can result in improper use of the system which can cause legal ramifications especially for businesses using these systems. Small business owners should absolutely consider getting a professional to install for them to avoid business being shut down for code violations.


    Installing a unit yourself may be more trouble than it is worth. You will need to track down a unit you want and at a price you are satisfied with. Professional installers can order directly from manufacturers usually for a break on the price you may not get. On top of the cost of buying the equipment you also have financial loss from the time it takes to complete. If you have a rigorous work schedule you will need to take time off as projects like this can last days for an inexperienced installer. This time off work also costs money and the cost may not outweigh the price of hiring a professional to do the work for you. Your hard work and time can be spent on another home project while the pros handle your heating and cooling.

    Technical Issues

    The installation process for a HVAC system is very technical. Experts go through rigorous training to make sure no mistake is made. They often go to school to learn the trade so that they do the job safely, efficiently and without invoking legal ramifications. Improper installation can lead to leaks in your system that could end up threatening your safety, not to mention the cost of paying for air you are not even getting!      


    After reviewing this information it is likely that hiring a professional installer is your best bet. It is not worth the safety and legal ramifications that you could unintentionally pull down upon yourself. Bigger mistakes may even end up costing you more than you saved from doing it yourself.

  • Lower your Heating Bill with some Improvements

    Winter is coming!! Fall is already here. If you are noticing that your house doesn't hold the heat in very well, here are a few tips for you.

    Inspect and Replace your Weatherstripping

    "What's that?" you say? Well, it's the seal on all of your outside doors that prevents cold air from seeping through the cracks around your door. Over time, this stuff gets worn out, and leaks air into your home. This will cool down your house in a hurry and make your heater work overtime.

    Check and adjust your Threshold

    This is the same principle. If you can see daylight under your door, that means there is cold air coming in and hot air going out. You may need to buy a new threshold, but usually the one you have can be adjusted with the screws that old it to the floor. Simply turn them to raise the threshold slightly and close the gap.

    Find the Holes in your Exterior Walls

    Why are there holes in your walls? Well, every pipe or electrical wire that goes into your home needs a hole, and it's entirely possible that one or more of those is not insulated correctly. You can plug these gaps with expanding foam to prevent the flow of air. As a bonus, this will prevent insects and mice from getting into your walls!

    Seal your Flue

    If you have a fireplace, your chimney is very likely to be leaking heat. Even with the flue closed, it will be leaking air. To solve this problem you can get a chimney balloon, or get creative and rig something up. This is a major source of heat loss, so it will pay for itself.

    Check your Ductwork

    Homes with forced air heating can lose a significant amount of heat through leaky ductwork. Sometimes you will lose a quarter of the warm air being pushed through in useless places like the attic. Inspect it wherever you can, especially around joints, and seal it up with metallic duct tape.

    Check the Locks on your Windows

    The locks on your windows are designed to push the window into the weatherstripping and create an airtight seal. If you forgot to lock one of your windows, it will be leaking air, and costing you money.

    Upgrade your Windows

    Shy of actual leaks, the windows are the most poorly insulated part of your exterior, and will allow the most heat to escape. If you have single pane windows, you will be losing a tremendous amount of heat through them. Single pane windows conduct heat out of your house very effectively and essentially do not insulate your house at all. Double pane windows work to insulate not because there is more glass, which does not insulate effectively at all, but because there is a layer of air between the panes of glass that does not effectively conduct heat out of your home, and thus prevents heat loss.

    Upgrade to a modern double pane and you will see a significant effect.

  • Preparing your Air Conditioning Unit for Winter

    Believe it or not, your air conditioning unit isn't something to just forget about in the winter. That can cause serious problems for you down the line, which could leave you stuck with a broken unit come summer.

    That is an expensive and very uncomfortable mistake to make. Let's get to it:

    screen-shot-2016-10-20-at-3-34-03-pmTurn the unit off!

    Find the air conditioner circuit breaker by your unit, shown to the right of the unit in this picture, and turn it off. This is very important. On a relatively warm winter day, if you happen to be baking and you have a space heater running and the sun is shining fully into your windows, you could very well have your AC kick on.

    Why is that bad? Because it can cause moisture to enter your unit. Moisture that will not have time to evaporate before the outside temperature goes below freezing and night and the expansion of freezing water wrecks your unit.

    Wash your unit before temperatures hit freezing in the fall

    You need to make sure that all of the debris of the fall, bird poop, twigs, leaves, and everything else is cleaned out of the unit. Allowing that to build up inside can interfere with moving parts, and if you manage to avoid that fate, it will eventually cause the unit to overheat.

    Overheating can make it shut down, at which point it obviously isn't working, or it could ignite the debris in your unit and cause a fire, so do not ignore this.

    Cover the unit with something

    Once you clean the unit and turn it off, cover it with a vinyl covering or a well secured tarp to prevent any new debris, water, snow, or ice from finding its way into your unit. The covering must be waterproof.

    You can buy specifically designed covers for your air conditioning unit, but you can also make something else work if you're determined.

    Secure your air conditioner cover tightly with bungee cords or other means. If you fail to do this small animals may see it as a safe and cozy place to hide in the winter, and they may not all make it out in the spring. Having a dead mouse in your air conditioning unit is not something you want to have to deal with when you turn on your air conditioner the first time in the spring.

    Be sure to check the unit regularly, especially after storms, to make sure that the cover remains in place all winter.

    Windows Units

    If you have a window unit, the easiest thing to do is simply remove the unit and store it in your house or in a shed.

    Windows units also do not generally provide a good seal, which causes cold air to leak in all winter if they are not removed, which has a significant impact on your heating bill.

    Be kind to the environment and to your wallet by taking it out.

    Follow these tips to prevent damage to your your air conditioning unit and it will last you much longer.

  • 5 Common Heater Fixes

    If your furnace breaks this winter, reading this little article might save you a lot of money. Before you call a professional, you should know that the most common causes for a breakdown in a furnace are actually easy fixes that any average person can attend to.

    Professionals often get called out to attend to problems that only take a few minutes and sometimes no hardware to fix. They then still need to charge you for their driving time, and whatever the minimum service charge is, leaving you out hundreds of dollars for a problem that you could have fixed just as quickly yourself.

    Here are 5 things to check before you call:

    Is it turned on everywhere that it needs to be?

    This is actually the most common problem that a service person gets called out for.

    1. Check your breaker to make sure that the heater has power.
    2. Check for a wall switch that needs to be turned on.
    3. Make sure the front panel of the heater covering the blower motor is fully in place, as heaters have a fail-safe switch that needs to be fully pressed in for the furnace to operate.

    Change your filters

    screen-shot-2016-10-14-at-1-35-38-pmIf your filters are clogged, you will have restricted airflow and it will cause overheating that can trigger a safety shut-off. Heater filters are inexpensive and should be changed every month during heavy use.

    Read your owner's manual to find out where your filter is and how to replace it.

    Warning! : Always make sure that the furnace is shut off before you change the filter.

    Check to see if your gas is on

    You may have forgotten to open the valve to get gas to your furnace. Check the gas lines between your furnace and the meter, you'll find a lever somewhere. Turn it so that it is parallel with the pipe.

    If you have an old furnace, you may also need to make sure that your pilot light is lit.

    Check your ductwork

    screen-shot-2016-10-14-at-1-35-48-pmIf you simply aren't getting heat in one or two rooms, you probably either have a blocked duct, or a hole in your ducts where the warm air is escaping.

    Check the portions you can access, and if you find any holes, patch them up using metallic duct tape. Regular duct tape will deteriorate quickly, so make sure you use the metallic type.

    If you find any blockages, clear them out.

    Check your intake and exhaust vents

    Your heating system draws air from the outside. If those vents are clogged with leaves or debris, your heater will not work properly.

    Check your thermostat

    Believe it or not, many calls also come in from people who simply didn't set their thermostat from cool to heat. Make sure that the thermostat has power, and that the correct settings are entered. This may require changing a battery.


    With these 5 tips, you may be able to save yourself hundreds of dollars this winter, so take your destiny into your own hands a little bit and make sure your issue isn't something embarrassingly simple that you will regret having to spend money on.

  • Heat Pump Replacement: How to Tell Your Heat Pump Needs Replacing

    Heat pump replacement Heat pump replacement

    Heat pumps allow thermal energy to move against its impulsive flow direction by applying heat absorption within a cold space and then continue movement to a warmer space. A heat pump is a mechanical device that can break down and likely needs to be replaced. Your HVAC system does not need to stop functioning completely for you to think about replacing any part of it. You will notice warning signs that will alert you when it comes time for a heat pump replacement.

    Taking Steps

    If your heat pump stops functioning altogether, then the next step is to get a replacement. However, in the meantime, there are signs that you can look for in order to consider replacing your heat pump before it completely breaks down. Let’s take a closer look at this.

    Constant Heat Pump Repairs

    If your heat pump is constantly breaking down and having to be repaired, you may have to look at heat pump replacement. In fact, if it breaks down several times within the same year, this is a sign that replacement should be the next step. If repair costs are too high, then this may call for purchasing an entire HVAC system or just a heat pump, depending on how much you will save. When your heat pump breaks down at a time that it is needed the most, then it can cause so many inconveniences. Therefore, it is wise to make sure that you hire a professional HVAC contractor to inspect your system before the weather becomes cold.

    Abnormal Noises

    If you hear abnormal noises coming from your HVAC system, it may be time for heat pump replacement. All mechanical devices are designed to operate smoothly with no internal resistance or too much friction. With abnormal noises coming from the heat pump, you may have loose parts and components that have started to wear down. A professional HVAC technician will assess the situation, tracing the specific parts or components that may be loosened. This includes:

    • Depleted motors
    • Vents
    • Defective ductwork
    • Dirty filters

    The moving parts may be able to be repaired. However, if nothing changes after the repair, it may be time for a new heat pump replacement. This is the more permanent solution.

    Increased Energy Consumption

    If you notice that your energy bill is steadily increasing and you are still operating the same number of mechanical devices and appliances in your home, this could point toward energy being lost somewhere. The only time you should see an increase in energy consumption is when you add a new appliance. A professional HVAC contractor will be able to determine the cause of the increase and if the heat pump is the cause, a replacement should be done.


    If you have had your heat pump for a number of years, it may be the time for a heat pump replacement. A professional HVAC contractor will assess and make the appropriate recommendations of how long you should keep your heat pump before doing an upgrade.

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  • Top Reasons to Pay Attention to your Heating System During the Summer?

    Heating System Heating System

    In every season, you should expect to have HVAC maintenance carried out in order to have your cooling and heating system working efficiently. Bear in mind, though, it does not mean that you have to focus your attention on your air conditioner unit in the summer months and the heating system in the winter. It is important to take the appropriate care of your HVAC system throughout the whole year so that it will always operate to its full capacity.

    Summer Preparation

    Yes, you may be hanging out on the beach during the summer and a heater is the farthest thing from your mind. Yet, you cannot wait until the winter is upon you before taking care of your furnace or other heating system. The season may arrive and that is when you discover problems with your heating system. It is better to approach a season, being confident that everything inside your home is working properly. Below are some of the top reasons why you cannot afford to neglect your heater during the summer.

    Don’t Regret Your Decision

    If you need to have a heater repair done as the winter comes to a close or if the heater is providing warning signals of malfunction, you may need a new heater. For this reason, you should not ignore the signs. If you don’t take immediate action, you may regret your decision. You should not wait to schedule a repair at the last minute. If so, you may be put on a waiting list and who wants to go through winter without a functional heating system? The HVAC technician needs time to inspect the situation and conduct the necessary repairs so that you can be comfortable during the winter months.

    Advanced Maintenance

    One of the things to prevent being an uncomfortable situation is putting your HVAC maintenance on a schedule with a HVAC contractor. Therefore, try to have a healthy heating system at all times by frequent maintenance. There are various tasks that are involved with furnace maintenance and some of these include cleaning dirt and dust, inspecting the air flow, lubrication of moving parts, and thermostat testing. Doing this in the summer makes you prepared for the winter.

    Heat Pump

    Heat pumps are generally used both in the winter and in the summertime. If you do not have your heat pump repaired, then the choice will also affect your air conditioner unit. You will be switching your system to cooling during the summer, but that doesn’t mean that you should completely ignore any heating issues until the winter.

    Proper Ventilation

    Both heating system and cooling system utilize the same ventilation to function, especially when your system uses forced air. For this reason, you have to keep the air ducts clean, not only to improve air quality, but also to prevent this from negatively impacting your HVAC system’s efficiency. When you have problems with your heating system, it can also result in an increase in your summer’s energy bill.


    Be sure that you change your air filters on a frequent basis, even during the summer. Contact a HVAC contractor or HVAC technician today to schedule an overall check on your heating system and cooling system.

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  • The Best Methods of Air Duct Cleaning

    Air duct cleaning Air duct cleaning

    Most of the residential and commercial buildings these days are usually erected with ventilation, HVAC, heating or air conditioning ducts. Since these are tightly assembled, it is rare that stale air or fresh air will circulate at the same time. If this occurs, then there may be accumulated pollutants in the air ducts. This will typically create air that is unhealthy for everyone living in the home. Subsequently, these same pollutants will become irritants, negatively impacting the health of the occupants of the building. In many cases, people will suffer from respiratory conditions and in other cases, the pollutants could likely cause damage to the home.

    Reducing or Eliminating Pollutants

    When you clean the HVAC air ducts, it will drastically eliminate or reduce the pollutants, creating healthier air and improving the health of the occupants. There are several suggestions for air duct cleaning. However, it is best to hire a HVAC contractor with more knowledge about the best practices for air duct cleaning. In so doing, the project will be done more properly and it will reduce the appearance of annoying rodents.

    The Disadvantage

    The disadvantage of air duct cleaning if you do this yourself is that you could ultimately damage the air ducts. So, to improve the air quality in your home, it is strongly recommended to get professional assistance. The HVAC technician will be able to tell when your next duct cleaning will be necessary. It is especially important, though, to know as much as you can about air duct cleaning so as to establish the one that is ideal for you. While you will be relying on a professional HVAC contractor, you will still have personal knowledge about what is involved and the methods used.

    Common Methods

    The most common methods used for air duct cleaning over the years is industry standard. As time goes on, advancements are being made to continue improving the methods involved in the process. However, for now, the methods employed are as such:

    • Power Vacuum or Air Sweep – this is a meticulous method of duct cleaning, although, more expensive. It does the best job of removing dirt in an extremely careful manner.
    • Point of Contact – while this may not be as thorough as the air sweep method, it is safer for the vents and air ducts. It is also less expensive, but still uses a vacuum, and spinning brush as the best cleaning tools
    • Removing the Source – this is the most common of all three methods for air duct cleaning. Mechanical agitation loosens the dirt and debris and extraction helps to remove everything entirely in a safe manner.


    Methods of air duct cleaning have been around since the 1900s. However, the techniques have evolved since that time due to the work done by knowledgeable and experienced HVAC contractors. When you hire a professional HVAC technician, you stand a better chance to have improved air quality in your home.

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  • Commercial and Residential HVAC System Comparison

    Commercial HVAC System Commercial HVAC System

    There are a wide range of HVAC systems, but the two main ones are commercial HVAC system and residential HVAC system. Residential systems are used in people’s homes and commercial systems are used in major retail stores, warehouses, office buildings, and other large buildings.

    Both Systems

    Both of these systems have similar functions such as ventilation, heating, and cooling. However, they do have just a few differences such as:

    • Size
    • Power
    • Drainage
    • Location
    • Complexity
    • Manufacture
    • Features

    There are HVAC companies that do specialize in commercial and residential systems. There are others that only specialize in cooling systems or heating systems. This will help to explain the reasons for the services being different. Some of the differences have exceptions, but they are mostly the same. Let’s take a closer look.

    The Complexity

    Due to the size and complexity of the commercial HVAC system, it has to be installed on the building’s roof. The reason is to ensure adaptability and space. The type of commercial system chosen will depend on various factors such as the number of occupants in the building, the varying temperatures, scheduled events and the number of hours the business operates. Other factors include items being sold, type of inventory, and number of windows in the building.

    The Size

    Of course, the commercial HVAC system is going to be larger than the residential system. This is a visible difference and the reason is that one heats and cools a larger space. So, the size will be different between the two and so will the power. The thermostats and dampers are also different in size and scope.

    The Location

    Residential HVAC systems are usually found at the side of a house. In some cases, you may find it in someone’s backyard. On the other hand, commercial HVAC systems are located in either swamp coolers or roof of a building as mentioned before. The roof tends to be the most common installation area chosen by most HVAC contractors. Why? Here are some reasons:

    • The indoor space is needed to conduct business in a commercial aspect and so a large HVAC system would only take up too much indoor space. It also can be less attractive if placed inside the building and more importantly, it functions better when installed on the roof
    • A commercial system would be too noisy and could be a disruption to business
    • It is easy to maintain on the roof. HVAC technicians can do repair and maintenance work without disrupting the business day
    • Vandalism and damages will be at a minimum because of less traffic on the roof where the commercial HVAC system is located


    It is important to have a HVAC contractor to handle the maintenance of your air conditioning unit or heating system. It is still your responsibility, however, to make sure that you call a professional when it is necessary and before any malfunctioning occurs.

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  • A Look at HVAC Maintenance for Each Season

    HVAC Maintenance HVAC Maintenance

    One of the poignant facts in life is that nothing is perfect and that includes your HVAC system. One day, everything may begin to fall apart. Therefore, landlords and homeowners alike have one main responsibility and that is to make sure that the tenants or family members can live inside the building comfortably all throughout the year. What does this mean? It means that your home or apartment will be kept cool during the warm months and whenever you need to have air conditioning unit turned on.

    The Truth

    One more regrettable truth about this is that HVAC maintenance and repair needs to have specialized expertise and skills as well as necessary equipment that many homeowners and landlords do not have. For that reason, you are going to need the services of a HVAC repair contractor. The trick about saving money is to schedule an appointment with a HVAC contractor as soon as possible. You cannot procrastinate, but you must know when to make that phone call.

    Do Not Procrastinate

    If you wait too long, or until the AC system is broken, then you may have to wait for weeks or days to get the contractor to come to your home. Remember, these specialists are always busy serving other clients. Below are some suggestions on when you should call the technician so your system can run smoothly all year round. Let’s look at the different seasons.

    The Summer Time

    During the summer, you will definitely need your AC. It is important to get preventative maintenance done during the spring so that you don’t encounter any problems during the summertime. If your air conditioning unit is running, but it is not doing so efficiently, you may want to have the air filters changed and get rid of dust in and around your AC unit. Otherwise, you should solicit the services of a HVAC technician to see what the problem is.

    During the Fall

    As summer ends, the temperature will begin to drop. This is the ideal time to contact an HVAC contractor to inspect your heating and furnace system. The goal is to try to apply preventative measures prior to waiting until issues arise. Furnaces are like any equipment. They need frequent tune up. This is the perfect time, too, to ensure that you have enough filters for your furnace and that they are changed as needed.

    Winter Weather

    There are not many things that are more risky and uncomfortable than to be inside a home with no heat during the winter. While you may have had preventative maintenance done on your heating system, something can still go wrong. Make sure you have the phone number of a reputable HVAC technician that you can call on a moment’s notice.

    The Springtime

    A reasonable time to contact an HVAC contractor is in the middle of spring. At this time, the contractor will look at your HVAC system to see what kind of preventative measures need to be performed. The HVAC contractor may conduct a check and balance on your refrigerant levels, replace filters and clean your system.


    Lucky for homeowners, most of the HVAC problems can be fixed. However, these problems will usually need specialized skill. Always include your HVAC contractor when heating and cooling system issues arise, no matter the season.

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  • How Natural Disasters can Adversely Affect your HVAC System

    HVAC system HVAC system

    Even though, you may be keenly concerned about your uprooted trees, windows, and roofing system, after you have experienced a natural disaster, your HVAC system could also be in jeopardy. Once the natural disaster passes and your electricity is restored, it is crucial that you become familiar with the ways that a storm or hurricane could damage or destroy your HVAC system.

    Lightning Effect

    When lightening does strike, it can adversely affect your air conditioning or cooling system since this relies on electricity in the home to function properly. When the electricity is disrupted, it could cause issues to your air conditioning system. The additional power resulting from a lightning strike could flood the circuit breaker in your home. It could damage electronics and appliances. It would be recommended that you install a surge protector prior to any natural disaster. This can absorb most of the electricity before it can damage anything in your home. A surge protector is also important in saving your HVAC equipment.

    Hail Effect

    When a tornado strikes, it comes with high winds, but also lightening. Hail, on the other hand, could follow a tornado or severe storm. It comes with heavy pelts that could subsequently damage your HVAC system. To protect the fragile parts of the condenser coil, it would be ideal to install a hail cover over the air conditioning unit. It may not deflect everything since small debris can go through the guard, lodging in the equipment. When this happens, you should contact an HVAC contractor for some assistance before even making an attempt at using your air conditioning again.

    Water Damage

    A storm or hurricane comes with lightening and heavy rains, causing water damage. In fact, when the storm hits an area, its slow movement could cause a significant amount of water to accumulate in your yard and around your HVAC system. Debris and grass could wash into the HVAC unit as water rises.


    Before you experience severe weather, it would be an excellent idea to contact an HVAC contractor to inspect your outside HVAC unit. The HVAC professional would make sure that the unit is elevated to a height to keep out as much standing water as possible. You could also consider placing a mesh cover over the condensing unit. The mesh cover will be able to keep water from heavy rains from getting inside the unit. Always be mindful, though, that you should remove the mesh cover when you want to use your air conditioning unit. If you don’t, it will block the air flow.

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