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HVAC Blog | National Air Warehouse

  • Choosing the Right Size Air Conditioner for Your House

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    When you are purchasing an air conditioner for your home, one of the most important choices you will make is the size of the unit. On the market today, you can find air conditioners ranging from 1.5 tons to 5 tons, offered in 0.5 ton increments. But if you aren’t an expert in HVAC, the idea of measuring an air conditioner in tons can initially be confusing. After all, no air conditioner weighs a ton! So what do these numbers mean? Is a 2 ton unit better than a 1.5 ton unit? Is a 5 ton unit the best? Read on for answers to these questions and more!

    Why Air Conditioner Cooling Capacity is Measured in Tonnage

    Usually, when you hear about something being measured in tons, the figure refers to the object’s weight. But for air conditioners, the tonnage of the unit is actually of a measure of its ability to remove a certain amount of heat from the air in your house in a certain amount of time. Specifically, it refers to the unit’s ability to remove 12,000 British Thermal Units (BTUs) of heat from the building in a single hour. Therefore, a 2 ton air conditioner can remove 24,000 BTUs of heat per hour, a 3 ton air conditioner can remove 36,000 BTUs of heat per hour, and a 4 ton air conditioner can remove 48,000 BTUs of heat per hour.

    Not All Sizes Are Created Equal

    Given that air conditioners with higher cooling capacities can remove more heat from the air per hour, you might automatically assume that a higher number is better -- but that’s not true! Choosing the right size air conditioner for your home is essential, and problems can arise if the tonnage is too high or too low.

    If the cooling capacity is too high, your air conditioner will turn on, quickly cool down the house, and then turn off. But the house will soon warm up again, initiating another short cycle. This is a highly inefficient way to keep your house cool, unnecessarily wasting energy and increasing your energy bill. Alternatively, if the cooling capacity is too low, you air conditioner will not have the power to remove all the heat from your house, so it will run constantly. Again, this is an inefficient way to keep the temperature down, and running your air conditioner all day and all night inevitably drives up your energy bill.

    When the cooling capacity of your air conditioner fits with the size of your house, it will go through a few cycles each day. Sometimes it will be on, and sometimes it will be off, but your house will always be at a comfortable temperature, and your energy bill will be under control.

    National Air Warehouse offers air conditioning units with a wide range of cooling capacities. Contact us today for more help finding the one that is right for your home!

  • The Benefits of Wi-Fi Thermostats in Fall Weather

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    With Labor Day over and September well underway, the next few months of fall will bring highly variable weather. Depending on where you live, you might experience short heat waves, brief cold spells, and huge temperature swings between day and night. This variability can make it hard to keep your home at a comfortable temperature, which is why you might want to consider installing a Wi-Fi thermostat. Read on to learn more about this technology and why it is ideal for seasons like fall, when the outside temperature is unpredictable.

    What Makes Wi Fi Thermostats Different

    In the past, homeowners typically had two choices for thermostats: programmable and non-programmable thermostats, both of which have benefits and drawbacks. With a non-programmable thermostat, you change the temperature manually, while with a programmable thermostat, you design a heating and cooling program in advance,  based on your schedule. Today’s Wi-Fi thermostats offer both options, which is one significant benefit to this innovative technology.

    However, the most significant advance in Wi-Fi thermostat technology is that it gives you the ability to check the temperature of your house from your smart phone or tablet. The thermostat is connected to the internet, so the information about the current climate in your house is always at your fingertips.

    Advantages of Wi-Fi Thermostats in the Fall

    There are several key advantages to having a Wi-Fi thermostat when the weather is unpredictable during the fall season:

     

    • You can change the temperature in your home from afar when the weather changes. There’s no telling what the weather will do while you are away from home -- whether you are at work, school, or off an a hike through the fall foliage. If it was cold when you left, you might have left the thermostat on so you would return to a warm house -- but an unexpected heat wave could make your house uncomfortably hot when you return. The opposite could also happen if a sudden cold front rolls in, and you open the door to a chilly interior. A Wi-Fi thermometer prevents these problems by making it possible to adjust the temperature from wherever you are.
    • You don’t have to try to predict the weather with a complex thermostat program. Temperature swings and unpredictable weather patterns -- not to mention your owned pack schedule -- can seriously complicate the task of designing a program for your programmable thermostat in the fall. It is far simpler to use a programmable thermostat so that you can quickly respond to unexpected weather events or scheduling changes.
    • You don’t have to interrupt fun fall activities to go change the thermostat. Fall is a great time to make family memories. Whether it’s raking leaves in the backyard, helping your kids with homework, or making pumpkin-themed snacks, you want to make the most of the season. But if you have a non-programmable thermometer, you might have to interrupt these activities to adjust it so that the house doesn’t get too cold as the sun goes down or too warm as the oven heats up for a pumpkin pie. If you have a Wi-Fi thermometer, you can make the change on your phone, so you won’t miss a moment of the fun!

    At National Air Warehouse, you can find multiple Wi-Fi thermometers to meet your needs. Contact us today to learn more about what we offer!

  • The Benefits of Central Gas Heating For Businesses

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    If you are a business owner, finding an effective and affordable way to heat your business in the coming winter months is a major priority. It also poses a significant challenge for business owners who are trying to heat large spaces. If you own a store, you need to keep your patrons warm and comfortable as they shop so that they stay and browse your products, rather than retreating to the warmth of their cars as quickly as possible. Similarly, if you manage a large office space, keeping the area warm during the winter will help maintain employee morale and boost productivity throughout the workday.

    A great option for business owners looking to heat large spaces is central gas heating. By installing a gas furnace in your building, you can keep a large area warm and comfortable all winter, without breaking your business’s budget. Read on to find out more about the benefits of choosing central gas heating for your business.

    Why a Gas Furnace Is Ideal for Large Spaces

    The process through which a gas furnace generates and distributes heat makes central gas heating an ideal choice for business owners who are trying to heat large stores and workspaces. In the first step of the process, gas is burned in the furnace’s burner. It is then combusted in the heat exchanger, which generates the heat necessary to warm indoor air as it is blown in from the building’s ductwork, passing over the heat exchanger to capture the heat of combustion. In the final step, the hot air is blown into the supply ductwork of the building, which carries it to the areas that need to be warmed.

    If you are heating a large space like a store or an office, the ductwork does not have to be very complex for the warm air to get where it needs to go. Depending on the location of the furnace, warm air can be distributed into the large area shortly after being heated, making a central gas heating system extremely effective while also minimizing energy loss.

    Choosing an Energy Efficient Gas Furnace

    Some business owners worry that central gas heating systems are not as “green” as electric heating systems. However, recent advances in gas furnace technology have significantly improved their energy efficiency. Many of the gas furnaces on the market today have an AFUE rating of 95% or even higher.That means that they use much less energy than the legacy systems that you might be familiar with -- saving your business money and limiting the effects that your central heating system has on the environment.

    If your business is interested in a central heating system, National Air Warehouse has a wide range of options that you can choose from. Contact us today to find the system that is right for you!

  • Heat Pumps vs. Standard Air Conditioners: Comparing the Prices of Split Systems

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    If you are looking to upgrade the air conditioning system in your home or office, one of the decisions that you might have to face is whether to buy a standard air conditioning system or a heat pump system. While a standard split system air conditioner provides familiarity and reliable performance, heat pump split systems also have a wide range of benefits, including a higher degree of energy efficiency. As you weigh the options, one of the things that might be on your mind is price. Read on to look at side-by-side comparisons of air conditioner split systems and heat pump split systems from one of the top retailers in the industry.

    Current Prices for Rheem Split Systems

    Rheem is one of the top HVAC retailers in the industry, providing both electric split system air conditioners and heat pump split systems. Take a look at the prices for some of their comparable products:

     

    1.5 Ton / 14 SEER / R410A / Air Conditioner Split System: $1,637.05

    1.5 Ton / 14 SEER / R410A /Heat Pump Split System: $1,945.44

     

    2 Ton / 15.5 SEER / R410A / Air Conditioner Split System: $1,713.41

    2 Ton / 15.5 SEER / R410A / Heat Pump Split System: $2,079.56

     

    3 Ton / 15 SEER / R410A / Air Conditioner Split System: $1,978.41

    3 Ton / 15 SEER / R410A / Heat Pump Split System: $2,041.74

     

    4 Ton / 15 SEER / R410A / Air Conditioner Split System: $2,505.42

    4 Ton / 15 SEER / R410A / Heat Pump Split System: $2,649.36

     

    Analyzing the Prices of Rheem Split Systems

    As you can tell, there are multiple factors that affect the price of Rheem split systems. One of the most noticeable takeaways from this side-by-side comparison is that heat pump split systems are slightly more expensive than air conditioner split systems. However, it is important to note that a heat pump split system might save you more in the long run by cutting down on your energy bill.

    Other factors that can affect price include cooling capacity and SEER rating. Also, if you haven’t bought a new air conditioning system in a long time, you should take note that all new split systems use the R410A refrigerant, which is much more environmentally friendly than the refrigerants that were previously used -- another great reason to upgrade your system!

    National Air Warehouse offers a wide range of air conditioner split systems and heat pump split systems, including many manufactured by Rheem. Contact us today to find the product that is right for you!

  • When to Consider a Ductless Air Conditioner: A Guide for Home Remodelers

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    During a home remodeling project, there are lots of decisions to make, but when it comes to the climate of the home you are working on, the type of air conditioner you choose can make a huge difference. On many projects, one of your options is a ductless air conditioner system (also known as a mini-split). These systems are relatively easy to install, and they are ideally suited to certain types of projects. Here are some of the situations in which you might want to consider installing a ductless air conditioner:

     

    • Single-Room Additions. Ductless air conditioner systems are most commonly used in single-room additions like sun rooms, garages, and apartments. It is often much easier to install a ductless system than to add on to existing air conditioning system for the rest of the house. Plus, homeowners often prefer single-room additions to have a climate that is different from the rest of the house -- For instance, the garage does not need to stay as cool as the bedroom during the summer, and the renter of an apartment may want to have control over the heat in their living space.
    • Downsizing Remodeling Projects. Not every home remodeling project is about expansion. Sometimes, owners of large houses realize that they are not using most of the rooms, and they want to downsize. This is an especially common scenario for empty-nesters -- after the kids move out, it no longer makes sense to run the air conditioner on high to keep the entire house cool all summer. One option is install a ductless air conditioner system in the most commonly used rooms -- like the living room, the kitchen, and the master bedroom. That way, the thermostat for the main air conditioning system in the house can be kept on low, resulting in both cost and energy savings.
    • Solving Temperature Discrepancy Problems. Sometimes, one room in the house gets a lot warmer than all the others. A small kitchen might become unbearably hot after running the oven for only a few minutes, or a bedroom with south-facing windows might get so hot during the day that it becomes impossible to sleep at night. In these cases, homeowners have to choose between running the air conditioner so high that the other rooms in the house become frigid, or they have to accept that they will break a sweat whenever they cross the threshold into a certain room. A ductless air conditioner resolves the dilemma by making it possible to control the temperature specifically in an unusually warm room.
    • Adding Air Conditioning to Existing Homes Without Ductwork. If you are working with a homeowner who wants in-home air conditioning but lives in a house that has no existing ductwork, it can be extremely expensive to have it installed. Depending on the size of the house, installing multiple ductless air conditioner systems -- one for each room -- can sometimes be the more cost-effective option.

     
    National Air Warehouse offers a variety of ductless air conditioner systems. Contact us today to find the one that is right for your home remodeling project!

  • Distinguishing Between Run Capacitor Options

    As you might guess from the name, the run capacitor plays a key role in keeping your HVAC system up and running. As a result, there’s never a good time to find out that you have a faulty run capacitor. Furnaces, air conditioners, and heat pumps all rely on run capacitors to work properly. The capacitor holds the electric charge that powers the fan motor in your HVAC system, so when the capacitor stops working, you have to get a replacement.

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    Choosing a new run capacitor can be harder than you think. Browsing the options can be confusing, since many capacitors look similar, and the distinctions between them can be hard to navigate: What do Single and Dual mean? What do MFD and VAC mean? As you consider different run capacitors, it can be helpful to understand these terms so that you can identify the run capacitor that is most compatible with your system.

    Single vs. Dual Capacitors

    As you look at the different run capacitors on the market, one of the most important things to note is whether the product you are considering is a single unit run capacitor (often shortened to “single” in product descriptions) or a dual run capacitor (often shortened to “dual”). When you are replacing the run capacitor in your unit, you should make sure that the type you purchase is the same as the one you are replacing.

    A single unit run capacitor hooks up to a single motor, and it is more commonly used in smaller HVAC systems, like small air conditioners. A dual run capacitor incorporates two capacitors into a single unit. With a dual run capacitor, you can power two electric motors. That makes dual run capacitors ideal for for larger HVAC systems, like large air conditioners and heat pump units that have both a fan motor and a compressor motor.

    Comparing Electrical Ratings

    Run capacitors can be described by two electrical ratings: MFD and VAC. The first rating, MFD, refers to the unit’s capacitance, which is given in microfarads (MFD). The capacitance is the amount of charge that the capacitor can store when a particular voltage is applied. The second rating, VAC, is an indicator of the supply voltage for which the unit is rated. Most run capacitors on the market today are either 370 VAC or 440 VAC. You need to make sure that you choose a capacitor that matches the supply voltage for your system, because if the voltage applied is too high, it can cause your capacitor to fail prematurely.

    National Air Warehouse offers many different run capacitors. You can choose between over 30 single unit capacitors and over 50 run capacitors, with a wide range of capacitance levels (MFD). Depending on your needs, there are also both 370 VAC and 440 VAC products to choose from. Contact us today to find the run capacitor that is right for you!

  • The Rise of R410a Refrigerant

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    If it’s been a long time since you last replaced your air conditioner and you’re on the market for a new one, you might realize that new air conditioners with R22 refrigerant are no longer available. Instead, all new air conditioners use R410a refrigerant. The good news for buyers is that R410a refrigerant provides a lot of benefits that R22 did not. When you purchase a new air conditioner with R410a refrigerant, you can expect cost savings in the future, and you can feel good about making a more environmentally friendly choice for your air conditioning system. Read on to learn more about what the rise of the R410a refrigerant can mean for you.

    Comparing R410a Refrigerant to R22 Refrigerant

    R410a refrigerant is a hydrofluorocarbon (HFC). Unlike R22 refrigerant, which a hydrofluorocarbon (HCFC), R410a refrigerant does not contribute to the depletion of the ozone layer. Even better, R410a refrigerant absorbs and releases heat more efficiently than R22 refrigerant. There are several key benefits that result from the higher energy efficiency of R410a refrigerant. Specifically, air conditioners that use R410a refrigerant:

    • Save homeowners money in the long run.
    • Contribute less to energy-use-related environmental problems like climate change.
    • Are less likely to overheat, which can reduce the risk of compressor burnout and the long-term deterioration of the air conditioning system.

    Legal Regulations Surrounding R410a and R22 Refrigerants

    Starting in 2010, all newly manufactured air conditioning systems sold in the United States were required to use R410a refrigerant rather than R22 refrigerant. Beginning in 2015, R410a refrigerant officially became the new standard for residential air conditioning systems in the United States.

    However, it is important to note that you can still order replacement parts for air conditioning systems that use R22 refrigerant. Some of the products on the market that are compatible with older air conditioning systems that use R22 refrigerant include:

    • Vertical evaporator coils
    • Horizontal evaporator coils
    • Front return upflow air handlers

    Of course, since it’s been so long since R22 refrigerant was used in AC systems, you may want to consider replacing your old air conditioning system altogether and investing in a new one. Whether you decide to opt for a replacement part or make the switch to a newly manufactured air conditioning system that offers the environmental and economic advantages of R410a refrigerant, you can find what you need at National Air Warehouse. Contact us today to learn more about the products we offer!

  • Choosing an Air Conditioner with the Right Heating Capacity for Your Home Building Project

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    As a home builder, choosing the right air conditioner can make or break the success of your project. If you make the right choice, you can ensure an optimal climate for the home without busting the homeowner’s wallet. With the wrong air conditioner, the new house might remain uncomfortably warm, even when the AC system is running at full capacity, and and it can significantly increase the homeowner’s energy bills.

    Some of the aspects of air conditioning systems that home builders have to consider include heating capacity, cooling capacity, cooling efficiency, heating efficiency, air flow orientation, price, and brand. Read on to learn more about choosing a system with the right heating capacity for your project.

    Understanding Heating Capacity Measurements

    For HVAC equipment, heating capacity is measured in British Thermal Units (BTUs). Formally, one BTU is defined as the amount of energy that is required to raise the temperature of one pound of water by one degree Fahrenheit. In the context of an air conditioner, the heating capacity is the amount of energy that it takes to remove a certain amount of heat from the surrounding air. For air conditioners than are intended for entire homes and buildings (rather than single rooms), you will typically see BTUs ranging from about 40,000 to over 115,000.

    Factors Affecting Air Conditioner Heating Capacity Needs

    At the most basic level, the number of BTUs you need the air conditioner to have depends on the size of the home you are building. Put simply, a larger home needs an air conditioner with a higher heating capacity. However, there are also other factors that can affect the needs of the home. These include:

    • Window type, size, and location. Windows affect the amount of sun the home gets in the summer, which in turn impacts the amount of heat that must be removed from the air by the AC system.
    • Insulation type and quality. If the home has excellent insulation, you may be able to get away with an air conditioner with a lower heating capacity.
    • Height of the ceilings. The height of the ceilings affects the overall amount of heat that must be removed from each individual room, and it also impacts how much heat is retained within each room.
    • Location of the home. If the home is located in a cool climate, the necessary heating capacity for the AC system is lower than it would be for a house of the same size in a warmer climate.

    At National Air Warehouse, homebuilders can find air conditioning systems that work for any project. Contact us today for more information!

  • Does Your Air Conditioning System Need a New Condenser Fan Motor?

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    During the dog days of summer, there is nothing worse than an air conditioning system malfunction in your home or business -- especially if you are unable to determine the cause. Immediately jumping to the conclusion that you need to replace your whole air conditioning unit can be a costly mistake, but it can also be very expensive to hire an expert to identify an easily diagnosable problem. When your air conditioner stops working, one of the simplest things to check for is a malfunctioning condenser fan motor.

    The Importance of the Condenser Fan Motor

    In an air conditioning system, heat from the surrounding air is absorbed by a refrigerant, creating cool air that can be circulated throughout your home or business. The condenser is the part of the system that releases the heat that has been absorbed by the refrigerant during the cooling process, which gets the system ready for the next cooling cycle. As the refrigerant releases the heat, the condenser fan blows the heat past the condenser coil so that the heat can be released. The condenser fan motor is the driver of the condenser fan, so it is essential for the proper functioning of your air conditioning system.

    Diagnosing Problems with Your Condenser Fan Motor

    A telltale sign that your condenser fan motor might not be working is a situation in which your air conditioning seems to work for awhile, but then stops working. When you initially turn on the air conditioning unit, it will blow cold air into your home or office, but a short time later, the unit will just start blowing out room temperature air.

    To further investigate the situation, you can turn the system on and monitor the condenser fan. If the condenser fan does not start spinning within 20 minutes, it is likely that there is a problem with the condenser fan motor. There is a chance that the problem is mechanical -- that is, a stuck fan -- so you can try to get it spinning again by nudging it with a small stick. However, if this does not work, you probably need to replace your condenser fan motor.

    Replacing Your Condenser Fan Motor

    Luckily, most condenser fan motors are not extremely expensive. You can buy a high quality condenser fan motor for $175 to $200, which is much less than purchasing an entirely new air conditioning unit. National Air Warehouse offers top-notch condenser fan motors at competitive prices. Contact us today to find a motor that works for your system!

  • Understanding Insulation Ratings for Duct Replacements: A Guide for Home Remodelers

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    If you are a home remodeler, you might find yourself needing to replace the ducts in existing HVAC systems. Whether the duct is in an attic, a basement, or a crawlspace, the wear-and-tear of long-term usage can damage the duct, resulting in leaks that cause air to escape before it can be released into the home. In many cases, ducting needs to be replaced as part of a larger home remodel, in order to ensure that a comfortable climate can be maintained in all rooms of the house.

    While the ductwork in an older home may be uninsulated, most of the replacement ducts on the market today are insulated. When you consider the options, you will find that different ducts have different insulation ratings, which are expressed as R-values. You need to understand what the R-value means in order to choose the right one for your home remodeling project.

    Thermal Resistance (R-Value) Definition

    The United States Department of Energy defines thermal resistance, also known as R-value, as “the insulating material’s resistance to conductive heat flow.” Put more simply, the R-value measures the effectiveness of the insulation material. A material with a higher R-value is a better insulator. Some of the factors that influence R-value include the composition of the insulation material, the thickness of the material, and its density.

    The Right R-Value for a Home Remodeling Project

    When deciding how high the R-value needs to be for the home remodeling project that you are currently working on, the two main things you need to consider are the climate zone in which you are working and the location of the ducting within the home.

    • For homes that are located in a COLD CLIMATE, a high R-value is extremely important. If the ducting is located in an attic, the R-value should be between R6 and R11. For ducting located in a crawlspace or unheated basement, anywhere from R2 to R11 will probably suffice.
    • For homes that are located in a MIXED CLIMATE, a high R-value is slightly less important, but it can help to save the homeowner money during the colder months. If the ducting is located in an attic, an R-value between R4 and R8 is sufficient. The range expands if the ducting is located in a crawlspace or unheated basement; anywhere from R2 to R8 will probably work.
    • For homes that are located in a WARM CLIMATE, you should still be looking for replacement ducts with R-values between R4 and R8 if the ducting is located in the attic. If the ducting is located in a crawlspace or unheated basement, you can probably get away with no insulation at all, but to be on the safe side and help save the homeowner money, most home remodelers choose ducting with an R2 or R4 value.

    If you’re looking to purchase ducting for your home remodeling project, National Air Warehouse offers options with R-values ranging from R4 to R8. Contact us today for more information about our products!

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