Calculating the Correct Size Air Conditioning Unit If you’re in the market for a new central ac unit, it’s important that you choose the right size for your living space. Not all central air units are created equal, and having the incorrect size could leave the indoor environment of your home very uncomfortable. A unit that is too small for your home could leave your home feeling warm and muggy. If the unit is too large, your house will always feel too cold. At RA Heating & Air Conditioning, we can help you shop for the perfect unit for your home. Our contractors have the experience necessary to assess your indoor living space and recommend the correct size unit to comfortably cool your home. Air Conditioning Estimates – What to Expect Another important aspect of calculating the correct size is having properly sized ductwork. If your home already has ductwork from a previous central air conditioning system, it’s a good idea to consider whether you were always happy with the flow of air from your current ductwork.

If you remember feeling too cold or hot in certain rooms, our professional HVAC technicians can assess your current ductwork and determine if it needs better insulation or if it needs to be redone. Too small ductwork can be noisy, and any improperly sized ductwork can decrease the efficiency in which your unit delivers air. Once you’ve chosen a unit, one of our contractors will install it for you. RA Heating & Air Conditioning services the Madison, WI. areas and can have your new unit up and running shortly. We offer competitive central air conditioner prices, and we encourage you to visit us to discuss how we can help you choose the correct central ac unit for the size of your home. Buy Products Online Now Click Here for Security Safes Thank you for a great service at Trout Springs Winery. Mark and Kyle were professional, courteous, and informative with their installation of the AeroSeal product. We had loss of duct air of about 450 cfm, which amounted to about a ton of heating, and they cut it down to about 9 cfm.

We were amazed to see the difference in air flow once the job was complete. Again, thank you for your great service! Connie- I wanted to quick share our experience with R. A. Heating and Air Conditioning Inc. because it was extraordinary. From the customer service, to the billing and then the follow-up, I am in awe that a company with your integrity still exists! We recently had comfort challenges with our very old (renovated) farm house. Mark, your technician came out and discussed Aeroseal with us and did a complete evaluation on our house and where we were losing heat and where we could save money! We couldn’t be happier with the results. Less propane used, less dust in the house, more comfortable in every room without cold and hot spots, and our house actually smells better- no more basement old farmhouse smell. Thank you R. A. for making our house a comfortable home! In today’s fast paced society that we live in, good service is often hard to find but R.A. Heating consistently delivers exceptional service!”

Determining the power required by an appliance Maximum vs. Rated Power To determine your basic home power needs, start with these three questions: Do you use city or well water? Well pumps require a larger 240 volt generator (3800 watts or above). Is your heating system electric, heat pump, or gas or oil forced air?ac and heater turn on at the same time Gas or oil forced air systems can get by with a very small generator – ashow much do new central ac units cost little as 2500 watts.  no hot air from car acThe power needed is based on the size of the furnaceSee below for details. Electric furnaces and heat pumps typically need 15,000 watts or more to run and cannot be powered by a portable generator.

Is your hot water heater electric, gas, or oil fired? Gas or oil fired heaters use less power – as little as 2500 watts. Electric heaters often require at least 4500 watts. Homeowners can often power most household appliances using between 3000 and 6500 If your home has a smaller furnace and city water, you can generally expect that 3000-5000 watts will cover your needs. If you have a larger furnace and/or a well pump, you will likely need a 5000 to 6500 watt generator. The primary factor you need to consider is the size of your AC unit(s). Campers, Tailgaters, and Boaters: Industrial power needs range widely, based on what kind of tools you are using. To determine your power needs, start with our wattage estimation guide can help you to build a quick estimate.  choose the tools you will be using and add up the wattage. Keep in mind that wattage required for starting a tool or appliance with a motor will be much higher than the watts required to run the device. 

starting vs running wattage below. If you need the wattage on a specific tool, see our section on determining the power needed by an appliance below. See our section on power management to learn how to use a smaller generator to power more. Most appliances and electric motors list their power requirements in amps. Use an appliance load tester to determine the exact power needed for a variety ofHonda offers a handheld load tester that is perfect for thisThis inexpensive tool is available from any Our Wattage Estimation Guide also provides average wattage for many applications. Appliances frequently list their power requirements in amps. their output in watts. Fortunately, it’s easy to convert from one to the other: Most appliances use 120 volts. wattage estimation guide for a list of 240 volt applications. If you have two of the numbers (e.g. volts, amps) then you can find out the otherThis can help you to determine the rated power that you’ll need

Some appliances require extra power to start up, while others maintain the same To calculate your power needs correctly, you need to know which kind of load you(A load is defined as the device that you are powering.) There are two kinds of loads: Resistive loads are pretty simple:  they require the same amount of power to both start and run the equipment. Many resistive loads are involved in heating or making heat of some kind. Examples of resistive loads include: Reactive loads contain an electric motor, which requires additional power to start, but significantly less power to run once it gets going. is 3 times the amount of power to run the application.    Some household appliances, like a furnace or refrigerator, have internal fans thatExtra wattage/power is needed to start the fan each time. Refrigerators also have a defrost cycle that requires power in addition to the compressor and fans. Reactive loads may also require additional power when the electric

motor begins to work.  For example, when a saw begins cutting wood, its powerThis is not applicable for most household appliances. Some devices are labeled or promoted with a power number. For example, a hair dryerThis means the hair dryer itself produces 1000 wattsBut the amount the hair dryer uses from a power outlet is always more than it produces in heat. This is because the device’s energy use is Another example is a microwave oven. It may be marketed as "1100 watt oven" and indeed produce 1100 watts of cooking power, but it will require more than that For some appliances, you can determine the power needed by looking at the data tag supplied by the electric motor manufacturer. All electrical motors should have a data tag attached to their bodies that give volts, amps, phase, cycles, hp, and sometimes a code. To determine the wattage needed, use Amps x Volts = Watts Generators are often advertised at the maximum wattage they can produce.