How to Figure Out What Size Heating or Cooling System You Need…

The size of your cooling system matters. If your cooling system is too large or too small it will adversely affect your comfort and budget. Make sure you HVAC company is suggesting equipment that is adequate for your home by giving you a room-by-room load calculation and designing a duct system that will maximum the efficiency of your new Northern Kentucky HVAC system.

Wrong Sized Cooling Systems Cause Problems

If your cooling system is too small, you won’t be able to keep your home cool where and when you want it to be cool. If your cooling system is too large then the air inside your space may become muggy since the system doesn’t have to run long enough to dehumidify.  You will also see a shorter lifespan for your equipment due to constantly having to turn on and off.

Figuring Out the Right Size Cooling System for Your Property

Many  HVAC contractors rely on general rules of thumb to determine what size of cooling systems to install because true HVAC load calculations require a lot of time and attention to detail. The rule of thumb is that a system needs one ton for every 500 to 600 square feet of floor area but this leave out a bunch of information that is needed to properly figure how large a cooling system is needed.  For example… a house with the same floorplan as another but rotated 90 degrees could have a difference in its cooling load of 25% or more.

Manual J Calc and a Computer to the Rescue

The Air Conditioning Contractors of America (ACCA) have developed “Manual J” as a way to correctly figure out the size system a particular property needs. Before computer programs were available these calculations needed to be figured by engineers and that’s why some HVAC installer started using rules of thumb. First an HVAC service person needs to collect the home’s orientation, insulation levels, window types, areas of all the surfaces that gain or lose heat, and more. All this information will result in a computer telling you the cooling and heating needs of your property in terms of Btu per hour for each room and the property as a whole.

Beware: The Old Rules of Thumb Don’t Work for New Construction or High Performance Homes

Newly constructed homes on average need 1 ton of cooling for each 800 square feet of floor space and high performance homes get 1,500 to 2,000 square feet per ton. The result is HVAC companies operating behind the times will consistently install systems that are way oversized for the new properties they trying to cool and heat.

Phoenix Comfort can make sure your HVAC equipment is the right size for your property.

Contact us (859-918-5400) for a Consultation!

About Phoenix Comfort Systems

Phoenix Comfort provides a full range of air conditioning and heating repair, installation, and maintenance services for residential and commercial customers. We keep your air conditioning and heating systems in their best condition and ready to go when you need them most, following the industry’s “best practice” methods and standards. Phoenix Comfort carries a full line of quiet, energy-efficient Tempstar air conditioning and heating equipment.
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