When you’re installing a new HVAC unit, it’s important to make sure the unit is correctly sized.
Every family is unique and each home is diverse, which is why each family has distinct design needs for their home’s heating and cooling system. Our technicians adhere to industry standards written in ACCA‘s design manuals. Room-by-room heat loss and heat gain is a calculation heating and air conditioning technicians use to address the energy and comfort needs of your home before you buy a new heat pump and air conditioner. Keep your family comfortable by installing the unit correctly.
What is a room-by-room
heat loss and heat gain?
- “With cooling and heating equipment, a larger-sized product is intended to meet the needs of a larger sized area. However, if the equipment is too large for your home, you will experience increased costs and less comfort. Oversized equipment will operate in short run time cycles, not allowing the unit to reach efficient operation or deliver even temperatures throughout the home. Don’t assume that the size of your new system will be the same as your old equipment. Changes, such as additions or insulation improvements, may have been made to the house since the original equipment was installed; or heating equipment by using Manual J or an equivalent calculation tool. Ask about it.” Source: EPA Energy Star Guide to Efficient Cooling and Heating
- “To be sure of correct sizing, choose a contractor who agrees to take the time to calculate heating needs using an industry standard calculation, such as found in the Air Conditioning Contractors of America’s Manual J. Such calculations take into account the climate, along with the house’s size, design, and construction.” Source: Consumer Reports “A guide to choosing furnace size, efficiency and features”
- “Sizing Heaters and Air Conditioners: Quick but Inaccurate Methods. The following are some of the “quickie” methods some contractors may use to size a system. NEVER use any of these to determine the final size. The contractor walks into the house, looks at the existing unit, and recommends that the replacement unit be the same size, or larder. This obviously does not take into account any improvements made to the house or mistakes made in sizing the original unit.” Source: US Department of Energy
Using technology to correctly size a new HVAC unit
Improperly charging of air conditioning units will reduce their efficiency performance. “A 20% undercharge resulted in a 21% reduction in SEER while a 20% overcharge products an 11% reduction in SEER.” Source: Texas A&M University, An Evaluation of Improper Refrigerant Charge on the Performance of a Split System Air Conditioner with Capillary Tube Expansion
During the HVAC installation
Using nitrogen during installation prevents oxidation from forming within your refrigeration on lines that can lead to poor system performance. “It is good practice to purge an inert gas such as oxygen free nitrogen to prevent oxides (scale) forming on the inside of the pipe.” EPA Source.
If you would like to have a technician come out to do a room-by-room heat loss and heat gain in your home, call our office today to schedule an appointment.
Kingsport (423) 239-3147
Johnson City (423) 282-4983
Bristol (423) 764-0126