Heat loss is the transfer of indoor heat to the outside through walls, windows, roofs, floors, and air leaks. It increases heating demand and energy costs, especially in colder climates. Reducing heat loss with insulation, air sealing, and efficient windows improves comfort and efficiency.
/hiːt lɒs/
Heat loss is the transfer of indoor heat to the outside through walls, windows, roofs, floors, and air leaks. It increases heating demand and energy costs, especially in colder climates. Reducing heat loss with insulation, air sealing, and efficient windows improves comfort and efficiency.
Why does heat loss matter for HVAC?
It drives heating demand and system sizing, directly affecting energy use and comfort.
Source: The Cooling Company
Insulation and air sealing reduce heat loss and heating costs.
A homeowner upgrades attic insulation and seals drafts, lowering heating bills and eliminating cold spots.
An energy audit can pinpoint the biggest heat loss areas and prioritize fixes.
“An energy audit can pinpoint the biggest heat loss areas and prioritize fixes.”
Older homes can lose 25–40% of heat through the roof and attic without proper insulation.
What causes the most heat loss in a home?
Attics, windows, and air leaks are often the biggest sources.
How do I reduce heat loss quickly?
Seal drafts, add insulation, and upgrade to efficient windows.
Does heat loss affect HVAC sizing?
Yes. Higher heat loss requires larger heating capacity.
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