Product Details Manual J 8th Edition is the national ANSI-recognized standard for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, ...

Load calculation is a detailed, precise method of calculating the size of cooling system that is ideal for your home.

How do you know if your AC system is the correct size for your home? Jon Wayne Service Company, a hometown expert, shows us how with a manual J load calculation. Take a look to learn more!

Manual J 8th Edition is the national ANSI-recognized standard for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, town houses, and ...