An easy to learn, teach, and apply Manual J8. MJ8AE, an abridged version of the Eighth Edition of Manual J, provides complete instructions for estimating heat loss and heat gain for residential structures. MJ8AE is sufficient for learning the Manual J procedures and for undertaking hand calculations on a varied number of home applications.
New homes, homes that had significant upgrades/modifications, or homes that have non-standard design elements (i.e., NFRC labeled glass, large glass areas, atrium's, excessive internal loads, heat recovery systems, etc.) should use the comprehensive procedures of the unabridged version of Manual J8.
: Air Conditioning Contractors of America (ACCA)