Manual J Residential Load Calculation - 8th Edition - Full Author:Hank Rutkowski 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 manufactured homes. This new version incorporates the complete Abridged Edition of Manual J. The manual provides quick supplemental details as well a... more »s supporting reference tables and appendices. A proper load calculation, performed in accordance with the Manual J 8th Edition procedure, is required by national building codes and most state and local jurisdictions.« less