Manual J Residential Load Calculation (8th Ed.)
MJ8 produces equipment sizing loads for single-family-detached homes, small multi-unit structures, condominiums, town houses and manufactured homes. This new version incorporates complete MJ8-AE volume in a user friendly format.
MJ8 also accommodates homes that have exceptional architectural features and life style accessories such as:
•Dwellings that have limited exposure or no exposure diversity
•Homes with large south-facing glass area or rooms with unusually large glass area
•A thermally isolated solarium
Customized internal load estimates MJ8 is sensitive to an increased variety of issues related to construction materials and methods including:
•Fenestration loads for glass rated by the National Fenestration Rating Council (NFRC)
•Improved duct load models
•Improved methods for estimating the effect of internal and external shading devices, including insect screens
•Inﬁltration estimated based on blower door test
•Sensitivity to latitude and altitude
•Sensitivity to skylight glazing material, curb construction and light shaft construction
•Heat gain sensitivity to rooﬁng material, roof color and the use of radiant barrier
•Heat loss and gain for log walls, structural foam panels, aerated autoclaved concrete block, insulated form concrete panels, brick walls, concrete walls, wood foundation walls, and any other types of walls and insulation options.