North Carolina Heating Group 1 Contractor: Manual J Residential Load Calculation (8th Ed.)
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Manual J Residential Load Calculation (8th Ed.)

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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
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