Manual J is the industry standard residential load calculation method,
required by most building codes around the country. Newly revised and expanded,
the eighth edition procedures produce improved equipment sizing loads for
single-family detached homes, small multi-unit structures, condominiums, town
houses and manufactured homes. These procedures are also compatible with
different types of comfort systems and applications such as:

A central single-zone comfort system

A central multi-zone system

A distributed multi-zone system

Dwellings that have limited exposure or no exposure diversity



More about Manual J 8th Edition:

MJ8 also accommodates homes that have exceptional architectural features and
life style accessories such as:

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 estimation 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 to roofing material, curb construction and light shaft
construction

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 many other types of walls and insulation options

NOW WITH NEW SOFTWARE: Each copy of MJ8 includes a demo CD containing software
that demonstrates how a load calculation is performed using MJ8 as well as a
fully-functional spreadsheet that makes it easier to learn and apply the Manual
J method.