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Wrong – These flex ducts are pulled taut, which is correct but they are inadequately supported with straps that are spaced too far apart and are too tight causing pinching of the insulation and turns are sharp rather than gradual.

Guide describing the retrofit of kitchen exhaust systems, including duct sizing and routing considerations.

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

Guide describing how to upgrade or expand an existing HVAC system.

Information guide describing things to consider before attempting retrofits including any combustion appliances, or that may affect them.