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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.

Kitchen Exhaust Retrofit Duct Guide

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

Blown Insulation for Existing Vented Attic

Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

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

Below Deck Spray Foam Insulation for Existing Roofs

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Air Sealing Bathroom and Kitchen Exhaust Fans

Guide describing how to air-seal bathroom and kitchen exhaust fans.

Bathroom Exhaust Fans

Guide describing how to install a bathroom exhaust fan to remove excess moisture.

Existing HVAC System Upgrade or Expansion

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

Proper Clothes Dryer Venting

Guide describing how to correctly vent a clothes dryer.

Whole House Ventilation Strategies for Existing Homes

Guide describing how to select and install whole-house ventilation systems for existing homes.

Pre-Retrofit Assessment of Ventilation Systems

Guide describing how to evaluate existing ventilations systems before performing home upgrades.

Pre-Retrofit Assessment of Combustion Appliances

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

Whole-House Ventilation Strategies for New Homes

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.

Ventilation and Exhaust Strategies for Multifamily Housing

This guide presents central and individual dwelling unit ventilation and exhaust strategies for multifamily construction.

Mechanical Ventilation for Attached Garage

Guide describing how to install an exhaust fan in an attached garage to pull fumes out of the garage and to depressurize the garage with reference to the home.