EPA Indoor AirPlus

Guide describing refrigerant-based compression-cooling air conditioning systems for space cooling.

Guide describing combustion furnaces with selection and installation guidance.

Guide describing sizing methods for cold climate heat pumps.

Guide describing the split system heat pumps used for central forced air heating and cooling.

Guide describing ductless heat pump systems used for single-room or whole-house heating and cooling.

Guide describing sizing and installation of foundation heat exchangers, which can be connected to a heat pump system used for spacing conditioning as well as domestic water heating.

Guide describing options for adding dehumidification equipment to a home to maintain indoor relative humidity below 60%.

Guide describing the use of building cavities as supply or return ducts.

Guide describing removal of construction debris from flex ducts and protection of ducts and HVAC equipment during construction to keep them free of dust and debris.

Guide describing how to air seal and insulate flex ducts.

Guide describing how to air seal and insulate metal ducts.

Guide describing how to air seal and insulate fiber board ducts.

Guide describing how to air seal around duct shafts and flues installed through ceilings, walls, and flooring in new and existing homes.

Guide describing how to design HVAC systems to be located within the conditioned space of the home, either in a utility closet or in an attic, basement, or crawl space.

Guide describing the use of ducted returns to return stale air from bedrooms and bathrooms to a central heating system.

Guide describing method for installing ducts in a duct chase in a dropped ceiling.

Guide describing method for designing and installing ducts in a raised ceiling chase.

Guide for designing and installing interior ducts in an interstitial floor cavity in new and existing homes.

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

Guide describing method for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls.

Guide describing how to insulate a basement to improve the overall thermal performance of the building and provide more dry, usable conditioned space for home occupants and HVAC equipment.

Guide that illustrates how and when to encapsulate ductwork in unconditioned attics, increasing the R-value of duct insulation, mitigating condensation issues, and reducing air leakage.

Guide describing how to install jump ducts in bedroom walls to balance air pressures between rooms, enabling stale air to return of the central air handler, even when room doors are closed.

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

Guide presenting central and individual dwelling unit ventilation and exhaust strategies for multifamily construction.

Guide describing how to install obvious ventilation controls for continuous and intermittent exhaust fans used for whole-house ventilation.

Guide describing how to install ventilation air inlets in open locations at a safe distance from potential air contamination sources.

Guide describing proper sizing and installation of high-MERV furnace and air-handler filters.

Guide describing the uses, selection process, and specification of high-MERV filters.

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

Guide describing the bathroom exhaust fan ENERGY STAR rating requirements.

Guide describing how to install an efficient kitchen exhaust fan.

Guide describing airflow control strategies for elevator shafts, corridors, stairwells, and trash chutes in multifamily buildings.

Guide describing how to correctly vent a clothes dryer to direct exhaust air out of the home.

Guide describing proper sizing and installation of high-MERV furnace and air-handler filters.

Guide describing the uses, selection process, and specification of high-MERV filters.