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Information guide describing the concept of air flow in residential buildings and its effects on occupants, building durability, and efficiency.

Information guide describing the concept of heat flow in residential buildings.

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

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

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.

Guide describing tools and methods required for accurately measuring airflow with mechanical ventilation.

Information guide describing how to balance air pressure in supply and return ducts of a central forced air system to minimize drafts and help provide consistent temperatures from room to room.

Guide describing how to correctly locate duct terminals to meet the ENERGY STAR Certified Homes program.

Guide describing how to install transfer grilles in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system.

Guide describing how to undercut the doors in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system.

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

HVAC

Building Science Introduction - Air Flow

Building Science Introduction - Heat Flow

Ducted Returns

Existing HVAC System Upgrade or Expansion

Jump Ducts

Measuring Mechanical Ventilation Airflow

Pressure Balancing Supply and Return Ducts in Existing Homes

Quantity and Location of Supply and Return Duct Terminals Match Contractor Balancing Report

Transfer Grilles

Undercut Doors

Whole-House Ventilation Strategies for New Homes

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HVAC