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Guide outlining how to correctly install flex ducts without excessive coils or loops.

Guide describing how to install jump ducts in bedroom walls to balance air pressures between rooms, enabling constant air flow for conditioning and freshness even when room doors are closed.

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

Guide describing design and installation of compact duct systems for central heating and cooling systems.

Guide describing how to install ducted returns in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

Guide describing how to conduct duct leakage tests per RESNET protocols.

Guide describing condensing boilers and hot water heat distribution systems used for home heating.

Guide describing how to analyze boiler and building performance and install thermostatic radiator valves (TRV) to reduce temperatures in over heated spaces.

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

Guide describing best practice venting strategies for existing steam heating systems in multifamily buildings.