How to Create Zones in a Forced-Air HVAC System | This Old House

This Old House plumbing and heating expert Richard Trethewey shows how to control the temperature to every room of the house. (See below for a shopping list and tools.)

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Richard helps a California homeowner get room-by-room control of her forced-air heating and cooling system by installing a new type of "zoning" controller. The system works by inflating "dampers" that are installed in the registers of each room in the house. These dampers are thermostatically controlled to inflate or deflate and block air flow in each register, depending on what temperature each individual room's thermostat is set at.

Shopping List for Creating Zones in a Forced-Air HVAC System:
- pneumatic damper system
- electric suction fan
- male duct fitting and flexible duct

Tools for Creating Zones in a Forced-Air HVAC System:
- metal snips
- screwdriver
- drill/driver
- utility knife
- foam-rubber blocks and plastic trash bags, used to temporarily seal registers
- plastic grocery bag and monofilament fishing line, for snaking air tubes through ducts

The "MyTemp" system that Richard helped install is manufactured by Home Comfort Zones, Inc. [bit.ly/3pyYcix]

Expert installation assistance was provided by Air Plus Heating & Cooling [airplusmechanical.com/].

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How to Create Zones in a Forced-Air HVAC System | This Old House
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