This article appeared in the Nov/Dec 2020 issue of This Old House Magazine. Click here to learn how to subscribe.
In fact, the opposite is true. Shutting down the flow of heated or cooled air to a room increases pressure (known as “back pressure”) in a forced-air system, so the blower has to work harder, using more electricity.
A better move: Ask your HVAC pro to create more zones by adding motorized dampers to your ductwork. Or install smart registers, such as Ecovent. These battery-powered devices automatically open or close as needed to maintain a set room temperature, while monitoring backpressure and communicating with one another wirelessly to balance airflow. Ecovent says a typical system costs about $1,200, delivers average energy savings of 25 percent, and could pay for itself in about three years.
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Posted by: Kate Putnam
JAEGER USA, Inc.
198 Pickering Road
Rochester, NH 03867 USA