UPDATED: August 9, 2021 at 11:38 AM CDT Poor heating of rooms in homes equipped with warm-air furnaces can sometimes be traced to heat loss through uninsulated or poorly sealed air ducts.

One very important note: Never place duct or pipe insulation within 3 feet of the heating system, exhaust flues, or any other high temperature areas.

While heat pipes may have been insulated with fiberglass from the 1960s, with air movement through gaps in the pipes, that insulation is of little effectiveness, we now know.

Home maintenance tips on insulating heating ducts in tight spaces and blocking the draft from a bow window from Handyman on Call columnist Peter Hotton.

Heating rooms far from furnace requires duct examination Published: Oct. 30, 2007, 2:59 a.m. By Zolton Cohen | The Grand Rapids Press ...

In most pre-1975 heating systems, the plenum and ducts are made of sheet metal. The ducts are rigid, and if they have any insulation it's been taped or strapped on after they were installed.

“In fact, for retrofit projects, duct sealing can allow for downsizing to a smaller, less costly heating and cooling system,” he said. “Research shows that up to 40 percent of the air being supplied ...

Fiberglass wall insulation or duct insulation with foil facing, sold in rolls, can also be used to insulate water heaters. Both types of insulation are available at some home centers and building ...

Placing insulation around the ducts that carry air to and from your heating and cooling systems can improve their efficiency by as much as 20 percent. Just be sure to plug air leaks along the ...

Pull back attic insulation to find and seal cutouts in drywall for electrical fixtures, pipes, fans and outlets. Also check wiring, chimneys, flues, vent stacks and ducts, and seal them on the inside.