Heat circulators

Heating · How They Work · printed page 191 (PDF page 192)

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Book index entries

Heat Circulators Heat – Circulators for Fireplaces Wood Fireplaces

Text in the illustration

heat circulators (heatilators) use masonry channels or a crude duct system to draw cool room air up and across the outside of the firebox
the air is warmed and then flows out through vents typically located at a level above the top of the firebox
air circulation may be by electric blower or natural convection
warm air out
cool air in

Generated explanation

The illustration shows a masonry fireplace with two lower air-inlet grilles and two upper warm-air outlet grilles flanking the firebox. Blue arrows indicate cool room air entering the lower grilles, and red arrows indicate warmed air returning to the room through the upper grilles. The annotations explain that masonry channels or ducts carry air up and across the outside of the firebox to absorb heat. Air circulation may be driven by an electric blower or natural convection, although the internal passages and blower are not shown. A masonry hearth extends in front of the firebox.

Components

fireplace firebox brick fireplace facing hearth extension cool-air inlet grilles warm-air outlet grilles fireplace heat circulator

Materials

brick mortar masonry metal grilles

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