Tempo:
illustrates a typical heating layout, and Figure 162 shows an isometric view of a typical heating system. Work with the heating contractor early in the framing process to map out the location of the furnace, venting system (if needed) as well as the supply and return air branches, trunk ducts and plenums. If space is provided through and around floor joists and wall framing, and if any additional supportive framing needed as construction proceeds is planned, far less cutting and repairs will be required later to accommodate the air distribution system.
Furnaces Furnaces heat houses by transferring the heat produced from burning natural gas, propane or oil, electric elements, or hydronic coils to air that is distributed throughout the house and circulated within each room by a supply and return duct system. Furnaces are controlled by thermostats installed in a central location. Today, furnaces tend to be quite compact, lightweight, and are easily installed in the basement or crawl space, or in purpose-built service rooms.
162 Isometric view of forced-air heating system baseboard return air grille wiring from relay control box extended to thermostatic wall control outlet generally located 1.2 m (4 ft.) off first floor level
return air—one or two joist spaces with bottom and end boxed in with sheet metal
furnace wiring extended to emergency switch box normally fixed to underside of floor joists at bottom of basement stairs
flue pipe relay control box heating unit warm air supply
electrical conduit fastened to heating unit
warm air takeoff floor joists supply trunk strap supports
Note: Maintain clearance between conbustible materials and heating appliances in accordance with manufacturer’s instructions
Furnaces Furnaces heat houses by transferring the heat produced from burning natural gas, propane or oil, electric elements, or hydronic coils to air that is distributed throughout the house and circulated within each room by a supply and return duct system. Furnaces are controlled by thermostats installed in a central location. Today, furnaces tend to be quite compact, lightweight, and are easily installed in the basement or crawl space, or in purpose-built service rooms.
162 Isometric view of forced-air heating system baseboard return air grille wiring from relay control box extended to thermostatic wall control outlet generally located 1.2 m (4 ft.) off first floor level
return air—one or two joist spaces with bottom and end boxed in with sheet metal
furnace wiring extended to emergency switch box normally fixed to underside of floor joists at bottom of basement stairs
flue pipe relay control box heating unit warm air supply
electrical conduit fastened to heating unit
warm air takeoff floor joists supply trunk strap supports
Note: Maintain clearance between conbustible materials and heating appliances in accordance with manufacturer’s instructions
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