Add-on wood furnace (downstream series)

Heating · Furnaces and Boilers · printed page 178 (PDF page 179)

Original page Sign in to save

Book index entries

Add-on Wood Furnace (Downstream Series)Add-on – Downstream Series (Downstream Series) – Add-on Wood Furnace

Text in the illustration

return
an add-on wood furnace should always be installed downstream of the main furnace so that the main furnace won't overheat
this is one common method of installing an add-on furnace
oil furnace
supply
add-on wood furnace

Generated explanation

The illustration shows an oil furnace and an add-on wood furnace connected in a downstream series arrangement. Return air enters the main oil furnace, and a connecting duct carries its discharge air downward into the add-on wood furnace. Air then leaves the wood furnace through its upper plenum and supply duct, as indicated by the airflow arrows. The annotation specifies that the wood furnace should be downstream of the main furnace to prevent the main furnace from overheating. An oil burner is shown on the main furnace, while the wood furnace has a front loading door and a small control linked to the door area.

Components

oil furnace add-on wood furnace oil burner return air duct connecting duct supply air plenum supply air duct wood furnace loading door wood furnace draft control

Materials

sheet metal ductwork metal furnace cabinets

Related illustrations

1031

Wood furnace not downstream

· p. 178

The illustration shows an add-on wood furnace connected in series upstream of an oil furnace in a forced-air heating system. Return air enters the wood furnace, and arrows indicate airflow through connecting ductwork tow

1030

Add-on wood furnace (divider plate method)

· p. 178

The illustration shows an oil furnace connected in series with an add-on wood furnace using the divider plate method. Return air enters above the oil furnace, and arrows show air routed downward through connecting ductwo