ENERGY KING 385EK, Installation, Operation & Maintenance Manual

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Rev 03/12/14 ENERGY KING
®
385EK Wood/Coal Furnace Owner’s Manual  U. S. 21
Installation
Air Duct Installation
The duct or air distribution system circulates heated and/or cooled air to all the conditioned rooms in
a house. They must be properly designed and installed to be efficient, maintain uniform
temperatures throughout the house, and not adversely affect comfort or indoor air quality.
Important duct system installation details for safe and efficient operation of your ENERGY KING
Wood/Coal Furnace:

Every ENERGY KING Wood/Coal Furnace
must be installed with a cold air return. Cold
air returns must be equal in size to the
heated air outlets, and preferably 10% larger.

The plenum must be constructed of metal
(minimum 28 gauge galvanized is
recommended) and must be installed in
accordance with NFPA guidelines.

The plenum should be 18 inches by 18
inches for the models 385EK.

The plenum must be no closer than 2 inches
from the ceiling or any combustible material.
This clearance is critical during a power
outage since excessive heat buildup in the
plenum top may be dangerous.

When connecting the plenum to your warm-
air-supply duct system, never supply less
than 150-square inches of constant heated
air outlet area.

The warm-air-supply duct system must be
constructed of materials with a minimum
temperature rating of 250 degrees
Fahrenheit.

The ducts, fittings and registers should be
sized so that the total external static
pressure does not exceed 0.2.

Ductwork clearance requirements vary.
Contact your local building or fire officials
about installation restrictions and inspection
requirements in your area. Ductwork
installation must conform to local, state, and
national codes and regulations.
Do not connect the ENERGY KING heating appliance warm air
supply outlet into the cold air return inlet of the central
furnace. The components of the central furnace could overheat
causing the central furnace to operate other than intended.