Shelter Furnace SF3048, User Manual

3

General 

Information 

ALWAYS KEEP YOUR WOOD COVERED YEAR ROUND; DRY WOOD WILL PRODUCE MORE BTU OUTPUT AND LONGER BURN 

TIMES.
The Shelter Furnace is an airtight central solid fuel outdoor furnace engineered to accommodate the heating requirements of the average 

sized home, even during winter’s coldest months.  It is constructed of high grade, heavy gauge steel and is continuously welded to assure 

the utmost in structural strength.  The insulated firebox will accommodate a log up to 34 inches in length.  In addition, the heat exchanger 

is lined with firebrick to ensure many years of energy efficient service.

The design of the secondary combustion chamber increases fuel efficiency by creating a “secondary burn” of smoke and wood gases 

before they are vented up the chimney.  By sending the gases back through the secondary combustion chamber, less fuel is wasted, the 

furnace burns at a higher efficiency, and for longer burn times.

The cast iron door is custom fitted to provide an airtight seal, greatly extending the burn time and ensuring maximum efficiency in fuel 

consumption.  The heavy-duty cast iron grates aid in convenient ash removal and reduce maintenance; the insulated wrap-around sides 

are designed for maximum heat transfer.

For total comfort and convenience, a thermostatically controlled 1800 CFM circulation blower system has been installed.  The blower 

draws the cold air from the home, across the heat chamber before going through the hot air duct and returning the warm air to your home.

This fully automatic blower furnishes rapid heat disbursement to your home, minimizing recovery time.  Average burn time per load of 

fuel is 6 to 12 hours depending on wood or coal type and condition, desired temperature within the home and amount of fuel.  We have 

incorporated all of these features as standard equipment, offering you the most efficient, durable and affordable appliance possible. 

Abnormally cold weather could reduce the burn time.

Your Shelter Furnace is designed to be either a supplemental or central heating source for your home. This wood and coal burning 

furnace may be installed in parallel with a properly operating electric, gas or oil-fired central furnace, listed or certified in accordance with 

a nationally recognized safety standard, and within clearances specified on Shelter Furnace nameplate. When in a parallel installation the 

static pressure of the central furnace plenum may not exceed 0.15 water column inches and the maximum setting on central furnace limit 

switch is 182°F. With the Shelter Furnace in an “Interconnection Arrangement” your furnace should be upstream of the central furnace. 

The Shelter Furnace warm air supply should never be connected to return air for the central furnace. A qualified installer should perform 

the installation.
This is a wood and coal burning furnace – it cannot be turned “off and on” to control the furnace temperature like gas or electric furnaces.  

Once the fire is established, it has to burn until it burns itself out.

INCLUDED WITH YOUR SHELTER FURNACE:

1– 10” starter collar

1 – 12” starter collar for cold air return

1 – owner’s manual with warranty card

1 – electrical control kit (shipped on top of furnace)

1 – tube of high-temp silicone caulk

ELECTRICAL CONTROL KIT PARTS:

6 – 1/4”-20 bolts

2 – 1/4” nuts

23 – #10 green screws with rubber gasket for blower housing cover

4 - #10 x 3/4” screws for fan limit control box

1 – draft blower

1 – cover for fan limit control

1 – fan limit control with wire conduit

1 – blower motor and housing

1 – electrical control box

1 – wall thermostat (you must purchase 2-wire thermostat wire 

      separately)

1 - #10 x 3/4” screw for conduit clip

1 – blower housing cover

1 – blower housing bottom

4 – U nuts for blower housing

2 – #10-32 machine screws

2 – #10-32 nuts

4 – #10 x 3/4”screws for chimney anchor plate

1 – anchor plate

1 – spare fuse link

3 – 1/4” x 20 x 3/4” bolts