As a test of burn times, the owner of Shaver Furnace took the thermostat off his 25 year-old furnace, so that the fire would rage at maximum burn 24 hours a day. 

Yet he still only has to load it every 12 hours. Otherwise he goes as long as 24 hours without reloading it.

A customer just called and told me he goes 18 hours between loads (1/17/08)

Don't believe the hype and misinformation about 42-98 hour burn times. This is only true in the summer.

See my eBay report

• No logs to carry in means no messy ashes and bugs in the house!
• One of the selling points of an outdoor furnace is the convenience of locating it near the
  wood fuel source so you don't have to cart wood all around.
• Safety
  • The chance of carbon monoxide build-up in your home is eliminated.
  • Eliminate allergies by getting the smoke outside!
  • The chance of a gas explosion from your furnace in your home is eliminated.
  • Indoor pollutants of harmful gases and fumes are eliminated too.
  • Eliminates the chance of chimney and flu fires from your furnace.
    
• If you live in a suburban or rural area near a source of cheap wood, you could heat your
  home for the entire season for the cost of one month's electric heat bill. 
• An outdoor furnace requires less tending.
• No inside oxygen is used to fuel the heat like other wood or gas burning units.
• Water heat does not dry up your sinuses and eliminates respiratory problems caused
  by burning wood indoors
• Wood is cheaper than buying it for a fireplace. Instead of 12-18' wood split,
  you can put 30" pieces in this one and full rounds. That makes buying wood even cheaper.
• Designed to work with your existing heating system, be it forced air or a boiler. Works 
  excellent with radiant heat!
• Burning wood, a total renewable resource, is less expensive than other fuels.
• The cost of electric, gas, oil, or propane can be very erratic. The low cost of wood remains constant.
• One unit heats your home, garage, shop, hot tub and domestic hot water.
• The furnace hooks up to any existing hot water or forced air system.

Most people pay for their furnace in 2 years or less! 
Imagine getting a 50% return on your money!
Where else can you get that? An outdoor furnace is the BEST INVESTMENT!

Get the Bugs, Dirt, Wood and Smoke outside. Your lungs will love you and your
Insurance Company will love you too!

Many people are getting 
lower insurance rates.

No more bending over, straining your back to load wood! Lever action latch for easy closing and safety!

A PROVEN design - since 1972!

We feel we build the safest furnace (nothing electrical outside). We have the BEST PRICES and a Very Friendly Staff to help you every 
step of the way.

These furnaces now come with a double flood light on the front, for
ease and safety of loading the wood
at night.

Not only that, it's a MOTION LIGHT!

No switches. No forgetting to turn it off. If it's dark outside and you go
near the furnace, it turns on!

Think the door's not big enough?
 15" round log, 30" long, will weigh 112lb - more than
most people can ever lift! Trust me, the door is more than big enough for anything you can lift into the furnace AND the door frame will take a pounding as you throw them in!

18" x 18"  - The TOUGHEST door you'll ever find with TWO 1/4" solid steel plates separated by a 3" air shield. This plate keeps the hot air in and deflects it off the door. With very little metal to transfer heat to the door it does an excellent job of insulating the door.

Very heavy duty hinges! OURS won't fall off!

Click on Pictures for a Larger image

Having the chimney come down low
and stops the heat, gases and smoke from rushing right out the chimney
AND creates a 2nd burn chamber to
burn off all the gases from the wood!

The removable grate is made out of
3/4" inch bar stock. Now THAT's thick!
We have NEVER had one burn through!

(Most others are 1/2" or less)

Over 100% thicker!

.380" Thick Steel Firebox - ALMOST 4/10 OF AN INCH. WILL NOT burn through - EVER! Will not crack or split like stainless steel!

Compare Firebox thickness to another popular furnace (eBay won't allow us to say their name) at only .125" and another at .1875" thick. Ours is almost .400" ! Over double the thickness!

We have an ash pan! Some other makes don't even have an ash pan!! That makes it HARD to clean out! You have to let the fire die down  or move the burning wood aside to scoop out hot ashes. OUCH!

Only one seam in tube so it doesn't weaken the structure, break or warp. It is made of a solid piece of tubular steel!

It WILL NOT RUST through in a lifetime! Will not get stress cracks
like Stainless Steel!

 We have furnaces 30 years old and more, still in use today!

Actual photo of a fire inside our firebox,
only minutes after reloading with wood!

Firebox size is 36" wide x 34" deep
x 27" high (due to ash pan in bottom). 

It is totally surrounded with 170 gallons of water, top, sides, bottom, front and back, absorbing the maximum amount of heat possible!

The chimney is also surrounded by water, capturing heat that would otherwise be lost!

The ash pan (and hot coals) are surrounded with water too!

CLICK ON PICTURE for a LARGER image

The US Made pump, fan and thermostat
included, have a one-year warranty.

All parts are available everywhere.
There are NO proprietary parts
or circuit boards!

Comes STANDARD with TRIPLE Hookup for heating a Home AND a shop / garage / apartment AND potable domestic Hot Water too!

NEVER run out of hot water again!

CONSUMER REPLACEABLE  and cleanable Potable Water Coil (50 foot long copper coil) carries hot water, heated by the water reservoir directly to your hot water heater. We show you how! No separate heat exchanger is needed!! This saves you up to $200.00 

Again, this is potable (drinkable) water.

Pumps run on demand NOT 24 hours
a day like others! 

There are legs on the bottom with the siding surrounding the bottom to ground level.

We use state-of-the-art Solar Guard insulation all around the water jacket!

Solar Guard is only 1/4" thick but combines a thermal break, reflective insulation and an insulating layer of R11.6! It has backing on both sides and is aluminum foil backed on one side. We then insulate on top of that with R11 vinyl-backed fiberglass in the walls and ceiling! 

TRIPLE INSULATED (R50) ON TOP - like a passive Solar house. You cannot feel the heat when you touch the siding!

That gives you R22.6 in the walls and now R50 in the ceiling!

http://www.silvercote.com/solarguard_reflective_insulation.php

http://www.silvercote.com/PDF/solarguardspec.pdf

The ash "pan" area is approx. 16" wide x 34" long and is 8" deep. It is a non-removable ash pan because it is easily cleaned at the front, through the door
with a small shovel or hoe.

WARNING! Some other makers don't even have an ash pan! You have to let the fire die out or shove the hot burning logs aside - then clean it out while the firebox is 700 plus degrees - and then restart the fire in the dead of winter! Who wants to do that?

Water surrounds the front and back of the firebox and the ash pan as well, extracting all the heat from the red hot coals.

The chimney is low on the firebox and exits about 1 foot from the bottom, so that the smoke - or more importantly, the gas and heat - is trapped so that it doesn't quickly escape out the flue. That would be a big loss of efficiency. This is also a better idea since you don't have hard to clean baffles getting a creosote buildup on them.

This also creates a 2nd burn chamber, to more completely burn the gases and wood! When wood starts to burn it's the gas that burns first!

Another advantage is that the chimney exits through the water, further heating it up - for free! Nothing does better!

170 gallon tank!

Many manufacturers only use 70-125 gallon tanks! The size is critical when heating a larger home. 

DON'T BELIEVE it when they say they can
heat 4,000 sq. ft. and have 300,000 BTU.

That's scientifically impossible without heating
the water to over 300 degrees!

We can heat a house with a water temperature of just 130 degrees as opposed to 160-180 degrees in a competitor's with a smaller tank. Larger tanks also allow faster recovery and heating - plus a reserve.

Our furnace can be adjusted with the thermostat to between 130F and 180F.

Water tank is made from 1/8 thick metal (11 gauge) - 2 times thicker than many others using only 16 gauge.

1/8" is the standard in the water tank industry for any water tank.

< There is an air handler/blower that feeds air into the firebox, below the grate, to feed oxygen to the fire. It is thermostatically controlled to keep the water at a set temperature that you can adjust. This takes place of a manual draft opening.

Our furnace is so strong and well-made,
that the chimney alone is strong enough
to carry even our 2600 lb. weight of
our biggest furnace!

We move them like this every day!

Exterior is made of Heavy Duty Siding - 29 gauge structural quality, full-hard steel. 10 layers of protective coating. It has a Lifetime film integrity Warranty for walls and roof and a 30-year warranty against fade and chalk. 10 year edge rust warranty against acid rain.

 20 colors to best suit your surroundings! Mix and match the roof, sides and corners.

There are legs on the bottom with the siding surrounding the bottom to ground level.

The chimney is made out of 1/4" thick, solid steel pipe and is surrounded by water. It tops out at about 90" feet above ground. You can EASILY add 6"
regular stovepipe extension(s).

Click on Picture for a larger image. Shown without door

All have double pump hookup. 
One pump comes with the furnace.

Does anyone else
give you a pump?

Extra Large rear access door. All electrical items are in back, safely behind a huge door! 

Easy water and electrical hookups. No special tools needed.

The easiest furnace for the self-installer to put in!

We help you every step of the way!

Click on Picture
for a larger image

The blower in the back is a great aid
in getting a fire started. It also recovers
the water temperature much quicker,
and burns the wood up more completely
because oxygen is being fed to
the bottom of the flame - 
like blacksmith feeds his fire!
 

The air blower determines how hot the fire burns and therefore how hot the water gets. A thermostat on the back of the water jacket tells the blower when to turn on and off, so it doesn't run all the time and waste wood.

This is a LOT more efficient than a manual damper!

The air blows into the bottom of the fire, through the grate! That's better than blowing in from the front - into the side of the fire, as all others do.

You get more complete burning from a fire where the oxygen is fed through the bottom as opposed to blowing over the fire from the side, like others that have that big box on the door!