TANKLESS WATER HEATERS
The Aquastar Instant Gas Water Heaters
cut fuel consumption 20% to 50% by heating water only as it is used. They have
copper heat exchangers, and the burner is stainless steel. These use a
combustion vent pipe out through the roof just like a gas tank type heater.
The Aquastar/Bosch, 30
psi for full performance.
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THERM TANKLESS WATER HEATERS manufactured by Bosch
BOSCH/THERM 520/1600 models are a good home size for
1 user at a time. The heater is activated by
a flow speed of 1/2 gallon per minute. Maximum flow rate is 4 gpm at 45 degree increase,
to 2 gpm at 90 degree increase in water temperature. Ask us to send factory literature.
The 520PN and 1600PS models have a standing pilot. The
1600PS (for use with pre-heated water) has an exit thermostat.
Its temperature is
controlled to constant output despite varying incoming temperature. Useful if
you have pre-heated water from a wood stove or solar water heater. The 520HN
unit uses a water pressure generated spark ignition, no pilot light.
2 year warranty with 12-15 year warranty on heat exchanger.
VERY Small Cabin model = Bosch Pro Tankless GWH
330PN. A bit smaller but able to deliver 2.6 gpm with 45 degree
temperature rise up to 1.3 gpm at
a 90 degree
rise. This unit accommodates limited hot water for one user at a time.
Per the manufacturer, all models have a
minimum 30 psi requirement.
ALL WATER HEATERS SHIPPING $28 IN 48 STATES, UPS
Due to size, 30 day return privilege does not apply to this item.
WOOD FUEL WATER HEATER
CHOFU HOT TUB HEATER
Stainless Steel, Wood Fired
Includes Connecting Fittings For Tank
1 year warranty
This Chofu model is a precision built wood-burning water heater designed
specifically for hot tubs. It circulates water using the principal of
thermosiphon (the pumping action created by rising hot water), eliminating the
need for a circulating pump or electricity. This unique feature opens up a whole
new range of possibilities for alternative hot tubs. Now you can have a basic
soaking tub without pumps, chemicals, or high maintenance. With the Chofu heater
you can retrofit an existing tub or put together a low-cost soaking tub, using a
wooden tub or stock tank.
The stove body of the Chofu is made with high quality stainless steel, grade
(316), so it can be used outside, without worry. And since the firebox is also
made of stainless steel, it will withstand years of service without danger of
burning-out. The smoke outlet on the Chofu features a unique vented collar that
provides secondary combustion of unburned gases, for reducing smoke emissions
and chimney sparks.
The Chofu utilizes a sophisticated heat exchange design for efficient water
heating. The stainless steel stove body surrounding the firebox is a
double-walled water-jacket with a 1-inch space between, making the entire
firebox (except the front) a heat-transferring surface. Additional heat transfer
takes place in a water-filled baffle plate that runs horizontally through the
firebox. The baffle deflects the path of the fire, so it gives up more heat into
the water jacket before going up the chimney.
The Chofu will connect to any tub using accessories provided
(see connection kit):
flexible neoprene tubes, stainless steel pipes, and thru-wall tub ports.
(Thickness of the tub wall must be specified to determine the length of
Installation requires these four basic steps:
(1) Preparing a brick or cement foundation next to the hot tub to receive the
(2) Cutting 1 7/8-inch holes in the side of the tub wall for thru-wall ports.
(3) Installing pipes to connect heater and tub.
(4) Installing the stove pipe, (8 feet recommended)
The Chofu operates like a conventional wood stove, achieving its fastest heating
rate from dry hardwoods. It uses 17-inch wood with an 18-inch x 14-inch x
14-inch firebox. The most efficient heating comes from using 17-inch x 1
1/2-inch x 1 1/2-inch wood, loaded at 45 min. intervals.
The Chofu has a high and low speed draft control to regulate the heating rate.
It operates with the draft wide open for fast heating, and closed down to
maintain temperature once the water is hot.
• High grade stainless steel stove body
• 1/8-inch steel stove front
• Heavy cast iron door and grates
• Hot Tub Connection kit (see photo)
• Generous size firebox, 18"L x 14"W x 10"H
• Vented smoke-outlet for secondary combustion.
• 3/4-inch drain for freeze protection.
• An ash drawer for easy removal of ashes.
• A long handled ash rake
• Dimensions: 16" wide x 23" long x 18" high
• Weight: 59-lbs.
• Stove body: Grade 316 stainless steel, inner wall 20-gauge, outer wall
• Stove Front: 1/8-inch steel
• Firebox door and grates: cast iron
• Firebox dimensions: 18"L x 14"W x 10"H
• Heat exchange surface area: 9 sq. ft.
• Smoke outlet: 4 5/8-inch (reduced to 4-inch)
• Circulating pipes: 1 3/4-inch O.D.
• Drain: 3/4-inch I.D.
Heating Rate Information
Although the heating rate is variable depending on dryness of wood,
frequency of loading, etc., the average heat output of the Chofu CHS is 32,000
BTU’s. A 200-gallon tub can be heated at approx. 20ºF per hour.
Note: The heat output of the Chofu increases after an initial 45-min.
warm-up period that heats the stove body and establishes a bed of coals.
55ºF to 105ºF
1 1/2 hours
2 1/2 hours
3 1/2 hours
4 1/2 hours
Not for pressurized water, 10 psi maximum water jacket.
4" x 2' sections of Stainless steel stove pipe and a finishing cap are also
available. A minimum of 8' of the 4" stove pipe is required to create sufficient
draw and firebox heating. The cap will make the pipe stack a bit top heavy and
therefore requires some stack support. Ideally you would utilize 5 sections of
pipe with the cap for proper draw but 4 sections will work. The cap is a very
good idea in any area where a fire danger may exist.
|A-CHOFU: 63 pounds
|A-CHOFU PIPE: 2' section,
|A-CHOFU SHANKS: extra long shank
ports for connecting Chofu to tubs with walls
that are 3/8" - 1 5/8" thick
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Since 1986, SUN OVENS have been being
used around the globe to provide true solar cooking to
countries around the globe. Even though it is called an
oven, food can be boiled, steamed, roasted or baked at
cooking temperatures of 360° F / 182° C, making it ideal
for cooking a wide variety of dishes. This ruggedly
built solar appliance weighs only 21 pounds, and can
fold up like a suitcase to be carried with the
The GLOBAL SUN OVEN® can be set up for
use or taken down for storage in a matter of seconds.
The reflectors literally fall into place
at an angle that allows you to maximize the power of the
sun. The reflectors are made of highly polished,
mirror-like anodized aluminum that can be cleaned
quickly and easily with glass cleaner, and they will
never oxidize or rust.
There is never any need to worry about
your food spilling in a GLOBAL SUN OVEN®. While cooking,
your food rests on a shelf that self adjusts to always
stay level as you refocus., and a self-contained
leveling leg can be readily adjusted to choose from 9
different angled positions to allow for correct
alignment to the sun throughout the day.
A thick batt of non-toxic insulation
retains heat. Food cooked in the sun and left in the
oven will remain hot for hours. Cold air is held out
allowing the GLOBAL SUN OVEN® to be used on sunny days
year around regardless of the ambient temperature. A
built in thermometer allows you to see the temperature
at a glance.
||Global Sun Oven
CAFRAMO ECOFAN AIRPLUS
Ecofan™ 812 Airmax
The Caframo Ecofan™ is a heat powered fan designed to circulate
the warm air created by a wood stove. This fan does not use any
batteries or wall cords.
These fans have a
thermoelectric module which acts as a small generator
to power the fan’s motor. When this generator module experiences a heat differential between it’s top and bottom surfaces,
it pumps out electricity. The bottom surface of the module is heated
by the base of the fan, while the top of the module is kept cooler
by the fan’s top cooling fins. The blade has a
The Ecofan Airmax is designed to be used on
freestanding woodstoves with normal surface temperatures
of 150-650 degrees F for optimum performance. Temperatures
above 650 degrees F(340 degrees C) will damage the Ecofan. We
highly recommend that the Ecofan be used in conjunction with a
wood stove thermometer to avoid overheating the Ecofan.
• One year warranty
• Made in Canada
|Ecofan™ 812 Airplus
A Note From Scott and Tracey
Caframo’s Ecofan has been in production for many, many years. We
used an early two bladed model for several years
before it finally ceased to operate (probably because
we overheated it on a regular basis!) We loved its
aesthetics, and its blade rotation visually indicated the amount of wood in our
stove. As the wood decreased, the blades slowed and we
knew it was time to restoke the fire. We hesitate to
say that the twin blade action moved appreciable
amounts of air but we enjoyed having it. Tracey and I have once again test driven the new
three bladed model and it has performed flawlessly.
And we are happy to report that it does move significant amounts of air (actual
CFMs are hard to quantify).
A Note From Sequoya
We have the 802 Airplus and enjoy the
additional heat dissipation it provides. We keep a
kettle on the stove to keep the air from getting too dry
in the home, and the air movement the Ecofan
provides is very evident.
saves water, good spray on less than 10 pounds pressure
For low pressure gravity feed water. Gives a good shower on 7 lbs. pressure, best with
10 pounds. Solid brass, chrome plated.
Minimum shipping $12 per whole order covers all items when no shipping listed
Make the heat where it is needed, no
blowers. Each heater has thermostat to set the individual area as needed.
"COZY" WALL VENTED HEATERS
CDV 25/33 unit shown Center photo (rear in left photo)
CDV 15 is in front in left photo
NO ELECTRICITY NEEDED. Cozy Wall Furnace vents through an outside
wall behind the heater. Sealed combustion unit draws air from outside and exhausts back to
outside. It draws no air from the room, puts no exhaust into the room. The burner is
all stainless steel, with 10 year warranty on burner and sealed combustion unit. Finish is WHITE. Push button spark pilot lighting. Listed models have wall mounted
thermostat for even room temperature, but you can add the much superior
AC fan kit is available for CDV25 and CDV33, but better to add
two DC MUFFIN fans for much lower power use.
The 9" diameter vent pipe fits walls 5" to 9" thick; optional extension
kit goes to 15" thick. Overall efficiency is about 66%.
Estimated Heating Ability
Width x Ht X D
450 sq. ft.
|18" x 28-1/4" x 9-3/4"
750 sq. ft.
|34-1/2" x 31-1/2" x 9-3/4"
1,000 sq. ft.
|34-1/2" x 31-1/2" x 9-3/4"
Set for propane. For Natural Gas,
specify in special requests box of shopping cart.
Shipped truck freight because of size, collect or call for cost.
30 day return privilege does not apply to these appliances.
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Backwoods Solar recommends these superior digital
thermostats for the Cozy heaters:
|O-THERM 9610 same with clock-set temperature changes, allows
setting morning heat, later cooler, evening heat, and night reduction,
plus two of these can skip weekends. ........: $60
Sun-Mar Composting Toilet: Excel
The success of the Excel design meant that a three chamber unit could be
specifically designed for those with NO continuous 110 volt supply. First
launched in 1981, the Excel NE has long been the standard toilet for those
living off the grid. A 1998 redesign gave the unit a rounded look, and
recessed the drum handle. Please give us a call to discuss
the fine art of composting toilets.
The Excel NE has no fan or heater. Odorless operation is achieved by a 4"
vent mounted at the top rear of the unit which acts like a chimney on a wood
stove. For good air movement the vent should be installed vertically and to
2-3 feet above the peak of the roof. Backwoods includes a
free 12V fan kit which should be installed if you need to install the
toilet with any bends in the vent. No more than 2 45° bends are encouraged,
even with the fan. Backwoods recommends using the fan in
This fan draws 1.4 watts and can be powered by a solar panel and 12 volt
Evaporating capacity on the Excel NE is variable, so the 1"
drain at the rear should be connected to an approved drain pit, container, or
|A-EXCEL NE: $
Call for freight quote
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