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JapanGarden.co.uk :: Interiors :: Buy Traditional Hot Tubs and Japanese Style Oforu :: Chofu Wood Heater and Chimney

Chofu Wood Heater and Chimney
Chofu Wood Heater and Chimney 
Chofu Wood Heater


Features

* 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
* No jets

Specifications

* Dimensions: 16" wide x 23" long x 18" high
* Weight: 59-lbs.
* Stove body: Grade 316 stainless steel, inner wall 20-gauge, outer wall 22-gauge
* Stove Front: 1/8-inch steel
* Firebox door and grates: cast iron
* Firebox dimensions: 18"L x 14"W x 14"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.



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 heater is a simple solution to the problem of heating a natural soaking tub. It is ideal for those who want to heat with wood and works well with small or medium sized tubs. Great for remote cabins!

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.

Operation
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 small pieces of 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.

Heating Rate Information
Although the heating rate is variable depending on dryness of wood, frequency of loading, etc., the average heat output of the wood heater is 32,000 BTUs. A 200-gallon tub can be heated at approx. 20°F per hour.

Note: The heat output of the Chofu increases after an initial 30-min. warm-up period that heats the stove body and establishes a bed of coals. For a typical tub a couple of armloads of wood will heat the water to temperature.

Heating Schedule
80 °F to 105°F

* 200 Gallons: 1.25 hours
* 300 Gallons: 1.5 hours
* 400 Gallons: 2.2 hours

Complete with Chimney Kit (4 - 24" lengths of stainless stove pipe)

Details
 
Availability: Worldwide Shipping
Price: £917.37
inc VAT

Options (price may vary with selection)
 
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Detailed images
chofu heater
chofu heater available in the UK
chofu heater available in the UK
 

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