Installation requires these four
basic steps:
- Preparing a brick or cement foundation next to the
hot tub to receive the Chofu heater.
- Cutting 1 7/8-inch holes in the side of the tub wall
for thru-wall ports.
- Installing pipes to connect heater and tub.
- Installing the stove pipe, (8 feet recommended)
Operations
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.
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
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
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
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.
Heating Schedule
55ºF to 105ºF
|
Gallons
|
Time
|
|
100
|
1 1/2 Hours
|
|
200
|
2 1/2 Hours
|
|
300
|
3 1/2 Hours
|
|
400
|
4 1/2 Hours
|
Filter System Option
The Chofu system will be attractive to
customers who have limited electrical capacity at their cottage or would not frequent the hot tub on
a daily basis (weekend use). As an option we offer a low voltage filter/pump system with a GFI
receptacle. This system, with proper chemical maintenance, allows users to extend the clarity and
"health" of the water allowing an extended time frame between draining of the tub.
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