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Handcrafted Coopered Barrel Hot Tub
Features • Pre-assembled Cedar Hot Tub Packages • Custom Wooden Upgrades • Tub Specifications • Water Heaters
Water Heaters
Chofu Wood-Fired Water Heater
Installation
 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 thru-wall ports.)
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.
- nstalling 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.
 Chofu Propane Water Heater
Installation
The Chofu connects to a tub with provided accessories (see connection kit): flexible neoprene tubes, stainless steel pipes, and thru-wall tub-ports.
Installation Sequence:
- The heater is placed on a brick or cement foundation next to the hot tub.
- 1 7/8-inch holes are cut in the side of the tub wall to receive thru-wall ports.
- Connecting pipes are assembled between heater and thru-wall ports. (Connecting clamps are fastened with a screwdriver.)
- The heater is connected to a propane source, either a portable or permanently installed propane tank.
Operations
The Chofu heats water on-demand, the day it is needed. (It does not have a thermostat). The heater is operated manually with an automatic ignition switch, however, it uses a spring wound timer to control the duration of heating and to automatically turn off the heater. The main control switch for the heater is designed to be mounted on the side of the tub, for easy access in or out of the tub. If water in the tub looses too much heat while it's being used, it can quickly be brought up to temperature without having to step out of the tub.
Features
- Operates without electricity
- Automatic ignition switch
- Automatic heating timer
- Tub mounted remote control switch
- Drain valve for freeze protection
- Weather proof housing
- Safety shut-off for over-heating
Specifications
- Dimensions: 17" high x 17" long x 10" wide
- Weight: 19-lbs.
- Stove Body: Powder coated steel
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