Timber Decking Company Ltd
Hot Tubs at The Timber Decking Company
This is a precision-built water heater,
especially designed for Hot Tubs. Water is
self-circulating using the "thermosiphon"
principle. Hot water rises and creates low
pressure, which sucks the water from below.
This eliminates the need for a circulation
pump and electricity, making it possible to
heat the water with the heater placed
externally. One great advantage is that
there will be more space in the tub.
Both the outer stove body and firebox are
made of stainless steel. The frame and doors
are made of cast iron, which will guarantee
you years of trouble-free use. If there is a
risk of freezing, the heater must be emptied
of water via the outlet vent. The heat from
the fire is efficiently transferred to the
water through a unique sophisticated
construction, making the entire firebox a
heat-transferring surface. The total heating
efficiency is 14.9 kW.
The Chofu Wood heater is connected to a Hot
Tub with the
connection kit provided. This
consists of a 50 mm PVC plastic pipe,
flexible rubber pipes including clamps, one
straight connection to the side of the hot
tub, and one 90° connection for the base.
- Place the heater on
an even wood, brick or concrete surface.
The heater should be placed 10 cm lower
than the Hot Tub to ensure that the
upper pipe is diagonal. This is
important for circulation and to ensure
that the water drains out of the heater
during cold weather.
- Drill a 60 mm hole
for the upper connection pipe (outflow)
in the side of the Hot Tub, 190 mm above
the base. Drill a similar hole at the
base on the opposite side of the hot Tub
for the heater inlet pipe.
- The straight
connection, including pipe, should be
screwed tightly to the side and the
other connection to the base.
- Connect the black
rubber pipes to the heater and pipes. It
will be easier to connect the pipes if
they are oiled with cooking oil. Tighten
using the included hose clamps.
The Chofu Wood heater operates as a
conventional wood stove, achieving the
fastest heating rate from dry wood. The
firebox is 46 cm long and 36 cm in diameter.
The most efficient heating comes from using
dry wood, 40-43 cm long chopped into a
thickness of 4 X 4cm. One load burns for
approximately at 45 min.
The Chofu Wood heater has a high and
low-speed draft for controlling the heating
rate. Its run with the draft wide open for
fast heating, and slowed down to maintain
temperature once the water is hot.
Chofu Chimney Pipe holder
The chimney is firmly and easily secured to
the burner as is displayed on the picture.
Weather resistant construction
Stove body of stainless steel
Frame and doors of cast iron
Connection parts to the Hot Tub
Large fire place
Vented smoke outlet for a secondary
Discharging vent for the water in order to
protect the heater from frost
- 46 cm (height) x 58
cm (length) x 41 cm (width)
- Weight: 26 kg
- Firebox: 46 x 36 x 36
- Heat exchanger
surface: 0.85 m²
The heating effect varies according to the
quality of the wood and how often you put in
more wood. The approximate heating effect
for the Chofu Wood stove is 14.9 kW. The
heating rate of 1 000 litres of water is
approximately 12° C per hour.
Hot Tub model
Amount of water
Approx. Heating time to 35 °C
Note! If seawater
is used, rinse the heater with fresh water
after use! The same procedure is needed for
chlorinated water or if other chemicals are
The heater should be drained after use if
there is a risk of freezing. The self
circulation stops when the heater is
switched off and the small amount of water
remaining in the heater can easily freeze
and break the heating system. If water is
left in the Hot Tub, it must still be
possible to close and empty the heater pipes