Only a professionally
manufactured insulated pipe will maximize the
efficiency of an outdoor wood furnace system
by keeping heat losses to a minimum. By effectively
heating the house (not the ground), less fuel
is required, less wood is burned producing less
emissions. Whatever your budget, you simply can’t
afford not to install PEX-Flex! Supplied in coils, this 2-in1 (supply
and return bundled together) pipe is economical,
simple to install and highly effective even in
harsh soil conditions.
PEX-Flex is “self-compensating”
with respect to expansion and contraction …
just uncoil and snake into trench, then backfill.
The pipe installs quickly and easily without
solvent welding, special tools or heavy equipment
resulting in a lower installed cost when compared
to other insulating methods. No drainage tile,
gravel fill or deep/wide trench required. PEX-Flex
can be shallow buried even in high water table
areas. The flexible nature of coiled PEX-Flex
all but eliminates the need for joints, elbows
and fittings making it a true seamless pipe system.
The PEX-Flex carrier pipe is made of plastic
cross linked polyethylene (PEX) with EVAL coating
which keeps oxygen from penetrating the pipe
wall. The PEX is surrounded by a factory applied
layer of closed cell, eco-friendly polyurethane
foam – the best insulation material on
the market. The whole package is encased in a
tough but flexible extruded polyethylene jacket
with UV stabilizer.
The pipe system is bonded
the carrier pipe(s), insulation and jacket are
mechanically linked to one another and move collectively
during expansion/contraction. This also isolates a moisture problem to damaged area should the jacket be punctured … water cannot migrate through entire pipe system.
All PEX-Flex pipe comes equipped with a “smart”
membrane between the outer casing and the insulation.
This leak proof diffusion barrier prevents (cyclopentane)
gas in the foam from escaping through the jacket
and being replaced by atmospheric air which has
inferior insulating properties – a process
called “aging”. This keeps the operating
performance high throughout the entire service
life of the pipe.
PEX-Flex is manufactured by Logstor
of Denmark, the world’s largest producer
of pre-insulated pipe systems employing over
1300 people in 8 production facilities. Logstor
has over 30 years experience of pre-insulating
flexible PEX tubing. Urecon Ltd.
products throughout Canada and the US.
Installing PEX-Flex actually pays for itself
over time*, and you're also helping to do your
part to reduce emissions.
The expected yearly savings is approximately 1 1/2
cords of wood based on the following assumptions:
* Individual payback times will vary relative
to the severity and length of the heating season.
- An average cord of wood yields 24 million BTU's
- The trench from the furnace to the building(s) is
approximately 100 ft (30 m) long.
- The payback is based on a comparison to bare or
poorly insulated piping systems. These inferior
systems may be the result of using materials with
insufficient insulating properties, inadequate
insulation thickness, or may simply be insulation
that absorbed moisture due to water ingress
through the jacket or joints.
Using 2 x 1 in x 4.3 in OD (2 x 32 mm x 110 mm OD) with
following operating parameters:
- Supply temperature: 180 °F (82 °C)
- Soil temperature: 32 °F (0 °C)
||100 ft (30 m)
||150 ft (46 m)
|2 x ¾
||2 x 0.98
(2 x 25)
|2 x 1
||2 x 1.26
(2 x 32)
|2 x 1¼
||2 x 1.57
(2 x 40)
|2 x 1 ½
||2 x 1.97
(2 x 50)
* Pipe can also be supplied to exact length required. Maximum lengths are special order.
n.b .: All core pipe sizes are metric; metric compression x imperial NPT threaded adaptors are supplied as required.
|¾ - 1½ (20 - 50)
* Refer to detailed PEX-Flex product specification for temperature and pressure considerations