GF Piping Systems Urecon
PEX-Flex
Technical Information Outdoor Wood Furnaces Other Applications Order PEX-Flex
 
outdoor wood furnaces
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 … meaning 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. distributes Logstor products throughout Canada and the US.

The Payback:

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:
  • An average cord of wood yields 24 million BTU's (7 MW/hr).
  • 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.
* Individual payback times will vary relative to the severity and length of the heating season.


Temperature drop with dual PEX-Flex

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)
Flow Distance
GPM (US) 1/sec 100 ft (30 m) 150 ft (46 m)
3 0.19 178.5°F (81.4°C) 177.8°F (81.0°C)
5 0.32 179.1°F (81.7°C) 178.7°F (81.5°C)
10 0.63 179.5°F (81.9°C) 179.3°F (81.8°C)


Dual PEX-Flex Dimensions

Nominal
pipe size
Carrier
pipe OD
Carrier
pipe ID
Carrier
pipe wall
thickness
Jacket
pipe OD
Standard/
Maximum
coil lengths*
Minimum
bending
radius
Weight
in in
(mm)
in
(mm)
in
(mm)
in
(mm)
ft
(m)
ft
(m)
lb/ft
(kg/m)
2 x ¾ 2 x 0.98
(2 x 25)
0.784
(20)
0.098
(2.5)
4.3
(110)
328/ 656
(100/200)
3.5
( 1.1)
1.4
(2.1)
2 x 1 2 x 1.26
(2 x 32)
1.032
(26.2)
0.114
(2.9)
4.3
(110)
567/1,134
(173/246)
3.5
(1.1)
1.5
(2.2)
2 x 1¼ 2 x 1.57
(2 x 40)
1.280
(32.6)
0.145
(3.7)
4.9
(125)
328/ 656
(100/200)
4.0
(1.2)
1.8
(2.7)
2 x 1 ½ 2 x 1.97
(2 x 50)
1.608
(40.8)
0.181
(4.6)
6.3
(160)
328
(100)
5.2
(1.6)
2.8
(4.1)

* 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.

PEX-Flex Temperature and Pressure

Pipe size Max. temperature Max. pressure
in (mm) Fahrenheit (Celsius) P.S.I. (bar)
¾ - 1½ (20 - 50) 203 (95)* 87 (6)

* Refer to detailed PEX-Flex product specification for temperature and pressure considerations

 

Outdoor Wood Furnances

contact
CANADA
75 Dupont Blvd.
Coteau-du-Lac, Quebec
J0P 1B0
Phone: (450) 455-0961
Fax: (450) 455-0350

5010 43rd Avenue
Calmar, Alberta
T0C 0V0
Phone: (780) 985-3636
Fax: (780) 985-2466

USA (FLORIDA)
Phone: (866) 739-2645

info@pexflex.net
1-866-PEX-COIL
(1-866-739-2645)

 
literature
Dual PEX-Flex
PEX-Flex Quick Facts Flyer
Outdoor Wood Boiler Pipe Tour
 
1-866-PEX-COIL (739-2645) | INFO@PEXFLEX.NET LOGSTOR CALCULATOR | CONTACT | FRANÇAIS