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Re: Pex Radiant Heating

From: info@builderswebsource.com
Category: HVAC
Remote Name: 63.198.181.43
Date: 18 Aug 2001
Time: 03:48 PM

Comments

Leading manufacturers, such as Wirsbo (http://www.wirsbo.com) and Roth (http://www.roth-usa.com) certify their radiant floor heating products to 200 degrees F, with no more than 80 PSI.

Depending on whether you use fittings that can corrode will determine which type of PEX tubing is suitable for your application. Wirsbo's hePEX™ plus is suitable for radiant floors, ceilings and heat panels. We always advise, however, that you first contact the manufacturer to discuss your proposed application to ensure that the product is suitable for use in the way you intend. Always follow manufacturer's installation recommendations and be sure to install a high quality thermostat to avoid overheating the water, which could cause a scalding explosion.

The following excerpt is reprinted here from the Wirsbo website:

Wirsbo offers two types of PEX tubing for radiant floor heating applications: Wirsbo-hePEX™ plus is oxygen diffusion barrier tubing. hePEX™ plus is designed for use in closed loop hydronic radiant panel heat transfer (radiant floor, radiant ceiling and snow-melt) and distribution systems. Corrodible components may be used in the hePEX™ plus circulating loop. Wirsbo-hePEX™ plus is manufactured and listed to ASTM F876 as certified by Hauser Laboratories and the National Sanitation Foundation. hePEX™ plus is rated at 73.4° F at 160 psi, 180 ° F at 100 psi and 200 ° F at 80 psi. These pressure and temperature ratings are issued by the Hydrostatic Design Stress Board of PPI (Plastic Pipe Institute). PPI is a division of the Society of Plastics Industry (SPI). Wirsbo-hePEX™ plus tubing is available in 3/8", 1/2", 5/8", 3/4", 1" nominal inside diameter. AQUAPEX tubing is cross-linked polyethylene tubing with no oxygen diffusion barrier for use in open, or open-loop hydronic panel heating systems and hot and cold potable water systems operating at sustained temperatures up to 73.4° F at 160 psi, 180° F at 100 psi and 200 ° F at 80 psi. Corrodible components must NOT be used in AQUAPEX circulating loops. AQUAPEX is manufactured and listed to ASTM F876, F877, and F1960 as certified by Hauser Laboratories and the National Sanitation Foundation. AQUAPEX is available in 3/8", 1/2", 5/8", 3/4", 1", 1 1/4" and 1 1/2" nominal inside diameter.

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