cpw
Joined on April 14, 2010
Last Post on May 1, 2010
Recent Posts
non-oxygen barrier pex and the prestige excellence
@ May 1, 2010 7:49 PM in Water Heater for Slab Heat
I'm the guy you guys convinced not to go w/an open system. I had already, however bought my system except for the heat source and installed my slab manifolds and laid out and covered my regular pex w/concrete. (It was a slab on slab installation). Since deciding to close my system based on my research I'm thinking about using a Prestige Excellence for a heat source, buying an air separator, expansion tank, etc. Is this heat source compatible w/my pex? If not, what are my options? A Combi water heater, or two heat sources? What are your suggestions? Thanks!Open Systems?
@ April 14, 2010 1:19 PM in Water Heater for Slab Heat
So I hear from Rob that there is a lot more surface area in radiant systems than in domestic water for bacteria to grow. That makes sense. I still don't have a sense of how high the risk is. Why would certain governing boards such as the ICC approve these systems? Are some Open Systems safe and other's not?Open Systems
@ April 14, 2010 2:05 AM in Water Heater for Slab Heat
I hear and read from many about the risks involved in Open Systems. What I've read is that the risk comes from water stagnating and bacteria growing in the pex. Several Open System designs that i have seen claim to prevent this problem by including a check valve which flushes out the heating tubing every time the domestic water is turned on. If this stagnation is indeed the source of the problem wouldn't this check valve eliminate the risk of Open Systems? Or are there other problems?
