05 Aug '11, 4pm

Green Building Q&A: Solar thermal system and collector choices

I'm renovating a house in the Seattle area. Part of the renovation includes changing the roof lines for good solar exposure. Heating will be hydronic radiant upper floor (1900 ft2) and hydronic wall panels in finished daylight basement (1400 ft2). Floors will be connected with an open staircase. Air sealing and high levels of insulation are being incorporated. Being on Puget Sound, we're sacrificing insulated west walls for an expansive view of the Sound using a lot of Serious windows. Very efficient windows but windows none the less. On the rare Western Washington sunny winter afternoon, they'll help in heating the house. Energy system involves the following: PV (2 arrays) Solar thermal (liquid) ERV Daikin Altherma air-water heat pump with Daikin DHW tank. I've been presented an extensive energy package proposal. The solar thermal system proposed is a closed loop pressuri...

Full article: http://www.greenbuildingadvisor.com/community/forum/mecha...

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