All are welcome to the thermal mass heater lecture and workshop in Valdez Aug. 7-9, 2015. Cooperative Extension Service will host a lecture Aug. 7 at Corbin Creek Farm about thermal mass heaters for greenhouses and a free weekend workshop Aug. 8-9, in which participants will build one. Extension Energy Specialist Art Nash and Jim Scott, a retired engineer from Talkeetna, will lead the events at the farm, which is located at 3042 Fairweather St., about 6 miles north of Valdez. The one-hour lecture will begin at 6 p.m. and will be immediately followed by a session in which participants will design one. Scott will explain how thermal mass heaters work, how they can be built and what conditions they operate best. The workshop will run from 8 a.m. to 5 p.m. Saturday, Aug. 8, and 8 a.m. to 3 p.m. Sunday, Aug. 9. Nash said thermal mass heaters can be built with common scrap and easy-to-use materials, and they use wood biomass and gasification to provide and store heat. The heaters can extend the greenhouse season before breakup and after freezeup. For more information, contact Carmen Kloepfer at cckloepfer@alaska.edu or 474-5854.

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