30 Oct '13, 7pm

Efficient hot water delivery for group lodging? #green

While most advice on Green Building Advisor focuses on the case of the single-family home, I'm hoping for some guidance about making hot water for a group lodging: 48 beds, common bathrooms with 8 showers and 12 sinks total. We have propane service, typically somewhere between $1.50-2.50/gal. Electricity just crept up again to 19 cents/kwh. Lodging is unoccupied most of July (summer camp), and for the rest of the year varies between groups staying for just 2 days a week and groups that stay for 7 days. The lodging in question is located at a camp/retreat center in eastern San Diego County, California. It's about 30 years old and was designed with a south-facing roof to accommodate solar. For many years the hot water needs were served by a 5 collector open-loop solar hot water system with 240 gallons of storage and a 100 gallon gas heater for backup. We're at over 4000 feet...

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

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