GREEN SYSTEMS PRODUCTS | SOLAR SOLUTIONS | CONTINUED FROM PAGE 64
years. The results show unmitigated success in consistently reducing the heating fuel consumption after the solar retrofit. Between 2004 and 2006, some fuel savings was achieved using thermostat setbacks with the old boiler but, because some of the rooms became uncomfortably cold, the thermostats were raised to around 65°F between
2006 and 2009.) The owner’s analysis of this data
includes some interesting highlights. Propane use has been reduced from about two – three heating degree days per gallon of propane before the retrofit to about five – seven heating DD/gallon after the retrofit. For domestic hot water, propane use is down to 0.6
gallons a day, versus the historic rate of 1.5 gallons/day. The house has typically netted 80 to 110 kWh/day (273 – 375 kBtu/day) of solar heat this winter. Annual propane consumption has dropped by about two-thirds, which amounts to about 1,300 gallons per year saved. This is worth more than $3,000 per year at current local prices and will be worth more as the price of propane goes up. As an added bonus,
the owner has noted that the energy savings documented here was achieved in spite of an increased room temperature setting of 68 F (up from 65 F). So, along with significant fuel savings, the occupants are enjoying increased comfort levels.
68
Final notes These articles are
MAY 22-26, 2011 TRADE SHOW DAYS ARE TUESDAY & WEDNESDAY HERSHEY, PA TECHNICIANS:
Give yourself a career boost. Lots of Training Opportunities and CEUs. The Industry’s biggest Energy Trade Show. Oilheating, Propane and More. See all the new products and talk to manufacturers about making your work go smoother. HVAC and Plumbing Techs welcome.
OWNERS AND MANAGERS: Give yourself an advantage. Your techs should be here. You should, too. Learn where your future profit making and cost savings will come from. Courses and education for you from top industry presenters. A great chance to network with peers.
GIVE YOURSELF SOME FUN: Scholarship Golf Tournament. Opening Reception. Care to Ride Events. Industry Awards Banquet. Theme Party.
IT’S THE OIL AND ENERGY INDUSTRY’S BIGGEST EVENT AND BEST TIME
targeted toward residential and small commercial buildings smaller than 10,000 feet. The focus is on pressurized glycol/hydronic systems since these systems can be applied in a wide variety of building geometries and orientations with few limitations. Brand names, organizations, suppliers and manufacturers are mentioned only to provide examples for illustration and discussion and do not constitute any recommendation or endorsement.;
Bristol Stickney has been designing, manufacturing, repairing and installing solar hydronic heating systems for more than 30 years. He holds a Bachelor of Science in Mechanical Engineering and is a licensed
FOR COMPLETE DETAILS, EVENT SCHEDULE AND LODGING INFORMATION, VISIT
www.naohsm.org
888.552.0900
mechanical contractor in New Mexico. He is the chief technical officer for SolarLogic LLC in Santa Fe, N.M., where he is involved in development of solar heating control systems and design tools for solar heating professionals. Visit
www.solarlogicllc.com for more information.
phc march 2011
www.phcnews.com
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