bill arrived in December, he has not been disappointed. Over this past winter, the wattage
of the ALPHA circulators ranged from a low of 7 to a maximum of 23 in the coldest weather, for a total of 112. That represents a substantial improvement over 80 watts for each of the eight previous circulators, or 640 watts total, according to Hunt, who describes the recent cold season as “a typical New England winter,” albeit with considerably less snow. Thanks to an ongoing savings in
power consumption of between 70 and 84 percent, the Hunt family’s monthly electrical bill has been consistently down 12 to 14 percent versus the same month of the previous year. That translates into an annual savings in the neighborhood of $575, according to Hunt’s calculations. While he prefers to wait a full year before arriving at a final payback on the extra investment for the ALPHA circulators, he expects to recoup his money “within three years, give or take a month or two. “Because of our home’s tight
construction and especially with its gypcrete floors for the radiant system, it takes relatively little thermal energy to maintain warmth. But with the old pumps, the heat load didn’t matter: They still consumed the max
in energy 24/7. The ALPHA gives me the ability to lower the wattage without any sacrifice in comfort.” True to his plan, Hunt has been
e Continued on p 58
T.J. Hunt’s son, Josh, vice president of sales at Danbury Plumbing & HVAC Supply, looks over a diagram that depicts the use of the Grundfos pump.
57
Indirect Water Heaters
Quality Design and Construction • All stainless tank and coil • Smooth tube coils; no finned tubing to clog up
• Low heat loss and a thermoplastic jacket
Easy installation • All connections on top for a neat, clean installation
• Brass drain and T+P valves are factory installed
High output and dual coil units for commercial, solar, radiant, and high demand applications.
e Circle 33 on reader reply form on page 80
Hot Water Storage Tank
Quality insulated hot water storage tanks can provide the abundant hot water that today’s homes require.
• Adding storage to your high efficiency heat source can satisfy dump loads. • Same quality design and construction as our indirect water heaters. • Easy installation: 4 connections on top keep it simple.
Hydronic Buffer Tanks
Hydronic buffer tanks will reduce heat pump, chiller, or boiler short cycling. Two connections can be piped to the source, and two connections can be piped to the distribution system. Use it as a hydraulic separator with volume.
• 40, 60, 80, and 115 gallon capacities • Choice of 1 ¼”, 1 ½”, or 2” connections. • Units available with 1 or 2 internal heating coils for solar input, domestic preheat, etc.
phc july 2011
www.phcnews.com
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