System type: Drainback solar hot water
Location: Albany, New Hampshire
Solar resource: 4.6 average daily peak sun-hours
Ave. daily production: 500,000 Btu/day
Percentage of hot water produced annually: 75%
Collectors: 12, Sun Earth Inc., 4 ft. by 22 ft. each
Collector installation: South-facing roof, 45° slope
Heat-transfer fluid: Water
Circulation pump: Two primary, two booster; Taco 007
Pump controller: Tekmar 155
Tanks: STSS, Opes 1, 1,550 gal.
Heat exchanger: STSS, 180 ft. of 3/4-in. copper pipe
Backup DHW: Superstor, SSU, 60 gal.
System Performance Metering
Thermometer: DS-60, Azel
Flow meter: F-451004LHN-24, Blue White, sight-glass/flow