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This roof integrated system was a design feature
of the home when it was built. Ideally sited,
it had
provided 20 to 25 years of service and is part
of a
system that includes a lake source heat pump and
a wood stove loop. There is a 1000 gallon solar
hot
water storage tank heated by the array The eighteen
solar panels are enclosed by low iron , high T
tempered
glass with very high solar energy transmission.
The glazing and all aluminum framework
and
substructure were removed and stored on site while
the old insulation was replaced with 2" foil
faced
polyisocyanurate foam board. AET/Thermofin
provided the new 100% copper absorber plate which
is high frequency welded to the absorber risers.
This weld insures maximum heat transfer. The
absorber plates have a selective coating to maximize
absorption of the suns rays and a clear coat that
reduces emissivity. The array of absorbers was
assembled and soldered together from the top down.
The original sensors were replaced and reconnected
to the differential controller.
After pressure testing the system was restarted
Dec 20th and provided an 11 degree temperature
rise on the 20th and then again on the 21st (shortest
day of the year) normal operating temperatures
were achieved within the next week. The system
performs consistently and automatically.
References available from the owner on request.
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