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Double wall heat exchanger: copper tubing wrap-around design
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Gas backup heating source
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3/4'' water and collector loop connections
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Collectors - 3'' x 8'' and 4'' x 10''
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Flat plate design
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Black paint absorber coating
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OG-100 certified by SRCC
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Included: HE tank, collectors, controller, multi-speed pump, mixing valve, glycol solution, thermal expansion tank (for glycol loop)
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Sold separately: 18 AWG sensor wire, tilt mount kits (consult factory for mounting options)
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OG-300 certified by SRCC
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75.1 Btu/hr input(natural gas)