H6 Manual - Hardy Heater
2019-10-29 · the last section designates that your heater is without domestic hot water. The 7in the last section designates that you have extra ports on your heater. On H3, H5, and H6 models domestic hot water is only available through the use of externally mounted heat exchanger kits. Heater Rating H3 –120, 000 BTU H5 –180,000 BTU H6 –100,000 BTU
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