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wrote:

if someone wants a dont run out of hot water a tank type 50 or 75
gallon 75 Thousand BTU will probably do the job, its twice the heat of
a regulat tank...

jogher BTU cost more but i wouldnt have it any other way

Since the efficiency of a heat exchanger drops with the firing rate,
a large well-insulated tank with a small fire could be more efficient.
And a valve that closes the flue when there is no fire.

Nick