Re: Dual Hot Water Heaters
Posted by hj on October 27, 19100 at 03:09:51:
In response to Re: Dual Hot Water Heaters
I always connect them is series. To connect them in parallel, the piping has to be exactly the same to each heater, and even then there can be differences in the flow resistence, or the flow will have a tendency to favor one unit or the other which would reduce the advantage of two heaters. In addition, with a series installation, the second heater will not operate until the first unit is unable to maintain the temperature at which time both units will operate.

: Our house is in need of more hot water than our current 50 gal unit can supply(six years old). Our plumber has suggested installing two 50 gal heaters in series instead of a 75 gal unit. He states that cost will be similiar and we would get that extra capacity. Is it safe to connect gas hot water heaters in series or should they be parallel? Even if the installation cost is comparable, would there be a great difference in operating cost?

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