Best DHW for my situation
We just purchased a small, single-level ranch with electric baseboard & wood stove for heat. The hot water is currently a propane 50 gallon tank in the laundry room, which is about 10'x5'. With the dryer going, the worst-case depressurization fails and potentially back-drafts the atmospheric draft hot water heater. The current water heater cannot stay, and there is no where else to locate it. The crawl has no inefficient source of household heat, and is only 4' tall, less the joists.
The house is tight - about 1,300 CFM 50 for an 8,250 cu ft house. .44 ACHn. ( I know many of you don't like that calculation. Let's NOT have that discussion here, now!)
I have considered & eliminated the following:
Atmospheric Draft Propane Tank - see above
Sealed Combustion Propane On-Demand: too pricey to install & very slow payback, per several blog postings on this site.
Hybrid Electric Tank: Noisy & could chill the laundry room in the winter. The noise is my biggest concern. I was seriously thinking the wood heat would throw off enough excess to support this but the noise factor is important.
Electric standard tank - not very efficient
Electric On-Demand - expensive to install.
We do have 200A service & could disable a few of the electric baseboard circuits to suppor the On-Demand.
Thoughts & recommendations would be appreciated!
Posted Aug 25, 2014 3:26 PM ET
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