tankless water heater for domestic and space heating
I am renovating a three family brownstone. Construction underway, plans approved with separate tankless water heaters for two of the apartments, each to supply domestic hot water and radiant floor heating for the corresponding unit. Anyone know, or know how to verify, that the tankless unit used for both purposes is allowed in nyc? The…
I am renovating a three family brownstone. Construction underway, plans approved with separate tankless water heaters for two of the apartments, each to supply domestic hot water and radiant floor heating for the corresponding unit. Anyone know, or know how to verify, that the tankless unit used for both purposes is allowed in nyc? The equipment is meant for this purpose, and the system was approved during plan examination (which I already know has very little meaning); I just want to make sure a plumbing inspector isn’t going to make us rip it out.
Thanks in advance, I have not been able to locate the answer to this question anywhere.
Tankless hot water heater is really made only for domestic hot water haeter, for heat you should consider to use a high efficency boiler. for the right info,
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Navien makes a combination water heater that you can get with the ASME H rating.
Birchwoodc, that’s wrong. The city won’t allow water to sit in a heat exchanger that can mix with domestic water. The idea is that the water in the exchanger can become stagnant and breed things like legionella.
And no. Intermittent pump exercising won’t satisfy the code.
anyone know of a tankless water heater model that is asme “h” rated to provide both domestic hot water and radiant floor heating?
anyone know of clearance requirements from vent to window/door opening? Most manufacturers installation manuals say 12″ to an operable opening. Is this true in NYC?
but,if you are running it through a heat exchanger,you should
not have a problem with the inspector
Unfortunately, the H-LW stamp means the appliance is approved for domestic water heating only and is not code-compliant as a space heating boiler.
bushburg, i have been looking at Noritz gas tankless water heaters. i was going to use the nrc111, a condensing unit which is more efficient. the nrc111 can be used for domestic hot water. as stated in previous post, for space heating it has to have asme stamp on it. the nc250-dv-asme should meet those requirements
Is an H with an L above and W below acceptable (as seen in the third example in section IV of http://www.onetb.com/asme_code.htm for HLW Lined Potable Water Heaters)?