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Apartment Tankless Hot Water

mac5367
mac5367 Member Posts: 2
in Domestic Hot Water

Currently live in a apartment with a 40 gallon hot water heater and I am looking to install a tankless hot water heater to save space in the hallway closet. The current water heater is gas and naturally vented 3”, I am on the second floor of a 4 story brownstone, and the electrical service to the apartment is 100 amps.

Apartment has two full bathrooms and a W/D. Does anyone know if someone makes a tankless hot water heater to retro fit this setup? Also looked at electric options but it seems I would have to upgrade the service to accommodate a large enough water heater base off water degree rise and the two showers.

Comments

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,899

    Your biggest hurdle will be venting the unit....not to mention gas piping, testing, permits....$$$$ Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • mac5367
    mac5367 Member Posts: 2

    The venting is what I’m looking for a solution to? Also, do they make a flexible PVC rated pipe for exhaust that I can pull through the 3” conventional vent?

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,899

    Yes, but in NYS, pvc in not allowed for flue pipe, only polypropylene, SS...Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,899

    THen there is no issue of getting gas over to the unit, fire proofing. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • Kaos
    Kaos Member Posts: 550
    edited March 9

    There are some mid size (160kBTU) units that can run with short lengths of 1/2" supply. Somebody has to do the calculation on your setup if they will work. The non-condensing units can connect up to a 3" vent assuming that there is a liner.

  • Larry Weingarten
    Larry Weingarten Member Posts: 3,781

    Hi, Is there anywhere else you could move the water heater, where space is less of a concern? Also, is there a place where a heat pump type heater could go? You won't save much space with tankless, and the maintenance is a thing. It's not set and forget like tanks can be. Not trying to rain on the parade, just personal experience raising its head 🐲

    Yours, Larry

    Mad Dog_2

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