tankless hot water

  1. G

    High GPM requirement tankless help

    Hi guys, I've learned a ton from following on here and want to first thank everyone for advice. I'm installing a high volume shower upstairs in a high end small airbnb. Outside of the shower the rest of the hot water demand should be minimal, kitchen sink, bathroom sink, dishwasher, and washer...
  2. Larry in Veneta

    Hot water takes a while

    Re-piped house in 1/2 inch PEX, with a Stiebel-Eltron 80 amp tankless water heater set at 121 degrees Fahrenheit and Manabloc manifold, both in the garage (partially insulated). Takes a while to get hot water to the kitchen and bathroom (runs are about 40-50 ft). PEX goes up through...
  3. Toocutetofail

    Tankless goes lukewarm, Scratching my head... why?

    Hello, I was trying to diagnose a tankless water heater problem as the water would turn hot to lukewarm after few seconds. In the process, I wanted to make sure there was no hot-cold water crossover from mixer valves at any of the fixtures. So I turned the valve off at the outlet of the TWH...
  4. KevinL

    Navien NPE 240 A2 Flame Loss

    Hi All, I have a Navien NPE 240 A2 that was installed 3 months ago. I've noticed that in the mornings/first time I call for hot water the tankless will go through 4 short cycles before stabilizing and delivering hot water. The odd thing is the flow says 4.4-4.8 gpm which is inaccurate as I'm...
  5. Izabella

    "Point of Use" or "Whole House Tankless"?

    I am renovating a new one bedroom, one bathroom home. It is 900 square feet in size, so space is at a premium. It means we won't be able to use the conventional big tank heater. Because we don't have gas, we'll need electricity ...and one Whole House Tankless or three Point of Use heaters in the...
  6. James Glenn

    Tankless heater as a heat source

    I have a 4.5 GPM tankless water heater supporting a hydronic heating system in my garage. Right now I have a Watts 500800 recirculating pump on the hot water side right after the Taco air scoop and pressure relief tank. The water runs through the pump and up to a blower (radiator) and back down...
  7. Michele Boddy

    Extra POS heater to fill large bathtub?

    We are remodeling our master bath to include a 80 gal whirlpool tub (55g min/72gal max). We have a 100 gal gas water heater for the whole house in the garage. But the tank is on the other side of house from the tub. We already have a considerable wait for hot water in this bathroom. The tub...
  8. Dradam

    Calibrating Navien NPE240A

    When my Navien NPE 2401 tankless water heater is set to 120 degrees F I get 115 degrees at my farthest fixture. Set at 125 degrees I get 120 F at my farthest fixture. It there a way to calibreate the temp on these units-- I see nothing in the Manuals. Thanks
  9. CarterM

    Rinnai E110CP on Generator Power

    I bought a 11kWH Wen Generator and my uncle who is an electrician wired up a connect from the outside of my house into the panel using an interlock switch. I tested the generator last night and it powers what I need it to. Some lights, refrigerator, well pump and almost the water heater. The...
  10. undertheesea22

    Can a *tankless* heater run in conjunction)rotation( w a normal 40gal

    *~* - - - - - - - - - *~* *~* - - - - - - - - - *~* i am not allowed to remoue the 40 gallon...
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