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Approx. Cost Of A Tankless Water Heater Install?

Can anyone tell me what I should expect to pay to have a tankless water heater installed?
I had a plumber out today and asked him and he gave me a verbal quote of $3000-$4000 which I thought was rediculusly high. I’ve estimated on my own the cost of the heater needed is pretty low, between $600 and $900 so based on the quote I was given they’re talking 30-40 hours of labor to install?
Basically, all that needs to be done from what he said is a new larger gas line run to where the water heater is which would be about 10 feet and then new vent ducting to the roof which is about 30 feet. And if I go with the bosch 1600H there’s no need for electricity since the water flow provides the power for the ignition.
Thanks.

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  1. Comment by Travis L
    December 23, 2009 @ 8:41 am

    I have installed several of these for a company I had worked for several years ago and we were only charging around $2700 for the parts and labor. Not sure what state you live in but I’m in CA and may want to move to your area and start Plumbing

  2. Comment by William B
    December 23, 2009 @ 11:06 am

    the gas line has to be run by a lic plumber,
    10 ft of gas pipe is around $5 a ft, plus elbows and fittings, and running a vent isn’t easy, so i would say he is in the ball park,
    get a few more estimates,

  3. Comment by USMC Rando
    December 23, 2009 @ 4:04 pm

    Your plumber is right on the money.
    3 to 4 K is right in the ball park for a top quality tank less water heater installed. Which should include parts, gas line upsizes, and electrical upgrades.
    There is more than just plumbing in gas, and running a vent here.
    A licensed plumber has to put in years of training to get a license.
    Then there is his truck, tools, overhead, inventory, business license, insurance, and other business expenses.
    Plumbers usually charge in the neighbor hood of between $60 to $100 an hour, depending on where you live.
    However, I recommend getting 3 estimates, with references.
    Throw out the high and low, and take the middle.
    Stay away from low end heaters like the Bosh.
    Go for a good quality unit like a Rinnai or Noritz.
    Good Luck

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