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  • Thinking of going Tankless

    My 40 gal tank, natural gas water heater is getting old (about 15 yrs.) and I'm thinking about going for a tankless model. The big turn-offs have been the cost of the unit and some bids I've gotten for installation.

    It seems to be running from $2500 up to $4000, depending on who you talk to. I don't begrudge someone making a living, but it seems to me they're pricing themselves pretty high for a days work.

    I'm not rich and going from $800-900 to replace the tank type, up to this figure is not something I wish to do. So, I'm thinking I'll try it myself and if I mess up, I'll call someone in.

    My 3/4" water lines are right below where I want to put it and I'll try my hand at sweating in the fittings or maybe try SharkBite or Pex?

    I'll probably have to call in the gas company to be sure my gas line is sized properly and I can get them to extend it.

    I've found the unit I'm interested in the Rheem RTG-53 DVN online for $589. They also sell the horizontal vent kit for $89., but I'll need to extend it a bit with some straight duct.

    Anyway, we'll see how it goes.


  • #2
    Re: Thinking of going Tankless

    What is the reason you want to go tankless?

    Comment


    • #3
      Re: Thinking of going Tankless

      You need to run all of the vent in Cat III vent. Also the Rheem 53DVN might be a bit undersized for your needs. I would hire a pro for this so this way you get a properly sized heater, properly installed gas line and defiantly a properly installed vent.

      Gas lines if not done properly can leak, and if you use anything but Cat III rated vent piping you will have issues with the vent rotting away, condensation causing issues, and the possibility of carbine monoxide entering your building.
      Ron Hasil Lic #058-160417
      A-Archer Sewer & Plumbing specializing in:
      Tankless Water Heaters | Drain and Sewer Cleaning
      Sump and Ejector Pumps | Backflow RPZ Testing

      Comment


      • #4
        Re: Thinking of going Tankless

        What is the reason you want to go tankless?
        It seems a better way then keeping the water continuously hot, like trying to be green!


        I think it would work out because we don't use hot water at multiple sources at the same time. If someone is showering, we hold off on the washer, etc.

        If I'm able to do it myself for, let's say, under $1000. and it lasts as long as my tank type did, there may be some pay-back. But spending $2500+, I don't think so.

        Comment


        • #5
          Re: Thinking of going Tankless

          Originally posted by SewerRatz View Post
          You need to run all of the vent in Cat III vent. Also the Rheem 53DVN might be a bit undersized for your needs. I would hire a pro for this so this way you get a properly sized heater, properly installed gas line and defiantly a properly installed vent.

          Gas lines if not done properly can leak, and if you use anything but Cat III rated vent piping you will have issues with the vent rotting away, condensation causing issues, and the possibility of carbine monoxide entering your building.
          Thanks for the reply and yes I realize that. I intend to give the vent some downhill pitch to take care of condensation and I will have the Gas Co. extend the pipe.

          Comment


          • #6
            Re: Thinking of going Tankless

            Originally posted by PhilC View Post
            Thanks for the reply and yes I realize that. I intend to give the vent some downhill pitch to take care of condensation and I will have the Gas Co. extend the pipe.
            I just do not want to see anyone get hurt.
            Ron Hasil Lic #058-160417
            A-Archer Sewer & Plumbing specializing in:
            Tankless Water Heaters | Drain and Sewer Cleaning
            Sump and Ejector Pumps | Backflow RPZ Testing

            Comment


            • #7
              Re: Thinking of going Tankless

              Call the guy back will will do it for $2500. Make sure it's an Energy Star approved heater and you will be eligible for a 30% Federal Tax Credit (up to $1500) if this is your primary residence.

              Now it has only cost you $1750 and all you did is write the check.
              Last edited by plumberscrack; 10-20-2009, 05:14 PM. Reason: Sorry, I'm a product of a inner city public school system

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              • #8
                Re: Thinking of going Tankless

                crack how do you do the math? you lost me. breid.........

                Comment


                • #9
                  Re: Thinking of going Tankless

                  Originally posted by breid1903 View Post
                  crack how do you do the math? you lost me. breid.........
                  Yea...
                  I came up with a figure of $1750
                  411 Plumb Appliance Stimulus Package

                  Comment


                  • #10
                    Re: Thinking of going Tankless

                    Phil,
                    You are seriously going to end up blowing yourself and your family up. Do yourself a favor and stick to driving. Let a professional take care of this one.
                    Distractions are everywhere, don't lose sight of your dream.

                    Comment


                    • #11
                      Re: Thinking of going Tankless

                      OK, here's the deal...I spoke to a plumber (Licensed and also lic Electricians) yesterday and he's willing to work on the installation for an hourly fee, which I think is very reasonable.

                      I ordered the tankless heater and direct vent kit online yesterday as well as a service valve set.

                      I'll hang the heater on the wall and run the horizontal vent kit and get the work site ready for him to move the gas where I need it, hook up the water and run me a 120v outlet.

                      As part of the new plumbing work he'll disconnect the old tank type water heater and I'll take care of the disposal.

                      I'm hoping this will accomplish a budget friendly install.

                      Stay tuned for further updates.

                      Comment


                      • #12
                        Re: Thinking of going Tankless

                        Originally posted by PhilC View Post
                        Thanks for the reply and yes I realize that. I intend to give the vent some downhill pitch to take care of condensation and I will have the Gas Co. extend the pipe.
                        The Gas Co. extend the pipe? I believe that's a private plumber's work?
                        I can build anything You want , if you draw a picture of it , on the back of a big enough check .

                        Comment


                        • #13
                          Re: Thinking of going Tankless

                          Originally posted by toolaholic View Post
                          The Gas Co. extend the pipe? I believe that's a private plumber's work?
                          Yes, you're right, I was wrong.

                          Comment


                          • #14
                            Re: Thinking of going Tankless

                            I replaced my entire HVAC system this Summer and I was going to have a tankless installed. The money was set aside, and model decisions have been made. I was really looking forward to, especially it since before coming to Canada that was the only water heating system I knew and I liked it. It's been in use in Europe for at least 50 years now.

                            Well, I decided not go for tankless to based on two reasons:

                            - no bang for the buck. It will use less gas but (the model I wanted, 2 major simultaneous uses) it would pay itself just about when it would be the time to replace the heater. After all we're talking about 85% efficiency for water heater tanks, against 95% (at best) for tankless. That's 10% difference. On a $20 to $40 cost of heating water for an average 4 person family it translates into $24 to $48 savings a year. A conventional gas water heater costs between $800 and $1500 (installed), a tankless will run between $2000 and $5000 installed. Tankles suddenly don't seem like a bargain.

                            - the tankless work best as point of use devices, and that's how they are mainly used in Europe. Based on info from the actual HVAC contractors (I had quotes from 4) tankless ain't so good for house applications. All had them and all regret having installed them. Long story short, between no hot water resorvoir and longish pipe runs the main problem the contractors reported were spikes of cold water in daily applications when the water runs hot (eventually) is turned off for a couple minutes (as when you brush your teeth) and then open the tap again.

                            In Europe you will usually have a couple of them tankles heaters, even in apartments. They are small, fit in kitchen/bathroom cabinets and the hot water is truly instant.

                            I have no reason to not believe the contractors who would have only made more on the tankless installation than they make on the conventional water heaters.

                            my $0.02 (adjusted for inflation)
                            In order to understand recursion, one must first understand recursion.

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                            • #15
                              Re: Thinking of going Tankless

                              You may find this interesting ...

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