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  • #46
    Re: Tankless water heaters

    Originally posted by wrench spinner View Post
    another train wreck cant help but watch / chime in. but if you don't have the clearance on the front to take a picture how do you think you'll have the clearance in the front to properly work on it!?

    You didnt use the right vent pipe at all, if you used the right vent you would have had half the seams. And BTW Bosch is NOT takagi and Home Depot DOESN'T sell the right vent pipe.

    Finally your inspector should be fired!/hung
    Sorry but you're the one who is making this a train wreck. There is plenty of room to work on the heater if needed. I just cannot get a zoomed out photo to show the whole heater from the front.

    As far as the Bosch and Takagi - the Bosch 240FX is the Takagi TK1.

    Maybe they have better inspectors where you live??

    Comment


    • #47
      Re: Tankless water heaters

      The vent looks a mess. Sorry. I use what a manufacturer specifically says too. Not what might work.

      He does appear to have enough front clearance though. (No tape measure picture. Maybe the camera wouldn't focus at the distance for a good picture.


      J.C.

      Comment


      • #48
        Re: Tankless water heaters

        Comment


        • #49
          Re: Tankless water heaters

          Originally posted by blue_can View Post
          Sorry but you're the one who is making this a train wreck. There is plenty of room to work on the heater if needed. I just cannot get a zoomed out photo to show the whole heater from the front.

          As far as the Bosch and Takagi - the Bosch 240FX is the Takagi TK1.

          Maybe they have better inspectors where you live??
          It does look Takagi-ish. Not sure if they still make them for Bosch now.

          Some inspectors are great, some are nuts, some are in-between.

          It would be wise to update your vent as it does not seem to be aging well.

          Good luck.


          J.C.

          Comment


          • #50
            Re: Tankless water heaters

            Honestly and seriously the pictures of your venting are not correct and are dangerous. PLEASE replace the B-vent with the appropriate category III vent ASAP

            Comment


            • #51
              Re: Tankless water heaters

              Here's the manual that even gives some approved venting mfgs. on page 11 when you update.

              http://docs.google.com/viewer?a=v&q=...DCI_rPNLvX3iaw


              J.C.

              Comment


              • #52
                Re: Tankless water heaters

                Originally posted by wrench spinner View Post
                Honestly and seriously the pictures of your venting are not correct and are dangerous. PLEASE replace the B-vent with the appropriate category III vent ASAP
                Other than the fact that is it galv rather than SS there is nothing particularly wrong with the vent - it is vented in accordance with codes, sealed from leaks but does not look very pretty. Nothing there to be in fear of my life at the moment . It certainly would look much better with the fittings that Ron has shown.

                Ron - do you have a source for your pipe and fittings. It would be a quick job to change it out and would look much nicer.

                Comment


                • #53
                  Re: Tankless water heaters

                  Quick search yields this.

                  http://www.stainlessventingandchimne...ent-p-100.html


                  J.C.

                  Comment


                  • #54
                    Re: Tankless water heaters

                    Originally posted by JCsPlumbing View Post
                    It does look Takagi-ish. Not sure if they still make them for Bosch now.

                    J.C.
                    I don't believe they do anymore

                    Comment


                    • #55
                      Re: Tankless water heaters

                      Originally posted by blue_can;332603[COLOR=Red
                      ]Other than the fact that is it galv rather than SS there is nothing particularly wrong with the vent - it is vented in accordance with codes, sealed from leaks but does not look very pretty.[/COLOR] Nothing there to be in fear of my life at the moment . It certainly would look much better with the fittings that Ron has shown.

                      Ron - do you have a source for your pipe and fittings. It would be a quick job to change it out and would look much nicer.
                      Just to clarify, I do not believe it is vented according to code. Approval from inspections does not make it correct if you know what I mean.

                      Anyway, update it and you'll be happier & safer in the long run.


                      J.C.

                      Comment


                      • #56
                        Re: Tankless water heaters

                        Originally posted by blue_can View Post
                        Other than the fact that is it galv rather than SS there is nothing particularly wrong with the vent - it is vented in accordance with codes, sealed from leaks but does not look very pretty. Nothing there to be in fear of my life at the moment . It certainly would look much better with the fittings that Ron has shown.

                        Ron - do you have a source for your pipe and fittings. It would be a quick job to change it out and would look much nicer.
                        The galvanized will corrode because it isn't meant to take the condesnation, from a tankless. Do you really think that you know better than thousands of professionals who have installed many of these units and the manufacturers just because the *** that gets payed $11 an hour at home depot says you can do it and the ignorant plumbing inspector doesn't know the difference between Z vent and B vent say so.

                        The galvanized will not hold up to the acidic condensation from a tankless.

                        PROVE ME WRONG

                        Comment


                        • #57
                          Re: Tankless water heaters

                          Originally posted by wrench spinner View Post
                          The galvanized will corrode because it isn't meant to take the condesnation, from a tankless. Do you really think that you know better than thousands of professionals who have installed many of these units and the manufacturers just because the *** that gets payed $11 an hour at home depot says you can do it and the ignorant plumbing inspector doesn't know the difference between Z vent and B vent say so.

                          The galvanized will not hold up to the acidic condensation from a tankless.

                          PROVE ME WRONG
                          In what way is the condensation from a tankless different to any other gas fired appliance? What makes it "acidic"?

                          Comment


                          • #58
                            Re: Tankless water heaters

                            Here's your link:

                            http://www.creia.org/January-2011-In...ppliances.html

                            What kind of engineer by the way?

                            Drive a train? Design Bridges? Traffic? ME? CE? BioMed? Just curious?

                            Comment


                            • #59
                              Re: Tankless water heaters

                              From: http://ezinearticles.com/?Condensing...ers&id=4370344

                              "As Tankless water heaters become more popular here so are increasing choices of types and manufactures.

                              One term that is referred to lately is Condensing Tankless Water Heaters, so what is behind that?

                              As the term applies tankless water heaters don't have a water storage tank like the traditional water heaters. The water in a tankless unit is heated as it flows through its heat exchanger which is heated through combustion, more intense that your regular water heater.

                              In a typical combustion we burn the hydrogen content of the fuel and as the result hot gases are produced. One of these hot gases is steam or better water vapor. Now when these steam gases are cooled they turn into water that we generally refer to as condensation.

                              The condensation water is acidic (pH 3-5) and hence corrosive. It will corrode steel metals and other materials.

                              A Non-Condensing tankless water heater will push these hot gases through its vent to the outside. They will then cool down outside the unit. These gases have temperatures around 300 degrees F and must be vented through non-corrosive venting materials that can withstand the heat. Here is special stainless steel category 3 venting used, which is expensive.

                              In the combustion process fuel was burned and that energy was used to heat the water, although not all of it. Because the hot exhausting gases contain heating energy that is not used to heat the water and are wasted by exhausting them to the open. The hotter the exhaust gases are the less energy is used in heating the water and hence lower efficiency.

                              Non-condensing units have efficiencies around 80%, meaning around 20% of the heat is wasted and exhausted.

                              Condensing Tankless Water Heaters

                              Condensing Tankless Water Heaters extract the additional heat from the exhaust gases through various means and therefore exhaust cooler gases, usually around 100 degree F. As mentioned before cooling the exhaust gases produces condensation, in this case inside the unit. Since the exhaust gases are now much cooler a less expensive venting material can be used, mostly standard PVC schedule 40 is used as it can easily withstand the heat and the corrosively of the gases. Since we have captured the residual exhaust heat to heat the water we have achieved higher efficiency in the high 90% (up to 98%)."

                              Comment


                              • #60
                                Re: Tankless water heaters

                                ALL newer/higher efficiency fuel fired appliances have the potential to create acidic condensation.

                                Can't replace that heater or whatever and use the same brick chimney anymore either.


                                J.C.

                                Comment

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