Advice - Tankless Water Heaters !

Discussion in 'Tankless Water Heater Forum' started by sandy2982, Mar 27, 2008.

  1. SourKraut

    SourKraut New Member

    Joined:
    Mar 26, 2008
    Occupation:
    Carpenter
    Location:
    Long Guyland, New Yawk
    SR denny. Thanks for your reply.What do yurupeans use to heat their homes? I realize a lot of them do live in multi-family units with a common heat source. But there are a large number of single family dwellings as well. I remember visiting my grandmother in Germany back in the 80's having a tankless heater for the domestic water and cast iron radiators for their heat source.
    I'm curious as to what sort of maintenance is required for the tankless. I feel a little foolish for finding this site after the fact of installing a Rannai unit. I live on Long Island where the water is very good. I am not aware of any contaminants that would clog our plumbing. If so what sort of precautions should I take as the system is only used for heating the floors so half the year it won't be operating.
    I also interested as to what "extra plumbing"(other than a gas line) is needed for the tankless vs the tank type? Outside of the floor heating loops there seems to water in, water out, gas supply.
     
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Many of the tankless systems are not specified for use as area heating devices...unless that one is, you may not have a warranty.

    When used to heat domestic water, you are constantly supplying new water with its dissolved minerals in it. The intense heat in the heat exchanger can cause those minerals to be deposited on the insides of the heat exchanger. If the coating gets deep enough, it acts like an insulator and your heat transfer can suffer radically. I don't think your system when used to heat the house in a closed loop system will run into those problems...wearing out the unit that wasn't designed for potentially 100% duty cycle is.
     
  3. Squ1rrel

    Squ1rrel New Member

    Joined:
    Dec 21, 2007
    Location:
    Texas
    I would agree with Jad on the duty cycle thing. Seeing that copper heat exchanger burned through like someone took a cutting torch to it from overuse is NOT a pretty sight. I wonder if some of these new, stainless steel systems are going to run into the same problems?
     
  4. srdenny

    srdenny Plumbing Contractor

    Joined:
    Sep 11, 2004
    Occupation:
    Plumbing Contractor
    Location:
    SF Peninsula
    to the others debating merits of tankless technology versus tank technology - I consider the "newfangled, more complicated, and not yet widely adopted" tankless technology as compared to the older, more widely adopted tank heater technology to be analogous to computer-controlled fuel injection technology when it came strongly into play in the automotive industry around the 1980's, displacing the previous carburator / air-fuel fuel mixing technology. Fast forward 20 years since then, and sure the technology is still more complicated than carburation, but has been made acceptably reliable and the knowledge of maintenance procedures and repair has become widespread enough to allow nearly all automobiles manufactured nowadays to employ the new technology. In fact there may now be more mechanics / auto-technicians now knowledgeable in servicing fuel injection vehicles than there are who are able to rebuild and repair carburators. We may see a similar market adoption trend with water heater technology in the future. In this case the new technology will become more widespread and accepted, as the price comes down to purchase and maintain it, and it becomes better "tested" and improved, etc.[/QUOTE]

    Your analogy may come to pass. If it does, I'm sure there will be some product variation as the manufacturers adapt to the marketplace, as well as incorporate evolving technology.
     
  5. srdenny

    srdenny Plumbing Contractor

    Joined:
    Sep 11, 2004
    Occupation:
    Plumbing Contractor
    Location:
    SF Peninsula
    "I live on Long Island where the water is very good. I am not aware of any contaminants that would clog our plumbing. If so what sort of precautions should I take as the system is only used for heating the floors so half the year it won't be operating. The water where I live is very good as well, but it still has inpurities. I would recommend checking the filter on the incoming cold side of the heater on a by yearly basis, at least for the first year.
    I also interested as to what "extra plumbing"(other than a gas line) is needed for the tankless vs the tank type? Outside of the floor heating loops there seems to water in, water out, gas supply." The flue requires Cat III (stainless steel) pipe, with a condensate drain.
    __________________
     
  6. plumbernj

    plumbernj In the Trades

    Joined:
    Aug 14, 2005
    Location:
    New Jersey


    Yeah, I heard this same jargon in 7th grade about the metric system.
     
  7. Squ1rrel

    Squ1rrel New Member

    Joined:
    Dec 21, 2007
    Location:
    Texas
    And yet, the US is one of the only countries remaining to use the Imperial Standard measurement..but measurement changes requires the entire system to change, technology alters gradually, as it increases in reliability and availability, and people replace their older systems...just look at cell phones and laptops. Convenience and durability exceeded problems as the technology progessed.
     
  8. Redwood

    Redwood Master Plumber

    Joined:
    Dec 15, 2007
    Occupation:
    Service Plumber
    Location:
    Connecticut
    Many of todays cars with all these newfangled electronic fuel injection, electronic ignition are routinely going 100,000 miles before they ever have a mechanic do anything more than an oil change and other required maint.

    I don't miss those 15,000 mile tune ups a bit! Seems like there is none of that getting the choke right either. What I really like is being able to do a performance tune with a laptop or after market plug in box! One of my buddies has a one ton GM diesel van that will make a corvette owners eyes bug out when he gets left behind at a traffic light!:eek:

    Technology is a wonderful thing!:D
     
  9. jed1154

    jed1154 Member

    Joined:
    Feb 11, 2008
    Location:
    Texas
    I have three electric tankless water heaters. I like them.
     
Similar Threads: Advice Tankless
Forum Title Date
Tankless Water Heater Forum Purchase Advice Tankless or Tank Sep 9, 2018
Tankless Water Heater Forum Requesting advice on tankless hot water heater. Apr 20, 2014
Tankless Water Heater Forum Tankless H20 Heater Newbie Seeking Advice Mar 11, 2011
Tankless Water Heater Forum Need advice regarding tankless (or other) WH for cabin Aug 13, 2010
Tankless Water Heater Forum Tankless Water heater problem...advice needed Aug 27, 2008

Share This Page