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Thread: Wet Back fires

  1. #1
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    Wet Back fires

    Can some experts out there tell me how close a HWC must be to a modern wet back fire to make it worth while?
    Experience. What you get just after you needed it.

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    I was a Heating installer for around 10 yrs , I have a reasonable understanding of the limitations of wet backs . There are quite a few factors that come into play , so to narrow it down explain (or draw) what you want to do ? Also how many KW the Wetback or Booster is ?
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    Rule 7: Avoid alcohol and drugs when handling firearms

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    Member northdude's Avatar
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    i thought a wet back fire was a shart

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    Quote Originally Posted by northdude View Post
    i thought a wet back fire was a shart
    Took a second but I got it. Last thing I need though.
    Experience. What you get just after you needed it.

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    Agree with Munsey, everything has got to be in favour of a good result (so many variables) for it to be viable. The output of the heater, the position of the HWC, the size of your heater element, your water supply and the type of fuel you use, the amount of KW or BTU's required to heat your room space and how many KW your wetback booster will retard this.
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  6. #6
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    FWIW our one is on the other side of the hall so around 1.8m away

    Do it

    This year we are looking at turning the electricity off in the HWC for the winter/early spring as the wetback keeps it hotter and is good for about two days

    Others who do this report power bills down by around half over winter
    Old Kent tile side fire, just keeps on going
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    Mines about 2.5m away

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    you can also put your hwc in the roof space above the fire. Mate has one and turns of there hwc power all winter saves shit loads on power

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    Our HWC will be above the fire (on the second floor) and no more than 2m away horizontally. Havent decided on a fire yet but want something about 20kw and whatever we can get power wise for the wet back. I have been looking at a Masport R5000 (compliant) but am open to suggestions. We will be 750m AMSL so winters are a bit chilly.
    Experience. What you get just after you needed it.

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    Quote Originally Posted by Gapped axe View Post
    Agree with Munsey, everything has got to be in favour of a good result (so many variables) for it to be viable. The output of the heater, the position of the HWC, the size of your heater element, your water supply and the type of fuel you use, the amount of KW or BTU's required to heat your room space and how many KW your wetback booster will retard this.
    How does water supply effect it? We will have tank rain water.
    Experience. What you get just after you needed it.

  11. #11
    Sending it Gibo's Avatar
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    Gas, ditch the HWC

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    Quote Originally Posted by Gibo View Post
    Gas, ditch the HWC
    Too expensive. Not reticulated where we are. Plenty of wood though.
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    Experience. What you get just after you needed it.

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    Spring for some solar aswell and then turn ya power off all year round

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    Mine is upstairs above the fire, maybe a metre horizontal distance, 3.5m vertical. Know of another that is just through the wall behind the fire.

    Just make sure all the pipes are lagged

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    Quote Originally Posted by 223nut View Post
    Mine is upstairs above the fire, maybe a metre horizontal distance, 3.5m vertical. Know of another that is just through the wall behind the fire.

    Just make sure all the pipes are lagged
    Yeah, in a previous house we had an Ideal Standard "chip" heater with wetback in the kitchen. Hugely efficient. The HWC was thru the wall on a wooden plinth to ensure the HWC was above the wetback inlet and outlet pipes height to ensure circulation. Getting any sort of airlock in a wetback system can be nuclear. When we were building we had contemplated having the HWC across the passageway but was told it that time we would also need a hot water pump to get circulation.

    We were on a low pressure system with the long copper pipe up thru the roof. Once boiling we got the geyser effect on the roof of course. We lit our fire every day summer and winter and used no power at all to heat water. Kitchen got pretty hot in summer!

    Not sure what happens with a mains pressure system and a wetback - assume the pressure relief will be constantly blowing whilst water boiling, probably more annoying than a low pressure system spewing water out onto the roof and eventually discoloring the roof or in my case shagging the crappy decromastic tiles.

 

 

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