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DIY Solid fuel furnace

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  • DIY Solid fuel furnace

    I have just been round to my neighbours place.
    He designed and built his own solid fuel furnace (We call them boilers) and provides all his home heating. He tells me he has saved a fortune on oil.
    Their is an automatic air damper fitted which closes off the air as the heat builds up. An over heat situation causes the damper to close altogether.

    He didnt reveal how he designed the auto air damper and told me it is relatively simple . I didnt ask as I know he would not tell me.
    He has manufactured a few of these furnaces and sold them. He,s quite an ingenious bloke.

    Could anyone shed any light if possible on what kind of mechanism ( capable of withstanding high temperatures) causes a lever to move back and forward as the furnace heats and cools ?

  • #2
    Re: DIY Solid fuel furnace

    an air bellows, (like a poultry wafer) if the damper was well balanced. and very light,

    there are hydraulic bellows that move a control rod via temperature,
    or some type of closed hydraulic system and a cylinder

    and possibly some type of BI metal spring, like in some thermostats or thermometer but much larger,

    those are some mechanical ways of doing it, and of coarse there are sensors and micro processors and the like.

    http://secure.thebbqguru.com/Product...?idCategory=49
    here are some that uses a thermostat like unit that runs a draft fan, on a different application, but similar,

    as far as a safety you could use a high heat wax or low temperature solder that will melt if to hot releasing a spring loaded shutter closing off the air supply,
    some kind of by metal switch that would release a similar shutter, or an electronic system,
    Push sticks/blocks Save Fingers
    ~~~~~~~~~~~~~~~~~~~
    "The true measure of a man is how he treats someone who can do him absolutely no good."
    attributed to Samuel Johnson
    ~~~~~~~~~~~~~~~~~~~
    PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

    Comment


    • #3
      Re: DIY Solid fuel furnace

      here are some patent drawings, of how others have devised the ideas,
      Thermostat for stoves
      http://www.google.com/patents?id=ay4...117824#PPA5,M1

      Bi-metallic control device
      http://www.google.com/patents?id=4CA...41770#PPA48,M1

      THERMOSTATIC DRAFT-REGULATOR
      http://www.google.com/patents?id=n64...lators#PPP1,M1

      THERMOSTATTC DRAFT REGULATOR AND SYSTEM
      http://www.google.com/patents?id=0oJ...ators#PPA71,M1

      CLEANING UP WOOD HEAT FOR 1982-83 (no drawings but explanations)
      http://www.motherearthnews.com/DIY/1...r-1982-83.aspx

      or
      http://www.google.com/patents?um=1&q...Search+Patents

      do your own searches, put in key words and see what comes up.
      http://www.google.com/patents?um=1&q...Search+Patents

      and remember jsut because some thing is a patented Idea does not mean it is a good idea, or realistically workable, there are a lot of poor ideas, that have been patented, but the patent is good for (17 years normally) and after that it is open to the public.
      http://utrf.tennessee.edu/tto/docs/Patent_Overview.PDF

      An other simple way is to use a thermostat and a fan to induce draft, and use with a high temperature furnace cut out switch, wire it up and when heat is called for it kicks on the fan, if it get to hot the hi limit switch will kick out the fan, (put a shutter on the fan to get a good average on the basic heat), even using a two fan system that would work like a two stage system one kick in if more heat is needed the second would kick in or a solenoid would open up a second shutter system,

      With adding electricity to the mix the variables are much more open of processes to explore and to work with,

      jsut like any thing your inventing you will need to test it and determine it suitability for use, and safety issues.
      Push sticks/blocks Save Fingers
      ~~~~~~~~~~~~~~~~~~~
      "The true measure of a man is how he treats someone who can do him absolutely no good."
      attributed to Samuel Johnson
      ~~~~~~~~~~~~~~~~~~~
      PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

      Comment


      • #4
        Re: DIY Solid fuel furnace

        Many thanks for the reply . Most helpful.

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