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  1. tom in maine
    Post

    Concept for DIY Furnace

    I never bothered to measure combustion zone temps. I relied on color of the firebrick and what wound up in there being melted. One evening two glass...
    Post by: tom in maine, May 17, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  2. tom in maine
    Post

    Concept for DIY Furnace

    We used to use high temp thermocouples or handheld laser thermometers for combustion zones.
    Post by: tom in maine, May 16, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  3. tom in maine
    Post

    Concept for DIY Furnace

    I would start with looking at Dick's entire paper. And then blending in what you are interested in doing with Rocket stove design. Rocket stoves as a...
    Post by: tom in maine, May 16, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  4. tom in maine
    Post

    Concept for DIY Furnace

    As Ian (and Dick Hill) said, you just have to cut and try. We (Dick and I) did that a lot and ate a lot of smoke along the way. The first drawing you...
    Post by: tom in maine, May 14, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  5. tom in maine
    Post

    Concept for DIY Furnace

    The issue I see is the amount of pressure drop that the refractory zone before the chimney has. The exhaust is going to slow down and lose flow up...
    Post by: tom in maine, May 14, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  6. tom in maine
    Post

    Concept for DIY Furnace

    If you look at Dick's original paper, that design can be upscaled with reasonable success. The Rocket stove design you posted will have issues with...
    Post by: tom in maine, May 12, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  7. tom in maine
    Post

    Tesla "best car ever driven" by Consumer Reports

    And they are an American car company!! We sold their director of technology (JB Straubel) a heat storage system this year. Great guy, doing amazing...
    Post by: tom in maine, May 11, 2013 in forum: The Green Room
  8. tom in maine
    Post

    eps or epx foam under slab

    Interesting thread. I keep remembering things. Guess I am getting old... The groover I made did about three feet wide with tubing slots every 6". The...
    Post by: tom in maine, May 1, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  9. tom in maine
    Post

    eps or epx foam under slab

    We have done several floors with foam on top of the slab. We (and some others) have grooved polystyrene foams and put tubing in the grooves. I had...
    Post by: tom in maine, Apr 30, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  10. tom in maine
    Post

    eps or epx foam under slab

    So, I will throw out a pet theory on foam underneath slabs: The Passiv Haus guys and others are using a LOT of foam under slabs. We all have seen or...
    Post by: tom in maine, Apr 30, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  11. tom in maine
    Post

    eps or epx foam under slab

    Dan, I am not a structural engineer either. I do refer to them when I need to. Fortunately, we have a really good one who answers my questions at the...
    Post by: tom in maine, Apr 29, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  12. tom in maine
    Post

    eps or epx foam under slab

    I derive some income from selling foam. I have been associated with a number of companies over the years. A couple thoughts/comments from my...
    Post by: tom in maine, Apr 28, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  13. tom in maine
    Post

    Tempering/Mixing valve for DHW

    Use something that is spec'd as an antiscald valve. Honeywell AM series or similar. The standard cheap Watts or Taco mixing valves are not safe for...
    Post by: tom in maine, Apr 15, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  14. tom in maine
    Post

    Is a Heat Pump the way to Go?

    They used to use washing machine hoses, then they got religion.
    Post by: tom in maine, Apr 7, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  15. tom in maine
    Post

    Is a Heat Pump the way to Go?

    We have tied the Geysers into larger tanks. I see no reason that they cannot be used with pressurized storage-this is just a larger volume like a DHW...
    Post by: tom in maine, Apr 7, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  16. tom in maine
    Post

    pressurized vs. non-pressurized storage

    Although I make my living manufacturing coiled DHW hx's, I would like to add that if you want to produce a sidearm hx, a single pass one, without...
    Post by: tom in maine, Apr 2, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  17. tom in maine
    Post

    Is a Heat Pump the way to Go?

    Marc had been in touch when he did his first study. It is interesting that low usage brings the COP down. I think that the HPWH also makes sense as a...
    Post by: tom in maine, Mar 31, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  18. tom in maine
    Post

    Is a Heat Pump the way to Go?

    There are other units. The AirTap is one that I have tried. It is a bit klunky in that it uses a very thin hairpin copper heat exchanger that goes...
    Post by: tom in maine, Mar 31, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  19. tom in maine
    Post

    Is a Heat Pump the way to Go?

    Here in Maine, it is reasonable to think that a HPWH is going to save 50% on DHW.(could be more) It can be tied to a Superstor. I think the average...
    Post by: tom in maine, Mar 31, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
  20. tom in maine
    Post

    hydronic staple up floor for efficiency.

    I live with low mass radiant systems in every room but the bathroom, where we used Gypcrete to level the floor. Given the low heat load, things work...
    Post by: tom in maine, Mar 29, 2013 in forum: The Boiler Room - Wood Boilers and Furnaces
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