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  1. Replies
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    Propane is a refrigerant - R290, so it follows...

    Propane is a refrigerant - R290, so it follows the pressure/temperature rules that all refrigerants follow.

    As long as there is some amount of liquid in the tank, the pressure depends on...
  2. Current AHAM rating standards for all...

    Current AHAM rating standards for all dehumidifiers (portable and whole house) are at 80°F and 60%RH.

    I maintain 71° 41% in my 1890's stone foundation basement in SE WI using a 65 pint Perfect...
  3. I just went through this same thing earlier this...

    I just went through this same thing earlier this summer. I live in SE WI and have always used 2 portable dehumidifiers in my unfinished basement. Boiler room, and 2 adjacent rooms (800 sq ft) were...
  4. Thread: hot tub

    by aemeeich
    Replies
    18
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    1,274

    I built my own hot tub back in 2005. I used 1x6...

    I built my own hot tub back in 2005. I used 1x6 cedar that I tapered, beveled, and tongue & grooved. Then I cut up a 15' pool liner into the 66" diameter bottom and glued it back together to fit...
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    3,453

    The main difference is modulation. Even a...

    The main difference is modulation. Even a properly sized CI boiler is oversized every day of the season except for the few hours at design temp. And that's assuming you can even get a CI boiler...
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    3,453

    There are a couple of reasons a mod/con will save...

    There are a couple of reasons a mod/con will save more than the 10-12% the AFUE would suggest.

    First, as others have said, AFUE isn't a great measure of the true efficiency of the system. It...
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    1,963

    Your size comparison is a little bit off. Two...

    Your size comparison is a little bit off. Two 1/4" hoses are actually only half the area of a 1/2" hose.

    The cross sectional area of a 1/4" hose is 0.49087 sq in.
    Therefore two 1/4" hoses would...
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    1,272

    A modulating valve on the water side of a system...

    A modulating valve on the water side of a system can cause problems in some piping setups. First of all, baseboard will put out pretty similar outputs over a very broad range of flow rates. You...
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    654

    Not to be picky, but you don't have a furnace. ...

    Not to be picky, but you don't have a furnace. You have a boiler. A furnace blows hot air though ducts, a boiler heats either water or steam.

    The NTI Ti150 is a modulating condensing boiler. ...
  10. Replies
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    1,693

    The humidity offset setting won't work in my case...

    The humidity offset setting won't work in my case because the error in humidity display on my stat isn't linear. At lower temperatures its correct, but at higher temperatures it's wrong. Changing...
  11. Replies
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    1,693

    Correct - The remote sensors need to be in a...

    Correct - The remote sensors need to be in a series/parallel configuration in order to maintain the resistance characteristics that the stat sees.

    So you would need either 1, 4, 9, 16, 25, 36,...
  12. Replies
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    1,693

    I just put in a IAQ stat at my church and it is...

    I just put in a IAQ stat at my church and it is doing the same thing as yours, although not quite as bad. When the AC is running, and the temperature in the space is below 74 degrees, the humidity...
  13. Replies
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    1,384

    I suspect that the radiator fan clutch needs to...

    I suspect that the radiator fan clutch needs to be replaced.

    A thermal fan clutch changes the speed of the fan based on the temperature of the air coming through the condenser/radiator. When...
  14. I use Firefox, and the links here still don't...

    I use Firefox, and the links here still don't change colors. They do on every other site I visit though, so it is something specific with hvac-talk. I remember for a while they did change color,...
  15. Igniters do occasionally go bad. They don't...

    Igniters do occasionally go bad. They don't regularly fail though.



    If the boiler starts right back up as soon as you add water, that's not the igniter causing problems. It is the LWCO,...
  16. Replies
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    1,362

    I would recommend a heat pump mini split that is...

    I would recommend a heat pump mini split that is based around an inverter compressor. This technology is very efficient - 20 seer for some brands. They also modulate their capacity so that they are...
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    That heat loss of 166000 seems too high to me for...

    That heat loss of 166000 seems too high to me for new construction. It works out to be 29.9 BTU/sq ft. As a comparison, my 1890's farmhouse with 1964 remodel has R13 walls, R19 ceiling (soon to be...
  18. Replies
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    The new Honeywell TrueZone panels (HZ432 and HZ...

    The new Honeywell TrueZone panels (HZ432 and HZ 322) can be set up for one of three different options - 2 stage thermostat, % of zones calling, or timer.

    It also has a setting to downstage if the...
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    You are correct da_poppa - only steam systems...

    You are correct da_poppa - only steam systems should be sized by connected load. Water systems should be sized by actual heat loss.

    Many older houses are "over-radiated" now because of...
  20. Washing an exterior wall with conditioned will...

    Washing an exterior wall with conditioned will actually lead to higher heat transfer and thus increased fuel costs. Heat loss is driven by temperature difference. If it is 70 degrees outside, and...
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    I would still get the plasma and it would be the...

    I would still get the plasma and it would be the Pioneer 4280HD.

    In my opinion, the Pioneer models are the best looking and their pricing has come down alot recently to be close to other...
  22. Replies
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    Here is a post I made this past sumer - with some...

    Here is a post I made this past sumer - with some new changes added.
  23. Replies
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    726

    The Truezone system uses regular thermostats for...

    The Truezone system uses regular thermostats for each zone. They can be single stage stats, or multi stage - the zone panel can be configured to work with either type. Thus it has the standard...
  24. There is more to be saved than just the 10%...

    There is more to be saved than just the 10% indicates.

    The source of combustion air is not figured into the rated efficiency numbers. However, this is a big additional savings for the 90% unit....
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    Definitely replace it. Old high-mass boilers...

    Definitely replace it. Old high-mass boilers running at partial loads are very inefficient. Since you are on gas, go with a mod/con boiler. They operate at up to 98%. Your gas bills will drop...
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