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Type: Posts; User: amd

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    Basic things to know about two stage furnaces: ...

    Basic things to know about two stage furnaces:

    1. They have the ability to run at 60-70% capacity. The gas valve in two stage furnaces supplies gas to the burners at a lower pressure on low.

    2....
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    ^I'm no fan of ul actually -> selling an alarm...

    ^I'm no fan of ul actually -> selling an alarm which only goes off at 70ppm is crazy, but at least the better models display lower levels, right?

    I know that they've done similar things with smoke...
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    The cheapest kidde alarm on the market has an...

    The cheapest kidde alarm on the market has an electrochemical sensor: http://www.kiddecanada.com/utcfs/Templates/Pages/Template-53/0,8062,pageId%3D2725%26siteId%3D463,00.html

    Care to explain?
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    ^I don't think pressure has anything to do with...

    ^I don't think pressure has anything to do with it though - condensers run at much greater pressure than evaps do, yet leaks are rare, right?
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    Man, why does vb4 suck so much? The search in vb3...

    Man, why does vb4 suck so much? The search in vb3 worked great.
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    Google only finds things on the open forums...

    Google only finds things on the open forums anyhow. My things have been moved around.
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    Searching this board using google.

    Hi,

    I've found that ever since the software upgrade, the internal search doesn't always pick up all the threads it should and list them in the right order.

    Somethings I use google instead - ie...
  8. You can calculate heating BTUs more easily on the...

    You can calculate heating BTUs more easily on the water side; mass flow rate and temp differential required.

    I think accurately measuring cfm is tricky.
  9. Thread: Insulating 90's

    by amd
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    Keep the ductwork out of the damn attic - then...

    Keep the ductwork out of the damn attic - then you won't have to insulate 90s. :p

    Such installs should be illegal.
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    Try Hot2000 - simulates energy performance but...

    Try Hot2000 - simulates energy performance but also calculates load.

    Not a professional opinion:

    I can see a new, tight 2400 sq ft house built with r-20 walls only needing 42 000 btu/hr of...
  11. There's a video online of a guy testing sealants...

    There's a video online of a guy testing sealants in a sealed jar with water and refrigerant - the sealant never solidified; was just white goo.

    I would post it but youtube is frowned upon on this...
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    Why not just insulate the damn duct? I would have...

    Why not just insulate the damn duct? I would have been less work.
  13. If they go through with this, a lot of...

    If they go through with this, a lot of contractors in the south are going to start illegally importing cheaper 13 seer units from the north, and vice versa with furnaces.

    I read that they dropped...
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    nah - let 'em freeze; the players and spectators....

    nah - let 'em freeze; the players and spectators. Outdoor heat is stupid. :p

    Want to be warm? Go to an indoor event for god's sake. :rolleyes:
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    Sorry to burst your bubble, but if it's outside -...

    Sorry to burst your bubble, but if it's outside - what a waste! Seems as if people are very adept at finding new ways to waste energy when we need to do the opposite.
  16. How much do you get payed per kwh? Is it the...

    How much do you get payed per kwh? Is it the market rate or are there subsidies down there? (meaning it's done at the expense of others ;) )

    Financially there might be a good reason to go solar in...
  17. "Green Illusions is an environmental book that...

    "Green Illusions is an environmental book that pioneers a critique of clean energy, arguing that concerned citizens should instead focus on walkable communities, improved consumption, governance, and...
  18. Green illusions - if you're for solar energy, watch this...

    http://www.youtube.com/watch?v=--OqCMP5nPI

    <iframe width="560" height="315" src="http://www.youtube.com/embed/--OqCMP5nPI" frameborder="0" allowfullscreen></iframe>
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    There's one called r22(insert proper letter here...

    There's one called r22(insert proper letter here ---> x<---) which is sold in Canada. I think it's basically propane. :eek:
  20. ^best advice in this thread :)

    ^best advice in this thread :)
  21. (community) College is good if you find a good...

    (community) College is good if you find a good program and want to learn practical skills. I was just saying that many college programs attract not so good students.

    In Ontario, I think you can do...
  22. I have been through a technical program like that...

    I have been through a technical program like that (not a hvac technician program, and not at george brown)...

    Don't even think about doing the technician program - go for technology. The Ontario...
  23. Stupid question about leak sealents and sealed systems

    There's been a lot of talk about the negative impact sealants can have on equipment if the refrigerant is contaminated with moisture.

    Presumably small factory charged/sealed systems such as window...
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    <iframe width="420" height="315" src="http://www.youtube.com/embed/c7pNAhENBV4" frameborder="0" allowfullscreen></iframe>

    http://www.youtube.com/watch?feature=player_embedded&v=c7pNAhENBV4#!
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    ...sounds like those steam units are just like...

    ...sounds like those steam units are just like electronic air cleaners - good on paper, completely useless in the field.

    ...not to mention, using electricity to boil water whenever there's a call...
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