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  1. Replies
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    That helps, thanks guys. :cheers:

    That helps, thanks guys. :cheers:
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    765

    need Armstrong igniter advice

    Looking at an Armstrong 80 GUJ100D12-2B furnace that's not igniting but I am unfamiliar with the hot surface ignition system. Just trying to determine if it's the gas valve or igniter, What kind of...
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    Thanks for your help! That's got me on the right...

    Thanks for your help! That's got me on the right track. :tank:
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    3H/2C

    This is quite common on geo systems and I would think on most air source HP's.
    Generally you would have a two stage compressor with two stages of heat and two of cool & 1 back up. I'm pretty sure...
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    How did you get that number? That sounds close to...

    How did you get that number? That sounds close to what I would guess it should be, the range hood is going through about 14ft. of 4" round with 6 elbows (don't ask, i didn't do it). Doing a formula...
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    help with measuring airflow

    I am having trouble measuring duct airflow, I took a ventilation course and it seemed so easy but in the field I have never been able to replicate the procedure done in the classroom.

    For example,...
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    3,360

    thanks!

    all right, thanks for the info!
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    18
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    3,360

    my count is on his way.

    my count is on his way.
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    3,360

    I am the HVAC contractor, I know I need an...

    I am the HVAC contractor, I know I need an in-line fan and make-up air heat too however the customer got a second opinion from the building inspector who said he only needs a damper & timer and i...
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    So what do people usually do in this situation?

    So what do people usually do in this situation?
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    Does anyone know any brand or trade names for a...

    Does anyone know any brand or trade names for a pressure switch or a kit for such an application? I'm sure this isn't an odd situation, it's just i've never run into it before.
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    how to interlock make up with range hood?

    So we are working on a new home still under construction, we have roughed-in a HI-V air system and 6 individually vented bath fans (no HRV) in addition the customer has a 550 CFM range hood and I'm...
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