Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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  1. This is west of Tucson, half way to Ajo. This...

    This is west of Tucson, half way to Ajo.
    This was installed by fully legal, fully licensed contractors.
    Homes built up until the mid 1980's would still commonly use asphalt shingles.
    The photos...
  2. Of all the populated areas in Arizona (based on...

    Of all the populated areas in Arizona (based on population, not land area), for R&R HVAC, about half require permits and about half do not. The contractor confused this location with the latter.
  3. Bets Anyone - How long until this falls through the roof...

    http://members.cox.net/rifter1/stand1.jpg
  4. You know, I'd never heard of this before. But...

    You know, I'd never heard of this before.
    But you are the second person today to suggest this solution. The other one was in person, over the phone.


    a) if it's sooted up, it had incomplete...
  5. Thread: Sq Ft per ton

    by rifter1
    Replies
    17
    Views
    4,734

    Well, if you're in a fairly steady climate area,...

    Well, if you're in a fairly steady climate area, and homes are all fairly identical, rules of thumb can work. But let me throw a wrench in this for ya:

    Arizona.

    Yuma, AZ: 400 ft above sea...
  6. The last time I had to check the City of North...

    The last time I had to check the City of North Las Vegas for a permit, their requirement read as follows "Manual J is required, and if the result is not 400 sq ft. per ton, you must explain why in...
  7. http://members.cox.net/rifter1/chino/DSC02982.JPG...

    http://members.cox.net/rifter1/chino/DSC02982.JPG
    Well it's a low voltage safety switch in series with all the other low voltage safeties. What it does exactly and why it was installed are some of...
  8. No combustion air and combustion area under...

    No combustion air and combustion area under negative pressure.
    Flames will reach back into the burner compartment.
    Originally not converted for Propane (ran all last winter). Recently someone...
  9. How many things can you do wrong on a furnace installation?

    First, a propane tank. And no, the furnace was not originally converted for propane use. I got a call because "the manual reset switch keeps tripping".
    ...
  10. One of the tricks with the Infinity Control is: ...

    One of the tricks with the Infinity Control is:

    a) it does check duct static pressure every time it runs. If it thinks the reading is high, it will assume you need to change your filter. If the...
  11. If you do your manual J load calculation on a...

    If you do your manual J load calculation on a computer, you can see the effect on the cooling load by simply changing the factors.

    1) Change your attic insulation from R30 to R49 and see what...
  12. Replies
    130
    Views
    7,990

    The question I answered related to fuel...

    The question I answered related to fuel consumption.
    Yes it's more comfortable with a 2-stage system.

    You would not believe the difficulty people in general have in believing that a 2-stage...
  13. Thread: R22 versus Pur

    by rifter1
    Replies
    6
    Views
    853

    First, here is a quote from the manual: "The...

    First, here is a quote from the manual:
    "The FB4A is the standard fan coil. It comes in a prepainted galvanized steel casing with foil-faced insulation and has a 3-speed motor in the full range of...
  14. Replies
    130
    Views
    7,990

    There has been a study done on this already by...

    There has been a study done on this already by the University of Berkeley. The .pdf currently resides on the Department of Energy website. The Government of Canada has acknowledged the results (I...
  15. How bad is a totally horizontal flue? Does it cause cracked heat exchangers?

    Yes.

    http://members.cox.net/azcoolguy3/DSC02784.JPG

    http://members.cox.net/azcoolguy3/DSC02785.JPG
  16. Funny enough, there wasn't enough air for...

    Funny enough, there wasn't enough air for combustion.
    Remember, fuels have a lower and upper combustibility limit.

    With natural gas, it's about 4.3% and 14%. Fuel-air mixture outside that range...
  17. Yep the Carrier furnaces (like this one) can...

    Yep the Carrier furnaces (like this one) can automatically stage themselves.

    IF you set the jumper correctly on the furnace board (see manual).

    Otherwise it's a multi-stage furnace and you may...
  18. Customer messing with orifices and gas pressur... do YOUR customers do this?

    A very old/unusual residence for Arizona:

    http://members.cox.net/azcoolguy3/egr/DSC02603.JPG

    The new Propane tank that was installed for our Dual-Fuel setup:
    ...
  19. I force my installers to pull permits now. ...

    I force my installers to pull permits now.

    The inspector called me from the home. Along with his electrician that he called out for the special occasion.

    My installers, (AND I QUOTE) state...
  20. That was the second nicest house in the town.

    That was the second nicest house in the town.
  21. Those new Trane condensers are so tall they stick up higher than my house...

    http://members.cox.net/azcoolguy3/sanmanuel/DSC02261-j.jpg




    This is totally unrelated but I found it very amusing...
    This is NOT a Federal Facility FYI:
    ...
  22. Arizona fabulous install - Small Town, Big Problem

    This is the ENTIRE electrical panel:

    http://members.cox.net/azcoolguy3/sanmanuel/DSC02222.jpg

    http://members.cox.net/azcoolguy3/sanmanuel/DSC02223.jpg

    The 50 AMP breaker is powering the...
  23. Replies
    30
    Views
    4,921

    I suppose you aren't referring to the little...

    I suppose you aren't referring to the little window unit on the white house?
  24. In most places in Southern Arizona the cooling...

    In most places in Southern Arizona the cooling load is so much higher than the heating load that a heat pump does not require heat strips. That's also because of the winter design temperature being...
  25. When I first started posting here it was a matter...

    When I first started posting here it was a matter of sheer shock at what I was seeing.

    Then it was more of a celebration of understanding complex technical issues... "WHY" things happen badly....
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