Search:

Type: Posts; User: 54regcab

Page 1 of 20 1 2 3 4

Search: Search took 0.04 seconds; generated 7 minute(s) ago.

  1. Thread: Lennox sizing

    by 54regcab
    Replies
    13
    Views
    489

    If your 2,000sqft house is leaking 90k BTU of...

    If your 2,000sqft house is leaking 90k BTU of heat, FIX THE LEAKS and install a smaller furnace. 90k leakage on 2000sqft is going to be some large easy to find/fix leaks.

    REDUCING LEAKAGE is what...
  2. Replies
    135
    Views
    4,779

    Anybody else notice the lack of residential...

    Anybody else notice the lack of residential central AC in other countries?

    Power harmonics are going to become a REAL problem when commercial is required to use ECM to meet government Sales EER...
  3. A smaller unit constantly blowing cool air does...

    A smaller unit constantly blowing cool air does make if feel cooler. 75f almost feels too cold if the AC is running constant with humidity levels at 40%. Run the ceiling fan and its comfortable at...
  4. 26 degrees indoor/outdoor difference is tall...

    26 degrees indoor/outdoor difference is tall order...
  5. Replies
    135
    Views
    4,779

    You can check caps in circuit with an esr meter....

    You can check caps in circuit with an esr meter. Measures the resistance at high frequency, tells you when the caps are dried up.
  6. Outdoor temps?

    Outdoor temps?
  7. Replies
    7
    Views
    298

    Its always good to have a 2nd method to serve as...

    Its always good to have a 2nd method to serve as a double check.
  8. Man J calculations are only as accurate as the...

    Man J calculations are only as accurate as the inputs. What design temps did they use?
  9. Replies
    135
    Views
    4,779

    The parts would have to be ordered from somewhere...

    The parts would have to be ordered from somewhere like Mouser, customer would still have to wait to get AC back running again. A basic furnace board with a bad relay could easily be repaired IF you...
  10. Replies
    7
    Views
    298

    Some charge by outdoor temp/saturated condensing...

    Some charge by outdoor temp/saturated condensing temp differential. 30 degrees for 10 SEER, less for higher SEER systems. On TXV systems I've seen some charge by low side SST, adjusting charge to get...
  11. Replies
    38
    Views
    1,500

    Sadly coils are rarely ever pulled for cleaning,...

    Sadly coils are rarely ever pulled for cleaning, no matter how nasty they are.
  12. Replies
    135
    Views
    4,779

    http://www.gwm4-3phase.com/uands/static1.htm Not...

    http://www.gwm4-3phase.com/uands/static1.htm
    Not sure if it would have the grunt to start a compressor or if the voltages would be compatible.
  13. Thread: Unit sizing

    by 54regcab
    Replies
    3
    Views
    230

    Sounds like they used the generic 500sqft per ton...

    Sounds like they used the generic 500sqft per ton rule when the system was first installed. Nobody wants to stick their neck out by installing a smaller size and risking a complaint that the new...
  14. Once you get the humidity problem fixed you...

    Once you get the humidity problem fixed you probably won't need a 70 degree setpoint to stay comfortable. How much has stage 2 been running since your system was installed? Outdoor temps?
  15. How about dumping the multispeed "feature" of PSC...

    How about dumping the multispeed "feature" of PSC motors to hit the EER numbers. Multispeed PSC motors take a hit due to poor stator winding density and high resistance rotor "windings". A single...
  16. Replies
    38
    Views
    1,500

    If the Blower Wheel is nasty, the A-coil probably...

    If the Blower Wheel is nasty, the A-coil probably is also. Often the system is OLD, is it worth all the labor involved to clean blower & pull the A-coil on a system that's 10-15 years old? Or is the...
  17. Replies
    135
    Views
    4,779

    It's going to take something bigger than a few...

    It's going to take something bigger than a few blower motors to cause an issue. SMPS has been used in TV's and most electronics for decades. When VFD compressors become commonplace I might can see...
  18. Replies
    135
    Views
    4,779

    The bigger deal is all this fancy stuff doesn't...

    The bigger deal is all this fancy stuff doesn't save money on utility costs. Tighter houses amd smaller units are what really saves $$$.
  19. Replies
    25
    Views
    1,810

    Have you investigated why your house has such a...

    Have you investigated why your house has such a high heat gain? Consider sealing the house and installing a smaller unit. If the Insulator/air sealer does a good job you could get away with a single...
  20. Replies
    12
    Views
    484

    Germans pay 2X - 3X what we do for energy, just...

    Germans pay 2X - 3X what we do for energy, just like most of Europe does. Green energy makes sense over there because conventional sources aren't subsidized by government (aka taxpayers).
    ...
  21. Replies
    12
    Views
    484

    Too much emphasis is placed on "the box" and not...

    Too much emphasis is placed on "the box" and not the installed system. If you REALLY want to save the planet, set limits on the max BTU per sqft that can be used and force the builder/homeowner to...
  22. Thread: Lennox sizing

    by 54regcab
    Replies
    13
    Views
    489

    How many KWH were you using per month in winter?

    How many KWH were you using per month in winter?
  23. Most contractors don't give proper credit for...

    Most contractors don't give proper credit for "tight construction" when entering man J calculations. Buying a smaller mid SEER (14-16) AC and tightening up the house will save more $$$ and increase...
  24. Replies
    135
    Views
    4,779

    High SEER units don't save any money on utility...

    High SEER units don't save any money on utility bills compared to 14-16 SEER mid efficiency units. High SEER units are almost always oversized which takes away much of the efficiency advantages. Look...
  25. Thread: Lennox sizing

    by 54regcab
    Replies
    13
    Views
    489

    How many KW was the old electric heater? I...

    How many KW was the old electric heater? I haven't seen them over 20KW which is the same as a 70k gas furnace.
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event