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  1. The house is a sieve for 2011 construction if the...

    The house is a sieve for 2011 construction if the inputs are accurate, tighten up the house. Inputs are often fudged to get the "magic 500sqft per ton" that some contractors like the computer to spit...
  2. 1500sqft of 2011 construction shouldn't need more...

    1500sqft of 2011 construction shouldn't need more than 2 tons to cool it unless you live in the desert. I have 2tons cooling my own 1999 1600sqft home in Oklahoma.

    I'd look at a dumping the zone...
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    Odds are good that you only need a 40k furnace,...

    Odds are good that you only need a 40k furnace, but Trane doesn't offer one with a big enough blower to handle your 2.5 ton AC. Most other manufactures do offer a small furnace with a big enough...
  4. http://acrightsize.com/index.php

    http://acrightsize.com/index.php
  5. My home is 1600sqft 15yr old "average insulated"...

    My home is 1600sqft 15yr old "average insulated" home has a 2ton (800sqft per ton) and will keep it 75f indoors until the outdoor temps hit triple digits. A "well insulated" home in CT should need...
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    If you want more even temps in your house and...

    If you want more even temps in your house and don't have the budget for a modulating furnace, go with a smaller system that more closely matches the load. Most furnaces are 2x-3x the size needed and...
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    991

    You should have the coil cleaned so you won't be...

    You should have the coil cleaned so you won't be breathing whatever gunk is in there.
  8. Where are you located? I've not seen this on...

    Where are you located? I've not seen this on residential yet.
  9. Replies
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    991

    For a 50k furnace to be belching out 150f degree...

    For a 50k furnace to be belching out 150f degree air i suspect airflow is VERY restricted. Have your HVAC tech check the evap coil/blower wheel.
  10. The government will just tax you more in order to...

    The government will just tax you more in order to keep energy costs out of your utility bill. We only pay about 1/2 of the cost of energy in our utility bills, they other 1/2 is paid in government...
  11. Here's the actual AHRI spec...

    Here's the actual AHRI spec See page 24.

    MFG expanded data charts make a lot more sense to me, if they are available..
  12. How many KW was the old heater and how many BTU...

    How many KW was the old heater and how many BTU for new furnace?
  13. SEER is rated at 80f indoors/82f outdoors, most...

    SEER is rated at 80f indoors/82f outdoors, most systems will be operating on low stage under those conditions. Most systems will be on HIGH during 80f/95f indoor conditions, look at EER.

    Look at...
  14. Sticky: Or at least put the specs on your open website.

    Or at least put the specs on your open website.
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    Be sure it's ducted properly to the outside,...

    Be sure it's ducted properly to the outside, solid pipe normally gives the best performance.
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    370

    Look up the AHRI ratings for the exact model...

    Look up the AHRI ratings for the exact model numbers in your quote. The "up to xxx SEER" tends to be given to the 2 and 3 ton units. the 4 and 5 ton units often take a hit on the 'up to' SEER rating....
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    Think about what a motor is, iron and windings....

    Think about what a motor is, iron and windings. Per Fasco motor facts, stack diameter/height is the primary determining factor of the real HP of a motor. The ratio of turns and wire gauge determines...
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    Click the text in the post, it links to the...

    Click the text in the post, it links to the articles.
    Nope, automatic linking doesn't work for some reason.
    Just copy/paste in your browser and remove the spaces.

    http...
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    343

    A New Way to "Retire Early"

    Is age 50 the new 62 when it comes to "retirement"?

    It goes without saying, the older you are, the better chance you have of being awarded disability. Age 50 is the “cut off” point for claimants...
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    379

    Landlord doesn't want to spend any more than...

    Landlord doesn't want to spend any more than required to get it working.
  21. Replies
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    360

    FWIW my house is 1600sqft with a 44k (40k output)...

    FWIW my house is 1600sqft with a 44k (40k output) furnace. It's been down to 10f degrees last winter and never runs more than 2/3 of the time. At 37f it only runs about 1/4 of the time.

    Watch the...
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    Old furnaces required 100CFM per 10K BTU, 80%...

    Old furnaces required 100CFM per 10K BTU, 80% needs 130cfm, 90%+ 150cfm. When replacing an old furnace with a 90%+ it needs 50% more airflow for the same BTU. Either a smaller furnace or more...
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    832

    ECM condenser motors could ramp up as the coil...

    ECM condenser motors could ramp up as the coil gets dirty in order to maintain airflow. ECM system could be used as part of a demand defrost system for heat pumps. When used with a full communicating...
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    832

    I tested my own furnace that uses the full 5.1...

    I tested my own furnace that uses the full 5.1 rated amps on high speed and about 3.5 amps on low speed. 1/3HP rated motor with a 10x8 wheel. Didn't check the other 2 medium speeds.
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    If you leave the fan on 24/7 a VS may pay for...

    If you leave the fan on 24/7 a VS may pay for itself, otherwise no. VS is more about comfort, airflow slowly builds up instead of a blast all at once when the blower kicks on.
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