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  1. Replies
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    In the service business, it really is about 360....

    In the service business, it really is about 360.

    Since it is seasonal, the business plan should take into account the spring and fall business shoulders.

    Bankers like to see profitability in a...
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    As so many here have put it, your business owner...

    As so many here have put it, your business owner hat must grow to match your technician hat.

    How many new installs and how many service calls a year to run the business? How do you divide the 250...
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    The requirement is for hardpipe even in...

    The requirement is for hardpipe even in non-seismic areas.

    If the tubing is pushed into the edge of the cabinet, the flex is not strong enough to prevent dents and leaks.

    A household with kids...
  4. Hard start kit on the heat pump?

    Hard start kit on the heat pump?
  5. The new HVAC may be more sensitive to waveform...

    The new HVAC may be more sensitive to waveform distortion than the old HVAC.

    You might try to add more linear load to the generator by turning on more old-style electric lights.

    If you have a...
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    shophound You're totally w... , no, wait,...

    shophound

    You're totally w... , no, wait, can't argue with you.

    But let me add, uh, uh, nothing to add.

    Dang.
  7. Replies
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    Thanks, mik597, good stuff to know.

    Thanks, mik597, good stuff to know.
  8. Replies
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    21,938

    Marvin Besides getting rid of scale, what...

    Marvin

    Besides getting rid of scale, what other maintenance is there unique to the Freus?
  9. Replies
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    mik597 Thanks for taking the time to post...

    mik597

    Thanks for taking the time to post hints and kinks on the Freus.

    The filter trick is a good one.

    What controls did you change out, high or low pressure or other?
  10. Replies
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    Check out the residential applications at Florida...

    Check out the residential applications at Florida Solar Energy Center:

    FSEC-PF-337-98
    FSEC-CR-1475-04

    Different roofs measured in Cocoa, Florida.
  11. Replies
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    There's no doubt that white metal roofs work in...

    There's no doubt that white metal roofs work in hot climates. A number of folks have taken data including Florida Solar.

    There is a combination of things going on which includes heat absorbed, and...
  12. Replies
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    Not harming the roof. Forget whether that was...

    Not harming the roof.

    Forget whether that was measured by FSEC or someone else, but the temperature rise was 5 deg F.

    But offset that by reducing the inside attic temperature, and overall...
  13. Poll: Short answer, yes. With the typical Plano...

    Short answer, yes.

    With the typical Plano house, it needs radiant barrier. With composite shingles and OSB roof sheathing, additional thermal mass in the attic should be minimized.

    If you put...
  14. Poll: It is 97% clean and out of the box. Really more...

    It is 97% clean and out of the box. Really more like 85% radiation blocking. It will payback for you. If you put in the radiant barrier, the load calculations should be adjusted for it.



    The...
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    443

    What bootlen said. 1. Get a Manual J for heat...

    What bootlen said.

    1. Get a Manual J for heat and cooling load. Manual D and Manual T for ducts and terminals. Then you will know what it needs to be.

    2. If you don't have radiant barrier, get...
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    Manual D and Manual T.

    Manual D and Manual T.
  17. Replies
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    The emissivity of a radiating surface runs from 0...

    The emissivity of a radiating surface runs from 0 to 1, with 1 fully radiating. Plywood has an emissivity of about .85, and the radiant barrier about .15.

    Broadside to the surface is maximum...
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    This may seem counter-intuitive, adding the...

    This may seem counter-intuitive, adding the insulation may have increased the heat holding capacity of the attic. Before you added the insulation, did your A/C shut off about midnight? This summer is...
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    Sorry about your discomfort. It would be best...

    Sorry about your discomfort.

    It would be best not to mention "lawyer" to the builder until they quit cooperating. The system is geared to protect the builder, not the homeowner.

    There may have...
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    Supposedly Manual J overestimates the load a...

    Supposedly Manual J overestimates the load a little.

    Reduced cooling at high temperatures, and sensible to total heat, those kind of factors belong in the Manual S calculations.

    At least in my...
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    You do understand the fan curve for an ECM?

    You do understand the fan curve for an ECM?
  22. Replies
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    My copy of Manual D has 15 boot fittings with...

    My copy of Manual D has 15 boot fittings with equivalent lengths.

    Manual D was written before the laptop computer was available. Fittings were given equivalent lengths for ease of computation....
  23. The first thing that comes to mind is the gallons...

    The first thing that comes to mind is the gallons per minute rate of the heater. You would need to figure the Btu/hr needed and see if you have enough water flow to transfer enough heat.

    The next...
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    Soda straw effect. Which component has the...

    Soda straw effect.

    Which component has the most drag on the whole system? If already limited by compressor or evaporator, then improving the condenser will not have a noticeable effect.

    TXV is...
  25. Replies
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    The reason someone hires a tradesman is 1) the...

    The reason someone hires a tradesman is 1) the trade will do it right, 2) the trade will do it more efficiently, 3) the trade is likely to have specialized tools to speed and do the job properly. As...
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