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Type: Posts; User: thunderbirl

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  1. Replies
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    I'm also replacing my furnace/AC in upstate NY. ...

    I'm also replacing my furnace/AC in upstate NY.

    In my old home (in another state) I had a perfectly sized two stage furnace with variable speed fan. In the winter, it ran often and long - All...
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    What to do with old furnace and A/C?

    My 90+ Rheem furnace (120K input) is being replaced as is a 5 ton, 10 SEER Rheem AC unit. These were original with the house and have been used for only 6 or 7 years. They work fine, but they don't...
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    I appreciate what you're saying...The thermal...

    I appreciate what you're saying...The thermal conductivity of materials limits the ability to take up heat and re-establish the new steady state thermal gradient. If you heat up too fast, the wall...
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    Design temp is 0F. 922 BTUHs/degree seems to...

    Design temp is 0F.

    922 BTUHs/degree seems to be seems to be 60000/65.



    OK to here...
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    Load calc was 59000 BTU/hr... what do I do with...

    Load calc was 59000 BTU/hr... what do I do with that??
  6. Replies
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    1,231

    Rate of heat rise calc....

    I'm installing a furnace that is 2/3 the size of my present one. I like to let the winter temperature go down at night and during the day when I'm not here. However, I like to get up to a house...
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    Motoguy128 has targeted the issues that i wanted...

    Motoguy128 has targeted the issues that i wanted to get to!

    So I'm thinking dig down, several inches of crushed stone (just like under my garden walls), cinder blocks in the middle (I learned how...
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    One suggestion was a "pump up". Is this...

    One suggestion was a "pump up". Is this something used to raise up a heat pump??
  9. Replies
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    AC Pad "foundation"

    I'm putting in a new four ton Carrier AC unit and would like to have the pad raised up above the ground by several inches to a foot. I'd like to have the base of the unit out of the snow in the...
  10. gary_g. Thank you! This also shows me that...

    gary_g. Thank you!

    This also shows me that BTU output falls with temp.

    I'm spec'd for a 60K BTU furnace at a design temp of 0F. So at half way between 68F and 0F, I need half the heat output,...
  11. I have to thank you all for helping me work...

    I have to thank you all for helping me work through this - particularly Motoguy128!

    Let me clarify that I was trying to indicate that I use 300 therms only for 1/2 of March and then April through...
  12. Realistic Dual Fuel Heat Pump Economics???

    It was suggested that I look into a heat pump in a dual fuel set-up for my home in Rochester NY rather than an A/C and furnace set up.

    Either way we have a 58 MCV/355CAV furnace with variable...
  13. We will have a VS blower (58MVC/355CAV is current...

    We will have a VS blower (58MVC/355CAV is current target).

    Never had zoning, but it seems quite logical, so I guess I'll have to look into it! (I think it can be added later!)

    I've asked and...
  14. A single stage A/C will circulate the air better???

    We're putting in a new furnace with a low speed fan that I intend to run all the time. I'd like the two story house to be comfortable, i.e., all one temperature. I've lived here for three summers...
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    This has been terrific reading! To clarify - ...

    This has been terrific reading!

    To clarify -

    In my current set-up (which is one option for the new system), the evaporator coil on the furnace is about 4 feet below the compressor in the a/c. ...
  16. Replies
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    AC lines under concrete??

    Our current noisy A/C unit is about 75 feet from the furnace in the full sun on the south side of the house right near the living space.

    I'd like to know what it would take to relocate about 50...
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    Scroll vs. Reciprocating Carrier A/C

    I have two quotes from Carrier (plus others) and noticed that the Carrier A/C that was recommended in both is a two stage (my preference for comfort) with reciprocating compressor vs. scroll.

    My...
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    Furnace Exhaust/Intake and Wasps

    My old furnace is going away shortly. The intake/exhaust lines are being re-routed to be about 25 ft (vs. 75 ft!). They will vent through the side of the walkout basement - about 8 feet above the...
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    I've gotten in touch with a very knowledgeable...

    I've gotten in touch with a very knowledgeable dealer who speaks my language as well as a homeowner with the Infinity.

    Carrier's Infinity T-stat drives the 58MVC series based on the difference...
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    Thank you all! I've learned more here today...

    Thank you all!

    I've learned more here today than I have in two weeks of talking to the shops in town. Of course, I realize that I'm talking to people here with technical interest and...
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    I suspect that your reference to "recovery from...

    I suspect that your reference to "recovery from setback" would be for an "Energy Management Recovery" (Rheem) or "Smart Recovery"(Carrier) mode. I'm not planning on using that feature as I hate...
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    Thanks for the quick responses. Just to...

    Thanks for the quick responses.

    Just to check - Is what I'm hearing from both of you is that the amount of time needed for the system to "adapt" to the house and its heat loss is a matter of...
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    "Intelligent" thermostats?

    I'm looking at a new system to replace an old one that is 2X too big per Manual J. The two major choices for replacement are driven by Carrier Infinity and Rheem Contour (mod) thermostats. These...
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