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  1. The "Inverter" technology in the Mitsubishi Mr....

    The "Inverter" technology in the Mitsubishi Mr. Slim line seems very unusual, or not unique. Does anybody else use anything like it to give such a wide range of BTU output?

    Also, the relatively...
  2. Does anyone know of other brands at 1 ton? I...

    Does anyone know of other brands at 1 ton? I posted a separate item on duct-less units:
    http://hvac-talk.com/vbb/showthread.php?p=1865600#post1865600
  3. And indeed you can take a couple branches. I...

    And indeed you can take a couple branches. I verified this in the installation instructions. Two sizes available on two sides. That whole Mitsubishi Mr. Slim product line is very intriguing. ...
  4. Duct-Free Split System for 480 sq ft Expansion?

    Does any HVAC manufacturer with sales in the mid-Atlantic region besides Carrier provide something like Carrier's Duct-Free Split System? Who? Web sites? Any capacities between 12,000 and 18,000...
  5. Smallest Central A/C or Heat Pump with Lowest Capacity

    Hello everyone, my last post was in Jan 2007. Now I'm back for a new project, and it's great to see some of the old names here. We do not yet have a good, professional load calc on an architect's...
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    We are into our second season, and love the...

    We are into our second season, and love the Mendota. It is great for both style and heat delivery. We took the fan/blower option but do not run it a full speed. During the dealer's first...
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    As a fellow homeowner, and only if I liked the...

    As a fellow homeowner, and only if I liked the idea of dealing with that contractor for any system now and down the road, I would ask him if he and his crew have just come out of training by the...
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    That's a Heavy Duty Cord

    To clarify my original posting: the standard hardware store item rated at 60° Celsius would be a Major Appliance Cord, 14 Gauge, three wire, SPT-3, 15A125V/1875W.
    Al
  9. Replies
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    Can I safely use an extension cord rated at 60...

    Can I safely use an extension cord rated at 60 degrees Celsius?

    My Mendota gas insert came with an 8ft extension cord which is rated at 105 degrees Celsius (221° F). Under the firebox is a hard...
  10. Replies
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    I am trying to convince my son to invest in...

    I am trying to convince my son to invest in HVAC-Calc, but he is resisting the idea, thinking that the several dealers who happen to agree on sizing by rules of thumb are all correct. You all know...
  11. Back to BaldLoonie (and others). ...

    Back to BaldLoonie (and others).



    BaldLoonie uses the number 2TTR2030 which belongs to the XR12.

    I should have been more specific. The dealer used the number 2TTR4030A which does not exist...
  12. A Bryant/Trane dealer lists the following choices...

    A Bryant/Trane dealer lists the following choices for my son. My son is to pick a brand and refrigerant before the dealer makes a final proposal. This is for a townhouse. Comments please?

    ...
  13. Replies
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    1,921

    My son has a proposal for using a 3-ton...

    My son has a proposal for using a 3-ton evaporator coil with a 2.5 ton condensing unit in the 13 and 14 SEER range. I suspect the idea is to have better humidity control here in the mid-Atlantic...
  14. Replies
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    820

    My son has a proposal for an XL14i. I have an...

    My son has a proposal for an XL14i. I have an XL19i. I understand Comfort-R.

    What is it about the single stage 15i that allows Comfort-R? In the literature, there is no mention of Comfort-R...
  15. Replies
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    4,206

    My son is getting bids for a new system in his...

    My son is getting bids for a new system in his townhouse, 13 or 14 SEER. HVAC dealers are recommending R-410A instead of R-22. This comes from the Carrier and Bryant guys of course, but also from...
  16. Replies
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    1,745

    Go by what works in your room, both summer and...

    Go by what works in your room, both summer and winter. Try things out for yourselves. The business of pushing air down in summer and up in winter is just a starting point.

    In our house with...
  17. Replies
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    Does the Bryant "Fan On Plus" feature for...

    Does the Bryant "Fan On Plus" feature for continuous fan control the fan speed only when there is no call for heating or cooling? Or does it override the variable speed performance that you would...
  18. Replies
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    1,115

    For best control of humidity in a townhouse, does...

    For best control of humidity in a townhouse, does the Evolution Control do anything better than the Thermidistat? If so, what?

    With the Bryant Plus 80v Model 315A gas furnace, the Evolution...
  19. What does the "SmartEvap" feature do that the...

    What does the "SmartEvap" feature do that the Thermidistat does not do by itself with older model furnaces?

    In the Bryant mid-line Preferred Series gas furnace, The Plus 80t Model 312, the control...
  20. Replies
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    My son has a proposal from a Bryant Factory...

    My son has a proposal from a Bryant Factory Authorized Dealer for a Puron system that says they will "reconnect all existing copper refrigeration tubing from the condenser to the evaporator coil."
    ...
  21. Replies
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    1,121

    Going a little deeper here, the Bryant literature...

    Going a little deeper here, the Bryant literature on their web site, including the .pdf document indicates that the CK5P series is for Puron, the "P" also indicating that. The description includes...
  22. Replies
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    1,121

    Do the Bryant CK5P series evaporator coils have...

    Do the Bryant CK5P series evaporator coils have both a TXV and the "Check-flo-rater" (with a piston)? If so, what does the "Check-flo-rater" do?

    The literature describes all Bryant evaporators...
  23. Replies
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    Re: wood vs. wood vs. wood

    Wondering about chromium carbides, I pulled up these links.
    http://www.engineersedge.com/wwwboard/messages/298.html
    and
    http://www.corrosion-doctors.org/MatSelect/corrstainsteel.htm
    When I tore...
  24. I have used silicone caulk for holes where...

    I have used silicone caulk for holes where electrical wires come up from between the walls. And I could use duct tape and foam gaskets for three junction boxes for ceiling fans and a hanging lamp. ...
  25. uktra, I just reviewed your earlier post. There...

    uktra, I just reviewed your earlier post. There are no HVAC ducts in the attic. My insulation is R-11 fiberglass blankets. I understand the benefits of going to R-32 or higher, that I would save...
  26. Heat is two ways. Primary is the gas furnace,...

    Heat is two ways. Primary is the gas furnace, now a Trane XV80. Secondary is going to be a Mendota gas insert just installed in our masonry fireplace. It replaces a great old Lopi wood insert that...
  27. Thanks perpetual_student, Jax, and uktra. The...

    Thanks perpetual_student, Jax, and uktra. The more I look at this and talk with the local roofers, I know the best I can do is to run Lowes' Reflectix foil/bubblewrap under the rafters in the part...
  28. Do any roofing and building supply companies in...

    Do any roofing and building supply companies in or near Northern Virginia carry aluminum radiant barrier materials for contractors to use? I have visited about a half dozen and talked with the major...
  29. Replies
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    Last year when I was checking on things for my...

    Last year when I was checking on things for my daughter who lives in Maryland, I called the Trane 1-800 number and got a call back from one of the regular Trane contractors in my daughter's area.
    ...
  30. Thread: vent free

    by alinnova
    Replies
    47
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    5,181

    I'm a homeowner who just had an insert installed....

    I'm a homeowner who just had an insert installed. After checking the major brands on the internet and in the local stores, including Travis Industries (Fireplace Extrordinair, Lopi, and Avalon),...
  31. Replies
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    I saw this after my previous posting. So with...

    I saw this after my previous posting. So with Trane, you would sacrifice 2,600 BTUH sensible advantage in the 037 to gain 900 latent with the 040, a bigger difference than with A-S.

    More...
  32. Replies
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    So, after getting the Manual J sensible and...

    So, after getting the Manual J sensible and latent head loads, the contractor should explain to the homeowner the tradeoffs between the several condenser/evaporator combinations and the impacts of...
  33. Replies
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    I'd be interested in seeing the latent heat...

    I'd be interested in seeing the latent heat capacity of those two combinations; I expect the less efficient combination does a better job on latent heat. Do you have those numbers? Thanks.
    Al
  34. Replies
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    If you are talking about running the blower...

    If you are talking about running the blower continuously, many pros here say that brings more humidity into the house. One source is the evaporator coil itself and the pan beneath which usually...
  35. Replies
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    Thanks for the clarifying replies. Are there...

    Thanks for the clarifying replies.

    Are there any scroll OEMs other than Copeland for residential HVAC?
    AL
  36. Replies
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    My son is getting ready to replace a system in...

    My son is getting ready to replace a system in his townhouse.

    The Copeland Scroll UltraTech features two stage operation where the first stage works at 67% of full load. About a month ago,...
  37. I'm a homeowner, non-pro. That is part of it. ...

    I'm a homeowner, non-pro. That is part of it. But where's the boss in this picture? He lets the installers go out of the shop without the training and without the specific instructions on how this...
  38. Replies
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    845

    Another home owner here, non-pro. Maybe this...

    Another home owner here, non-pro. Maybe this would void the HVAC warranty???

    Aside from that, check the CFMs that whole house fans pull and compare that to the CFMs of the HVAC blower, there is...
  39. quote: Originally posted by teddy bear How do...

    quote:
    Originally posted by teddy bear
    How do air distribution systems deal with 1/2 air flow yet deliver the air evenly throughout the structure? Seems like the supplies closets to the fan get...
  40. Replies
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    In multi-story houses, the intelligent way is to...

    In multi-story houses, the intelligent way is to have a good zoning system that will properly regulate or close dampers to the first floor or other "cooler" areas and direct the air to the second...
  41. Replies
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    Things can change. But digging deep into the...

    Things can change. But digging deep into the copies that I made of the papers stored inside the condenser unit, I find that sheet 2TTZ9-UP-1, Functional Unit Parts Split System Cooling, date...
  42. Replies
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    I just looked at the Service Experts, Inc. web...

    I just looked at the Service Experts, Inc. web site and their "100% Satisfaction Guaranteed." Also, noticed their parent being Lennox International Inc.

    You have to give your contractor time to...
  43. Replies
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    That 5-ton condenser probably pulls a lot more...

    That 5-ton condenser probably pulls a lot more juice on startup than your old unit. The HVAC and the dryer must be on separate circuits, each with their own circuit breaker. I assume you did not...
  44. Replies
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    2,048

    Homeowner here again. To me, the numbers mean...

    Homeowner here again. To me, the numbers mean the 5 ton is the wrong way to go. The 3.62 ton line tells me to go for a 3 1/2 ton system. The 4.16 line tells me to go for a 4 ton system. Both...
  45. Replies
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    Does this apply equally to the two stage scroll...

    Does this apply equally to the two stage scroll systems and to the dual compressor units? I am very happy with the latent heat capacity with the Trane XL-19i which has a 1.2 ton first stage...
  46. Replies
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    2,048

    I am a homeowner with a two stage Trane XL-19i in...

    I am a homeowner with a two stage Trane XL-19i in Northern Virginia with summer climate much like yours.

    With your load calc at 4.2 tons, I would look at what other changes you may make in the...
  47. Replies
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    7,234

    What about three or more stages in the near...

    What about three or more stages in the near future? My contractor said this is coming.
    Al
  48. Replies
    17
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    7,234

    As a home owner with a Trane XL-19i air...

    As a home owner with a Trane XL-19i air conditioner in its third summer, I am very happy with the dual compressor configuration. This is a nominal 3 ton unit, with the first stage at 1.2 ton and the...
  49. Replies
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    Very interesting thread that nicely explains why...

    Very interesting thread that nicely explains why my Trane XL19i A/C with the Trane XV80 furnace, with both have the ECM or "variable speed" fan and blower motors work so nicely.

    Two years ago, my...
  50. Replies
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    Hmmm , just curious, what does the gas company...

    Hmmm , just curious, what does the gas company use underground?
    Al
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