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  1. Replies
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    Glad you could get your folks some cooling but...

    Glad you could get your folks some cooling but this site doesnt allow DIY help for the future, theres lots of things we can help you with but not anything that could possibly get you or your family...
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    If it works as you say then here would be the...

    If it works as you say then here would be the issue. Only the factory tstat is going to control its staging off incremental changes in temp and humidity in the space where the people are. A Nest,...
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    Lol, what if the whole thing bends inward?

    Lol, what if the whole thing bends inward?
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    Is it though? When was the evap and condenser...

    Is it though? When was the evap and condenser coils last cleaned, capacitors tested, contactor inspected, bearings inspected, refrigerant charge checked, etc?
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    I'm not that familiar with Comfortbridge but...

    I'm not that familiar with Comfortbridge but every manufacturer requires you to use their proprietary tstat with a variable capacity a/c or h/p, except for Bosch. The tstat has to communicate with...
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    If it's in such bad shape that wires are...

    If it's in such bad shape that wires are corroded, loose and falling off, then it's probably way overdue for an A/C PM
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    Identification usually. Every motor gets it's...

    Identification usually. Every motor gets it's own capacitor, but maybe they shared back when that old girl was made
  8. I remember a plumber telling me the hotel...

    I remember a plumber telling me the hotel industry found that people on vacation take a 33% longer shower than at their homes. I cant see your home from here but I wouldn't be buying minisplit...
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    Ask them to find out if it will be compatible...

    Ask them to find out if it will be compatible with it when it does come out, before signing a contract. If you want the comfort bridge what does the contractor suggest then?
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    1. Maybe, you'll find out in a day or so. 2. ...

    1. Maybe, you'll find out in a day or so.
    2. Is the one post connected to the other post with metal?
    Now call your mother, she worries!
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    Seriously do a manual J yourself, so you have an...

    Seriously do a manual J yourself, so you have an idea if bidding contractors are blowing smoke. Loadcalc.net and coolcalc are 2 online block load calls. I loved my 2 stage, but in


    Loadcalc.net...
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    Get to 5 more posts?

    Get to 5 more posts?
  13. Replies
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    How I could

    How I could
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    I wonder

    I wonder
  15. I take it your not doing this for economic reason...

    I take it your not doing this for economic reason as there wont be a break even for a long, long time. Personally I'd leave the gas water heater if this house is just an air bnb, nobody leaves good...
  16. A filter only achieves its filtration and rated...

    A filter only achieves its filtration and rated pressure drop at a given velocity. Most homes have systems oversized for what they need and duct systems unable to move that much airflow at all. ...
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    Most system breakdowns are a result of poor...

    Most system breakdowns are a result of poor install practices, especially true with the ducting system. Hardcast is a manufacturer of adhesives, I couldnt find any advertised products designed to be...
  18. Well if 50% is your max and its normally 42% go...

    Well if 50% is your max and its normally 42% go ahead and try leaving it at 50% blower speed and see what happens. I'd make sure it's set to 350 cfm/ton, you likely have to much airflow into your...
  19. I live in earthquake country and I cant...

    I live in earthquake country and I cant understand how they get away with putting it on blocks, unsecured like that in this area. I'm sure this is more the exception than the rule nationwide, but...
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    Honeywell Prestige IAQ

    Honeywell Prestige IAQ
  21. Years ago I was doing ice machine PM's at a...

    Years ago I was doing ice machine PM's at a brewery, set my 6-in-1 on top of a metal shelf and went up the ladder when I hear the tool rolling. I tried to grab it but I managed to slap it into a...
  22. 1st stage is 75% of 2nd stage capacity. No one...

    1st stage is 75% of 2nd stage capacity. No one has any control over that, I think your probably telling the tstat what speed for the blower to run in the off cycle (fan on). Blower on delay (I...
  23. There are different ramping profiles for the...

    There are different ramping profiles for the blower to come on that are set during install, at least you hope they were. You probably dont ever get out of first stage keeping your home at 80.
    ...
  24. It probably will transmit noise and vibration...

    It probably will transmit noise and vibration into the structure, usually everyone here hangs it from the truss so I haven't seen to many installed that way, but they were all noticeable to me. ...
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    What's your relative humidity in the house at 78?...

    What's your relative humidity in the house at 78? I like a nice, properly sized 16/17 seer 2 stage a/c. Really theres hardly any extra parts to break vs a single stage and there not based on...
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    Yes, Manual J to size the load. What's the model...

    Yes, Manual J to size the load. What's the model #'s of the indoor and outdoor units? Who is designing the duct layout? I'm thinking that room is going to need to be able to pull down temp real...
  27. If that outdoor fan fails in cooling, you'll know...

    If that outdoor fan fails in cooling, you'll know immediately. That thing will become a heater right quick an in a hurry. Youd have to know how many btu's your building gains or loses thru the year...
  28. If you have a take-off at the end of the supply...

    If you have a take-off at the end of the supply plenum it will cause you to lose airflow in all the take-offs coming out the side of the plenum, generally undesirable. Generally each a/h will have...
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    Did you encapsulate the attic in deep foam? I...

    Did you encapsulate the attic in deep foam? I have pretty serious doubts about that much airflow ever keeping you comfy, even if it was always calling.
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    Adaptive recovery is one of those things that...

    Adaptive recovery is one of those things that sound great in practice but I never enable it because of this exact reason.
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    I'd imagine you have more than one speed tap,...

    I'd imagine you have more than one speed tap, what's the model number of the airhandler? Has your static pressure been tested at it's current set-up? High static pressure will kill those constant...
  32. In Grant's Pass your probably going to size it...

    In Grant's Pass your probably going to size it for the heating load. Also I would guess most distributors only keep 2 ton equipment on hand, at least in my area. Loadcalc.net or Coolcalc is an...
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    A 2 stage a/c, if setup properly, will dehumidify...

    A 2 stage a/c, if setup properly, will dehumidify more than a single stage but is still limited to meduim to high heat loads to do this. It will do nothing during rainy days or mild days with high...
  34. If you understand that warranty wont cover you...

    If you understand that warranty wont cover you having a spare, then go ahead and find yourself a high ambient motor, usually they will sell these with ball instead of sleeve bearings and be rated...
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    Pecmsg is right, that's the best way to maintain...

    Pecmsg is right, that's the best way to maintain even temps floor to floor on a multistory. The other way to go is zoning, but so few companies do normal ducting well at all, let alone zoning, that...
  36. Thread: Air Filters

    by Makeitcold
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    What about a filter box at the plenum? A pair of...

    What about a filter box at the plenum? A pair of 2" filters in a > configuration built into the return plenum? I've got (2) 20302 Truaire HE filter grilles running Merv 10 filters for my 3 ton,...
  37. 2 floors=2 systems. Most people with asbestos...

    2 floors=2 systems. Most people with asbestos just get them wrapped so that nothing breaks loose, at least in my area. The problem you may have with that is the ducting may not be sized for today's...
  38. Unlikely that the tstats were the only thing to...

    Unlikely that the tstats were the only thing to be damaged, the other things just have died yet. A whole home surge protector and a voltage monitor for the equipment are both good investments as...
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    Not if its frozen up from lack of airflow. ...

    Not if its frozen up from lack of airflow. Plugged airfilter can bow inward allowing dirt to get by and get into the blower wheel and evap coil, requiring maintenance. Any if these can kill the...
  40. Broken tstat wire, bad connection, bad board, bad...

    Broken tstat wire, bad connection, bad board, bad module, bad flux capacitor. Probably take me 10 minutes with my meter to tell you, but I would have to have my meter. Have you had a spring a/c...
  41. Much of the country gets by just fine on...

    Much of the country gets by just fine on heatpumps, however most parts of the country are charged $0.10/keur. I dont know your rates, but in the land of 'bendover' PG&E rates, I wouldn't use one...
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    Oh hey, I remember this thread. I've never owned...

    Oh hey, I remember this thread. I've never owned any, tried to buy them but the part houses all told me they dont sell that product anymore. Insurance reasons were alluded to so I drew my own...
  43. I'd ask local businesses who they use and trust,...

    I'd ask local businesses who they use and trust, like your chain restaurants and hospitals. Usually, not always, they have tried all the cheap hacks and found it costs them to much money to be down...
  44. Please try doing a free manual J yourself at...

    Please try doing a free manual J yourself at Loadcalc.net and post your results, that is the only way to size equipment, anything else is a guess. Since home comfort is a function of ducting going...
  45. I didnt even bother reading the last post, I've...

    I didnt even bother reading the last post, I've got a friend in your shoes right now and as much as I would love to see you turn the screws on these hacks I'll tell you what I told her. They ain't...
  46. You can do what you like but I wouldn't braze it...

    You can do what you like but I wouldn't braze it and I hate flare connections. I've got 2 transducers that are leaking in the body on a 25-ton Carrier, fortunately Carrier was smart enough to use a...
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    Agree with ga hvac tech 100% on zoning with...

    Agree with ga hvac tech 100% on zoning with variable capacity equipment
  48. Replies
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    What I'm not understanding is this. Your manual...

    What I'm not understanding is this. Your manual j should have led you to how many cfm of airflow each room needs, then your ducting is sized to efficiently provide that without losing velocity. If...
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    Your contractor should know how much airflow your...

    Your contractor should know how much airflow your ducting can move, and its highly unlikely it ever moved 3.5 tons of airflow, so why do you think they are making you choose? Will this be zoned?
  50. I'd just use Tee's with nylog applied to the...

    I'd just use Tee's with nylog applied to the threads. LOTS of companies have these installed at their service valves wired to the alarm company due to condenser theft, been there for years with no...
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