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  1. Replies
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    I think the reason air handlers can 'survive'...

    I think the reason air handlers can 'survive' with the small filters (the rack comes attached to the unit) is because the only resistance to the airflow is the coil. Unlike a furnace which has a...
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    Larger coils are used to increase the efficiency...

    Larger coils are used to increase the efficiency (SEER) of the equipment. The problem (as I see it) is that the coils run warmer and do not dehumidify as well. So the consumer has to turn the...
  3. You're getting conflicting reports on the need of...

    You're getting conflicting reports on the need of additional returns or not. Both should have explained to you (in detail) their reasoning. They are (supposedly) the salesmen and need to be...
  4. I'm sorry that you misunderstood my thoughts...

    I'm sorry that you misunderstood my thoughts regarding your problem. I am not siding with the contractor. I would suggest getting a second opinion to see what options can be done.
  5. Transfer grilles do not have to go in the doors. ...

    Transfer grilles do not have to go in the doors. I agree with you in that I wouldn't put them in the doors. They can sometimes go above the doors or you could have one large grille in the 2nd floor...
  6. That's what I was thinking, but, if the home is...

    That's what I was thinking, but, if the home is finished, can you imagine the cost (and mess)! Plus, do you think the HVAC contractor will run the proper sized flex? Or will he use 6" flex and...
  7. You're short of RA (return air) right now! ...

    You're short of RA (return air) right now! Technically, only (1) properly a sized RA is needed as long as there are transfer grilles in all the rooms (except the bathrooms) that can be isolated with...
  8. I would bet that it's an airflow problem, for...

    I would bet that it's an airflow problem, for sure. It happens all the time, particularly, with bonus rooms. They are very difficult to heat/cool.

    To do it right from the start costs money and...
  9. They normally run 1 pipe to reduce the job cost. ...

    They normally run 1 pipe to reduce the job cost. Sometimes only one pipe can be run, however. I agree with the other posts, 2 pipes are preferred (if possible) by the pros.

    My dad used to say,...
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    If it's A/C only, I don't see a problem. The...

    If it's A/C only, I don't see a problem. The cold air will drop very quickly while the warm air is rising. I just don't like the supply location.
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    I've seen where contractors will install small...

    I've seen where contractors will install small zone dampers to 'bleed' the air or adjust the dampers not to close all the way (again) to bleed the excess air.

    This is not how zoning should be...
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    When I hear that a furnace or air handler is in...

    When I hear that a furnace or air handler is in the garage (or above the garage, as in your case), the first thing that comes to my mind is that the ductwork is probably too small.

    My...
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    After you clear the drain line, and you still...

    After you clear the drain line, and you still have a leak, it could be that your coil is freezing and then thawing. In a hot attic this can occur. The water can by-pass the drain pan.
  14. I would recommend getting the new(er) Arzel Heat...

    I would recommend getting the new(er) Arzel Heat Pump Pro 4……….depending on the age of your Arzel AirBoss. The HPP4 has the ability to 'weigh' the airflow to each zone.

    Call Arzel with any...
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    All are great points and it is frustrating that...

    All are great points and it is frustrating that so many of them can be ignored and the systems continue to run, at least for a while. When the homeowner finally becomes aware that they have...
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    We sent our responses about the same time. I...

    We sent our responses about the same time. I must just type slower…….:) Great minds think the same!
  17. Replies
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    The one that is sized and installed correctly and...

    The one that is sized and installed correctly and a solid company that will stand behind the installation. Be more concerned with those three things. A HVAC company chooses a wholesaler that will...
  18. If the existing flue is being used only by the...

    If the existing flue is being used only by the existing furnace, then the PVC pipes could be run thru the flue. An advantage of a sealed combustion furnace is that they are more quiet than a 80%...
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    What size system (now) takes care of the 'high...

    What size system (now) takes care of the 'high ceiling' living area and what size system takes care of the bedrooms/office?
  20. If it's a double wall flue and if your W/H vents...

    If it's a double wall flue and if your W/H vents into the same flue, you should be fine. 80% furnaces should be relatively close to the flue and also be vented (with a good rise) with double wall...
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    16" @.08 is actually 1350 CFM. I realize that...

    16" @.08 is actually 1350 CFM. I realize that flex has more resistance, but the length of flex is only 12'. Ductulators S.P. (ratings) are based off 100' of ductwork. I said it was close. I've...
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    If the all the doors remain open, only one return...

    If the all the doors remain open, only one return air grille (properly sized) is needed. The 16" flex is (border line) too small. The bigger problem is the 18"x23" grille. It's rated for just over...
  23. I can certainly visualize your set-up. We have a...

    I can certainly visualize your set-up. We have a lot of town homes that are similar. The fact that your 2nd floor has some exposure has a little bit more bearing on the load but not that much.
    ...
  24. Is your condo 'sandwiched' between two other town...

    Is your condo 'sandwiched' between two other town homes? If so, a 1.5 ton might do a better job. A 2 ton won't run long enough to cool the 2nd floor.
  25. You're right, the Carrier Infinity zoning doesn't...

    You're right, the Carrier Infinity zoning doesn't need a by-pass. Their less expensive options (if still offered) do sometimes require a by-pass if they can't 'dump' the excess air somewhere else.
    ...
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