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    Thank you. Was that from MJ 8 AE? TLY

    Thank you. Was that from MJ 8 AE?

    TLY
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    Could someone define "purpose built daylight...

    Could someone define "purpose built daylight windows" for me? If extra windows were placed in a room to gain an added view of a lake, would these windows be considered "purpose built daylight...
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    Is this for all windows? TLY

    Is this for all windows?

    TLY
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    Blinds or No Blinds for Load Calculations

    When doing load calculations, what does Manual J say about blinds for new construction? Arguments can be made both ways whether to include them in load calculations on a new construction. You don't...
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    I have scheduled someone outside of my builder...

    I have scheduled someone outside of my builder and his subcontractors to give our HVAC systems an independent evaluation and to look at the things mentioned in this thread. Thanks everyone for your...
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    The return drop goes up and terminates into a...

    The return drop goes up and terminates into a 10'' x 20'' and goes two directions.

    The supply branches in three directions: 10'' x 13.5'', 8'' x 14', and 8'' x 8''.

    TLY
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    The return duct itself measures 14'' x 24''. ...

    The return duct itself measures 14'' x 24''. Does this pose a cfm restriction? Also, the supply leaving the furnace measures 16'' x 19'' and I am wondering if this is also a restriction. Thanks,
    ...
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    No, no one has looked at this. TLY

    No, no one has looked at this.

    TLY
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    Well the owner of the HVAC company came to the...

    Well the owner of the HVAC company came to the house and we discussed our cooling problems while standing in our 80 kitchen and he said he would redo tho load analysis. I do have a copy of the...
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    Is there any way I can check the size of the...

    Is there any way I can check the size of the piston myself? Maybe I need to have a second company come in and evaluate this stuff?

    The return duct comes down the side of the furnace and then...
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    Thank you. That is a good perspective and a...

    Thank you. That is a good perspective and a possibility because we do have a large walkout basement and many windows in our house. I think you are right in allowing for that possibility and not...
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    That's a good suggestion. I am near Louisville,...

    That's a good suggestion. I am near Louisville, KY. I started doing this a while back and went to the ACCA website and got a list of members. If you or anyone else has a Louisville reference I...
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    Oh, I only can wish that my contractor had such...

    Oh, I only can wish that my contractor had such an approach. I'm afraid they are just going to swap it out and see what we get and I'm sure they will say that existing line will be just fine.

    TLY
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    I'm not sure I'm ready to gut a brand new system...

    I'm not sure I'm ready to gut a brand new system at my expense. We are happy with the upstairs heat pump and it works just fine.

    TLY
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    I believe my indoor coil is rated for 4-5 ton...

    I believe my indoor coil is rated for 4-5 ton capacity. Is it a 4 ton only? With my current setup, I was told it was common practice to have an indoor coil larger than the capacity of the outdoor...
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    This concerns me that the planned fix for my...

    This concerns me that the planned fix for my cooling problems is so rarely a proper solution. Do you have any recommendations for me?

    TLY
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    Uh-hmm, did you read my previous post about my...

    Uh-hmm, did you read my previous post about my contractor and the lottery?:) I need to find some answers outside of my contractor.

    I wasn't so much looking for specific equipment recommendations,...
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    72°. Why do you ask? Hmm, this just...

    72°. Why do you ask?



    Hmm, this just puzzles me. My contractor said the same thing. Could you explain to me how by only changing the outside heat pump from a 3.5 ton to a 4 ton without...
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    I'm trying to look at everything like that...the...

    I'm trying to look at everything like that...the HVAC has been out many times looking and adjusting and they have determined the 3.5 was undersized. They are going to change it to a 4 ton at their...
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    I guess I am confused with need for the exact...

    I guess I am confused with need for the exact equipment to determine the load. For example, the HVAC-Calc program available from this site does not require specific equipment. The two other load...
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    Nobody has said that it can't, but I really do...

    Nobody has said that it can't, but I really do not know. I just assumed the air would be colder...does changing from a 3.5 ton to a 4 ton increase the air flow?

    Currently, on a summer day the...
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    Good point...say the latent gain for each was...

    Good point...say the latent gain for each was 3500 Btuh.

    TLY
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    I was hoping someone could give me an answer like...

    I was hoping someone could give me an answer like "the first three values require a 4-ton unit and a 1-1/8in line, and the last two values require a 5-ton unit and a 1-1/8in line" or "all values...
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    I have been considering a window film...

    I have been considering a window film (3M-Prestige Series, PR 70) to help with our solar heat gain problems.

    TLY
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    Yes, the new calculation came back needing a...

    Yes, the new calculation came back needing a 4-ton unit. I haven't seen this report, but did ask if it was a Sensible + Latent calculation or a 75% Sensible load calculation. The new company said...
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