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my company is saying 15'-20' of flex is okay...
Although all my runs are probably @ 10' with the exception of 1 run.

I was going to go with hard duct and then when looking at how the runs would...

:confused:Any thoughts on using Nashua 557 tape on new sheet metal ducts??
Thanks!

These are the plastic kind that clip on to the drywall, there is no screws

I am not doing it myself. and had asked all the questions before I choose the company. This is an either or option they are giving me and am just looking for consensus...that's all and what is...

I am using sheet metal for the new runs into each room.

Should I use flex duct in the last 1' - 1.5' that attaches to the registers?
Hart & Cooley Rezzin registers

Couple of reasons the...

Are plastic or metal registers the best? Does it matter?

Fuel source is gas
I don't know what my electric rate is? How do I find this out?

Then it sounds like round is best so we dont create draft

Please elaborate.
round if it is where?
rectangle if it is where?
Thanks,

Which is better Round or Rectangle/Square Registers?
I have a primary heat source for now (radiant heat)

Which is better round or rectangle registers??

They will be ROUND registers since I have a lot of can lights in my rooms. He also thought the way the air comes in with a round register it hugs the ceiling more than if it was a rectangle/square...

he said he did a manual J
and when he designs the ductwork he will do a sizing or I guess a load calculation

True calculation of new space is 425 (just measured) It was a space that was there but we were cooling it with a wall/window unit, because the 3 ton never would cool it down. We now are adding duct...

I was concerned with the diff in quotes of 3.5 ton vs 4 ton.
I had 4 quotes that used 4 ton and only the Lennox guy used 3.5 ton.

Should I be concerned that 3.5 ton is not enough. Currently we...

Ok, so if it is calculated that it only needs one, then it is okay.
One sales person said yes we would put 2 or 3, and the other said when I do my sizing if it only needs one then that's all we will...

Where would register placement in rooms be located?

I have a large master bedroom with 1 small window, 1 large double window (8' long) and a 6' sliding glass door - should a register be placed...

I was concerned with the diff in quotes of 3.5 ton vs 4 ton.
I had 4 quotes that used 4 ton and only the Lennox guy used 3.5 ton.

Should I be concerned that 3.5 ton is not enough. Currently we...

I am also using this with my radiant heat. So this furnace is a secondary unit for now.



G60UHV 60C-110
XC15-042



Coil: CH33-50/60something (couldn't read letter either C or L)2F

:confused:Looking for input on the two different proposals

Here are the final proposals, both are reputable companies so my decision is between these two:

IS THERE ANYTHING ELSE I SHOULD ASK OR GET A COMPARISON??? both can start right away.

Lennox ...

Good point Thanks,
They did say it was a Manual J (I think) and he took into account our new sliders and insulation.

THERMAL thanks

Does it need to be wrapped ao all 4 sides? Or only 3 sides if it is in my attic. I also intend to blow in insulation after for my attic itself.

This is a residence, and they have 2 divisions to handle either or.