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Could be thermostat location. Also, it could be due to lack of insulation in your house.

Unless things have changed with Trane in the past 3 years, the blower runs at 50% of full air flow when the fan is set to on. Also the first 10 mins should be at 50% as well. Unless you are using...

It can as long as the blower capacity matches what the Geothermal unit requires. If the unit is rated using a variable speed blower, make sure the furnace has one.

No. You should contact an HVAC specialist in your area and let them tell you if they can shorten the piping. This is not a DIY site.

Call the factory and find a different vendor. The website may not have been updated in a while.

I would say dual fuel would be the way to go.

You would still want a heat loss/heat gain done on the garage. If you put too big of a unit in, it can lead to short cycling. Ductless mini splits are the way to go. The air handler is mounted on the...

I would suggest a zoning system. If there is access to the attic above both rooms, or at least 1 wall accessible from the attic in both rooms, then you could have a thermostat in both rooms....

It is possible for a coil to leak within 4 years. The model number and manufacturer name would help. Some manufacturers have a 10 yr part warranty, which would allow you to get other labor...

You need to edit your post. Discussing prices are not allowed. Read the rules.

What Daltex and Beenthere said.

Yes, but again I say, if his lifestyle changes and he wants both floors occupied, he will be sorry.

Loose connections would be my first thought. Either the spade connection, or where the spade connection is crimped on the wire.

Dash- I agree, you shouldn't plan for future owners. But I still stand by my opinion that it is not smart to replace 2 systems with 1 system. Then zone it, and hope that you never want the whole...

Yes, he does. He is also considering doing away with 2 systems, and going back with just 1 system with zoning.

I was just making points of why I would not recommend doing that.:cool:

So, when he sells the house and the new owner has a different lifestyle? Or if his life style changes? He can control the house the same way with 2 systems.

Agreed!!

One negative that I can think of by going from 2 systems to 1 system with a damper system, is breakdowns. If you have 2 systems and one has a problem, then at least you have 1 working system until...

First, I would make sure that they provide a Manual J heat loss/heat gain, and show the capacities of the chosen equipment.

I can only say what I've seen in my area for the rest. I would prefer my...

Hehe....too true:cool:

This is a link to Reducing Power Factor Cost. It is a US Dept of Energy document. It does a good job explaining what the Power Factor is. Also, how "real" power, "apparent" power and "reactive" power...

Cost for many consumers would be the deciding factor. Cost is almost always a factor. Even when you educate the consumer, they still look at the bottom line. In my area, metal duct has become rare....

Did Sears show you the heat loss? That would be the first question. Also, the ductwork will affect it as well. Is it insulated? Is your floor insulated? These things will have a direct bearing on the...

This is what matters when it is your business...agreed:D

I think the assumption was if a 1" space under the door is enough, do you need more? I don't think that more is always better, unless you are talking about the velocity of the air. A larger return...