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Old 04-14-2011, 03:13 PM   #16
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Cold Basement


You need a cold air intake at floor level to take advantage of using the existing system if it has the duct system. Obviously, you need properly sized ducts and a variable speed fan on a new system really works well and is cheap to run. You don't need a lot of air flow, but you do need circulation for long term comfort.

I assume a finished basement has some provision for air flow and heat if you have a finished basement. I was lucky because I could use the xisting ceiling for supply and add returns on the walls near the floor level. - The utility room was separate and had an outdoor fresh air intake duct despite being 30 years old. - Otherwise, it was a place with the classic "split entry" problem and a 8'x10' chimney/stairway to suck up warm air and pull down the cooler air.

Dick

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Old 04-14-2011, 09:30 PM   #17
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Cold Basement


ahrens -

If you have no cold air supply directed into a utility room and you have done some sealing, you could be drawing air in from the exterior (attic, ducts, etc.) and it will settle in the lowest area unless you manage the air flow/circulation.

Pay no attention to itsreallyconc since he never seems to like my avatars and does a pretty good job and found the flaw of the one of me in a NASCAR car. This was not my younger wife's car, but I am busy saving up for $243,000 cash downpayment for the privilege of waiting about 18 months for the privilege of being measured and then waiting about 6 months or more to approval before shipment to the U.S. - Quite a hassle for a 2 seat road car powered by VW with a top speed of 268 mph (fastest road car in the world) and then being allowed to pay the remaining $2,200,000+ being turned over. - 268 mph to zero in 10 seconds with tires still intact. He really does know his concrete from the ground up.

aherns - Just another thought - how old is your furnace and do you have a variable speed fan you can run continuously? You may be near the end of life its was original. You can get a 80% or 90% furnaces with a variable speed, which many be much more efficient than an original with 60-65% efficiency.

Dick

Last edited by concretemasonry; 04-14-2011 at 09:40 PM.
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Old 04-15-2011, 11:50 AM   #18
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Cold Basement


The furnace has lots of supply air, that is not an issue at all. It is very old though, the home inpector couldnt even give me an exact year on it its that old. We are saving up for a new HE furnace for before the next winter. Whether that will make a difference or not who knows. The best thing about our problem is that summer is coming and the temp difference could be a good thing when it gets to 30 degrees celcius.



Also Dick that looks like a sweet ride......
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Old 04-16-2011, 01:17 PM   #19
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Cold Basement


The problem is the floor. You need to insulate it.

Unfortunately I don't know the best materials to use.
__________________
Stop wasting time re-adjusting the pattern. Have several lawn sprinklers, one for each pattern.

Last edited by AllanJ; 04-16-2011 at 01:30 PM.
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Old 05-01-2011, 07:22 AM   #20
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Cold Basement


If you are going to replace your existing with a new unit then a competent HVAC guy should be able to balance it correctly to even things out. Baseboard heating could be a good choice if you don't replace everything, good units could provide nice even heat to get the best bang for your buck.
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Old 05-01-2011, 02:10 PM   #21
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Cold Basement


OK your rim joist area is insulated , is it just fiberglass as most are.

You could have cold air leaks getting past it.

Spray foam or glued up XPS , I have 4" of xps and covered with roxul,

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