Posted by T_Bone on December 20, 2008 at 07:08:35 from (4.254.164.89):
In Reply to: Re: Pics posted by Janicholson on December 19, 2008 at 22:06:10:
Hi Anthony,
Adding humidification too 50%rh will make a human feel like you turned up the t-stat 4ºf during the heating season. If you were at 50%rh then you would need to increase the room too 85%rh for the average human to feel the difference.
The controls shown in your pics are common to the industry and easy obtained at any HVAC supply house.
If the existing unit was 80% efficient and a new unit was 90% efficient with a utility bill of $150mth that can be applied just too room heating, then it would cost approx $75yr more to heat with the existing unit.
You have a can of worms with the existing unit as I'm pretty sure there will be some asbestos in the gaskets alone and maybe in the plenum wrapper. This will require special permits and a company certified in asbestos removal too remove this unit and dispose of the hazardous waste. The homeowner will be temporary relocated until the work is completed.
You would confirm updated State/Federal laws on asbestos as I've been retired too long.
How bad is asbestos? I worked with a engineer who took some field measurements on some asbestos piping. Unknown to him, he was highly allergic too asbestos and 6mths latter he was dead from fibers that he had inhaled during the measuring.
Plan "B" might be a choice here. Leave the existing unit alone and start thinking of adding dedicated room heating if needed.
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