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Type: Posts; User: jimbo48236

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    I vote if it is a single story zone and resize...

    I vote if it is a single story zone and resize the unit (a 3 ton might be more correct but for goodness sake get an HVAC person to do a Manual J calculation). If it is a two story I say buy another...
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    Most scientific heat transfer formulas use the...

    Most scientific heat transfer formulas use the Kelvin scale. Theoretically at zero Kelvin all atomic motion is stopped (no vibrating). This link uses Kelvin for the Stefan-Boltzmann calculations. ...
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    The gentleman was concerned about over heating...

    The gentleman was concerned about over heating the attic. I also am not certain if the cost of moving the air out is really going to be that much. Most new fan motors use very little energy (about...
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    Uktra. I am talking about the Suns radiation. ...

    Uktra. I am talking about the Suns radiation. Radiation is heat transfer by the emission of electromagnetic waves which carry energy away from the emitting object. For ordinary temperatures (less...
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    Radiation coming from our sun is less during the...

    Radiation coming from our sun is less during the winter months. As the earth tilts away from the sun we go from summer to winter and get shorter days. The atmosphere actually acts as a barrier...
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    I did close off all my downstairs vents less my...

    I did close off all my downstairs vents less my added on family room. It helped but didn't fix the temp difference.
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    I'm leaning that way

    I am think of adding the addition separate unit for the upstair. Trying to zone the existing duct work and system would be a lot of tear up. I want comfort, then energy effiency. The booster fans...
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    Manual J Calculations

    To do a heat gain/loss you should use an HVAC manual J. The problem with manual J is it is very time consuming, and you need to understand a lot about the house to do it accurately.

    I agree...
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    You're on the right track

    I am not an HVAC contractor, but I am a Mechanical Engineer. I think all of what you said could work; my recommendation is a temperature controlled gable vent fan. Should only open up and run when...
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    Thanks

    I did put one window unit in my master bedroom, but I plan on keeping the house for the next 20 years. I guess my question is now, will air boosters be enough? The house heats fine in the winter,...
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    The question I have is what can I do to get more...

    The question I have is what can I do to get more AC in the upstairs bedrooms? The ground level cools to 74, but the upstairs is always 6 to 10 degrees hotter. I have asked several friends for...
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