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Old 07-28-2012, 08:07 PM   #1
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I would like to change. Out the air handler on my heat pump, is it going to be much more involved than changing out the blower and motor...

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Old 07-28-2012, 09:14 PM   #2
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Electric air handler?

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Old 07-28-2012, 09:18 PM   #3
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not exactly what you are meaning. your air handler would be the whole inside unit. It is a lot harder than chaning out the blower. you will have duct, high voltage, low voltage, drain line, and refrigerant lines to disconect and adapt the new air handler to them. It is really not a job for a non pro.
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Old 07-29-2012, 12:06 AM   #4
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I'm having problems with low air volume in my upstairs rooms, I'm thinking that if i increase the motor speed from 1075 rpm to 1600 or 1750 that this may help my problem
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Old 07-29-2012, 12:28 AM   #5
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You're going to need to increase all duct work as well and get a bigger condensing unit if you do that. If you don't your system will suffer from a high static pressure which coincides with less heat extraction due to poor refrigerant saturation in the evaporator. High static pressure means poor air flow.

Increasing the fan speed past what the ducts are designed and installed for will have the opposite effect of what you're thinking it will. It'll be comparable to blowing as hard as you can through a coffee straw, why the ducts would have to be increased as well.

Might be a better idea to install dampers at the duct take offs at the plenum. This way you can close off the dampers on the ducts that have high air flow forcing the air to the upper rooms.
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Old 07-29-2012, 12:35 AM   #6
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Old 07-29-2012, 07:17 AM   #7
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Most of your problem is probably under sized duct work. Work on fixing the duct work. And you won't need to go to a higher HP blower motor, and have loud air noise from your duct work.

Might also check to see how clean your evap coil is or isn't.

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