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Old 05-13-2019, 07:38 AM   #1 (permalink)
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HVAC Experts, need a little help

I have a 2 story home with 2 heat/AC units. Both are forced air single stage.
One for the front of the house, thermostat upstairs for all rooms except 1 that is downstairs but works great.
Second unit heats/cools master bedroom downstairs and large family room upstairs in the back of the house. The thermostat is downstairs. The problem is the bedroom will be freezing or too hot before upstairs is even affected. Here is where I need the advice. Planning to get a zone panel, 2 thermostats (1 up, 1 down), zone dampers and a zone bypass damper. Seems pretty basic to install. I have read that the bypass could shorten the life of the unit. Too cold/hot going back through the return, too much air flow. Is this something I can tackle? Any insights on the bypass?
Quote of $3500 to have an expert do this and a second quote of $200 to come look at the system.
Thanks for any help.
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Old 05-13-2019, 09:23 AM   #2 (permalink)
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i just adjust my vents in the summer wide open upstairs/down stairs. and i throttle them back in the winter upstairs.
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Old 05-13-2019, 09:55 AM   #3 (permalink)
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Originally Posted by gunracer1 View Post
i just adjust my vents in the summer wide open upstairs/down stairs. and i throttle them back in the winter upstairs.
This. You could end up in a situation where you cut off too much airflow and cause issues with the unit, but it is unlikely with how leaky most residential systems are. I would try just trimming the vents to make it more comfortable in both zones first.
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Old 05-13-2019, 10:06 AM   #4 (permalink)
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^ I'll give this a try and see what happens. 2 vents down and 2 vents up but certainly worth a shot and much more affordable.
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Old 05-13-2019, 11:04 AM   #5 (permalink)
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Just adjust the vents. Or move the thermostat.
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Old 05-13-2019, 11:43 AM   #6 (permalink)
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Have you check to see if there are existing manual balancing dampers in the ductwork?
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Old 05-13-2019, 11:59 AM   #7 (permalink)
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or

ductless split in master bedroom
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Old 05-13-2019, 12:26 PM   #8 (permalink)
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Have you check to see if there are existing manual balancing dampers in the ductwork?
Also this before adjusting vents. It is not common at all to see balance dampers in residential construction here, but that doesn't mean it isn't common in your area. If there is one, you would probably see a shaft sticking out the side of the duct work with a handle assembly attached. It may also have a remote operator on it if it is inaccessible above a rock lid. Google manual remote damper operator to get an idea of what to look for.
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Old 05-13-2019, 12:50 PM   #9 (permalink)
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Originally Posted by KDXSR5 View Post
Also this before adjusting vents. It is not common at all to see balance dampers in residential construction here, but that doesn't mean it isn't common in your area. If there is one, you would probably see a shaft sticking out the side of the duct work with a handle assembly attached. It may also have a remote operator on it if it is inaccessible above a rock lid. Google manual remote damper operator to get an idea of what to look for.
not much to look for. Just looks like a piece of metal on the side of the ductwork
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Old 05-13-2019, 02:17 PM   #10 (permalink)
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No dampers currently installed. Older home that I moved into in Sept. Previous owners didn't do much correctly.
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