I don't get much air pressure on our 2nd floor, so it seems the cold
air stays around the floor area.
I was wondering if anyone had any suggestions.
I hear they make inline duct fans and vent covers that have fans
built-in. I wonder how hard it is to get power to an inline duct fan?
The best way to adjust the air flow would be to install dampers. If the duct
system has a separate trunk line for the 1st and 2nd floor install dampers
as close to the furnace as possible and adjust the flow as required for
heating and cooling. If the distribution system doesn't lend itself to
proper damper placement try running the fan 24/7 to get some help with your
common problem. Constant fan operation in some cases helps in other it makes
little difference, you are the judge. Duct boosters will not likely give
Thank you for the advice. However, I don't have separate trunk lines,
unfortunately. The installer said something about a "zone" system;
which I assume would be like a system of dampers that would shut off
air at the closest possible point to the trunk. I've closed all the
vent covers in the basement and first floor, and still is pretty hot.
I will try a fan.
I'm curious if anyone's had any luck with "zone" system or inline duct
fans of some kind.
Shut off too much and it will really end up hot. The A/C requires a
minimal amount of air flow or it can freeze up.
I would be interested in what the installer said about zones.
BTW what speed is the fan on when the A/C is operating?
A zoned system is just a motorized damper system with a thermostat to open
and close dampers. Zone systems start with a properly designed duct system
that are designed for zone use. If a installer suggested zoning you should
in fact have separate trunks feeding the different levels of your home. Few
design plans would not have such a division although it could. Get a second
option to be sure. A well designed zoned add on will include a bypass,
dampers, thermostats and cost several thousands of dollars. Some systems I
have seen did not use a bypass and led to systems failures.
Closing vents has done little good in most systems I've seen and can lead to
frozen evaporator coils in some cases when the outdoor temperature is
Sinic is correct. Making the best use of what you have is where you
should start. If that can't be done, you would likely be better served by
having a good professional come out and see that is wrong with the air
handling system. It could have been designed for heat only, undersized for
A/C, partly blocked, etc. Only after finding out what the problem can you
fix the problem.
As for your question, try a vent cover fan. You will waste a lot less
effort and money on it before you move on and find out what the real problem
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