Thanks to member LandYacht ive learned that modern computer fans are super efficient and quite powerful for their size. My toyhauler AC is ducted. You have the choice whether to open or close the main vent. With the main vent open its really loud inside, but i got to think running through ducts reduces it efficiency. What about attaching a computer fan to the outside of the vent? Or maybe even pull cover and attach the fan inside the AC unit at the start of the duct. Because again thanks to landyacht it seems the fans do a better job at pushing through a restriction. Could even get a small 12v converter and wire to the 110v feed of the ac unit. Or even better find the wire or terminal that gets energized when the AC unit turns on. So the fan would turn on automatically. Any thoughts?

I have several vents. What do you mean 'main vent'?

2oldman wrote:I have several vents. What do you mean 'main vent'?The ducted systems have a grill like this.The lever can be slid to one side to let all the cool air dump directly down from the A/C. Slide the lever to the other side and it becomes ducted.

wopachop wrote:Thanks to member LandYacht ive learned that modern computer fans are super efficient and quite powerful for their size. My toyhauler AC is ducted. You have the choice whether to open or close the main vent. With the main vent open its really loud inside, but i got to think running through ducts reduces it efficiency. What about attaching a computer fan to the outside of the vent? Or maybe even pull cover and attach the fan inside the AC unit at the start of the duct. Because again thanks to landyacht it seems the fans do a better job at pushing through a restriction. Could even get a small 12v converter and wire to the 110v feed of the ac unit. Or even better find the wire or terminal that gets energized when the AC unit turns on. So the fan would turn on automatically. Any thoughts?Do your ducted vents have dampers that can be closed? I swapped all my vents to ones with dampers. Close the ones you don't need open and it'll redirect more air to the ones you need.

Check your ductwork as best you can to see if everything is clear and open. If you do use fans, remember that cold air is harder to push then warm air, so get the larger fans. Muffin fans come in both 110 and 12 volt versions.

First thing I’d do is make sure you’re not losing air at the source. In my last mh a good bit of cold air was going back up the return as the divider between the two sides was poorly done.

Computer Fans on AC Ducts? | Good Sam Community

14 Replies

TakingThe5th
Explorer
Jun 13, 2018
Check your ductwork as best you can to see if everything is clear and open. If you do use fans, remember that cold air is harder to push then warm air, so get the larger fans. Muffin fans come in both 110 and 12 volt versions.
sgip2000
Explorer
Jun 13, 2018
wopachop wrote:
Thanks to member LandYacht ive learned that modern computer fans are super efficient and quite powerful for their size.

My toyhauler AC is ducted. You have the choice whether to open or close the main vent. With the main vent open its really loud inside, but i got to think running through ducts reduces it efficiency.

What about attaching a computer fan to the outside of the vent? Or maybe even pull cover and attach the fan inside the AC unit at the start of the duct. Because again thanks to landyacht it seems the fans do a better job at pushing through a restriction. Could even get a small 12v converter and wire to the 110v feed of the ac unit. Or even better find the wire or terminal that gets energized when the AC unit turns on. So the fan would turn on automatically.

Any thoughts?

Do your ducted vents have dampers that can be closed? I swapped all my vents to ones with dampers. Close the ones you don't need open and it'll redirect more air to the ones you need.
sgip2000
Explorer
Jun 13, 2018
2oldman wrote:
I have several vents. What do you mean 'main vent'?

The ducted systems have a grill like this.

The lever can be slid to one side to let all the cool air dump directly down from the A/C. Slide the lever to the other side and it becomes ducted.
2oldman
Explorer II
Jun 13, 2018
I have several vents. What do you mean 'main vent'?

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Computer Fans on AC Ducts?

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