Community Forums

Bug512 · 02-26-2012, 05:18 PM

Quote:

Originally Posted by Gene1

Yes...I have found leaks by using a furnace fan as described.
The fan will give you plenty of interior pressure.( All you need
is 'bubble Soap' of some kind, Dish soap etc.)

Any pictures of the setup you used?

Do you know how many CFM the fan is rated for?

Did you need to tape closed the dash vents and sink drains?

Thanks in advance.

Gene1 · 02-27-2012, 07:59 AM

You're making things way too complicated...Any used squirrel cage
furnace fan from a 60,000 or larger furnace. Output size usually
fits over roof vent hole, doesn't have to be sealed as well as we're
not trying to find leaks in sink drains or dash vents...fan will put out
enough air that what leaks out won't affect trying to find water leaks..
Only reason I said to control interior pressure by 'opening door some'
is an 'out' to those that might be concerned that fan pressure would
be to great. ( I leave doors closed) Also, beware when using soap
on roof...it can become slippery....have a Great Day in The Lord! gh

Gene1 · 02-27-2012, 08:08 AM

Cubic Feet per Minute, (CFM) doesn't have much to do with fan.
The larger fan will pump air in faster, but in the end, after pressure
is built up in RV, fan will then 'stall' , not adding any more air, but
holding what it has already been blown in. The air that 'leaks' out
will be automatically replaced by the 'stalled fan' (meaning, still
running, but just maintaining pressure) gh

Jim Jackson · 02-28-2012, 12:58 PM

I turned on my dash air and my roof fan and sprayed soapy water out of garden sprayer and found bubbles from the tail light and the license plate holder

Gene1 · 02-29-2012, 06:45 AM

Jim Jackson...good idea!..(be sure to have a roof fan that reverses)
This is exactly why we love this site...someone always has a 'better
way', and you just made it simple...thanks to you and all! gh