Terrydactile
Bessemer, Alabama
Senior Member
Joined: 08/08/2008
View Profile
Good Sam RV Club
 Offline
|
While servicing my A/C today I found out something very interesting. I had removed the inside trim piece and was looking up inside at the fins to see if they needed to be brushed clean. They were super clean. Upon further looking around in there I found were the insulation board connects to the output side of the A/C to form the duct work going to the registers in the ceiling. Well, the problem is that the tape that Keystone used to seal that duct to the A/C unit either was loose or non-existent. You could see that since these are not sealed well that cool air would just be blowing into the space between the ceiling board and the roof. (attic if you will)
My A/C has always done a super job even in 100 degree high humidity situations but after I reseal that duct work to the A/C I know it will do a lot better or run less often. At any rate it will be fixed and sealed like it should be.
Now I'm wondering if the joints I can't see in the ceiling are taped correctly. Maybe someday when I gotta take down the ceiling for some reason I'll see.
You guys might want to have a look at yours. Just a suggestion.
Scott & Theresa Boyd
2 Daughters (Cassie & Brittany)
1 Furkid (Ella, a Basset Golden mix)
'08 Keystone Passport 280BH
|
Pond Jumper
North Texas
Senior Member
Joined: 01/19/2008
View Profile
Offline
|
Most of these things a just thrown together. They actually think that have quality products. I just worked on my Atwood oven/stove. What a peace of junk. The list is long.
Thanks for the info
PJ
|
smkettner
Southern California
Senior Member
Joined: 03/21/2005
View Profile
Good Sam RV Club
|
Yes I suspect the same issue on mine. I had an electric plate off one summer day and a good amount of cool air was blowing in from inside the wall  My 13.5 air struggles to keep us cool at any outside temp of 90 degrees or more.
And it is in the floor also. I was reviewing the floor furnace ducting due to the way the furnace was cycling. I found that the cross feed from the furnace was collapsed and nearly closed off due to excess insulation or other materials when the floor was assembled. They must have just slapped the board down and basically crushed the ducting. So instead of 12" x 2" duct (24 sq inches) I had only two 2" triangles at each side of the duct (4 sq inches) that were open. I jammed some 1.5" aluminum stock into the duct to prop it open. So now I have 18 square inches for the hot air to circulate. Much better. 
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
|
lanerd
Ridgecrest, CA
Senior Member
Joined: 03/03/2003
View Profile
Good Sam RV Club
Offline
|
Thanks for the heads up. I will definitely check mine.
Ron
Ron & Sandie
'08 Safari Simba SBD35
Toad: Restored 86 Toy 4x4 P/U
Tow Bar: Sterling
Brakes: Unified
TPMS: Pressure Pro
RETIRED!! How sweet it is....
|
btd35
Spokane, WA
Senior Member
Joined: 03/24/2005
View Profile
Offline
|
I just added the inspection of the duct to my things to do list. Thanks a bunch.
Tom & Beth
05,Grand Junction 35TMS
99, Dodge 3500 Dually.
|
|
|
Briteskys
Mesa, AZ
Senior Member
Joined: 09/21/2006
View Profile
|
Quote:Well, the problem is that the tape that Keystone used to seal that duct to the A/C unit either was loose or non-existent. Not all duct tape is created equal. Never buy that cheap stuff at home depot or hardware stores for sealing HVAC joints.
Nashua is the brand you want and # 357 is the highest grade tape for AC work.
'02 Beaver Patriot Thunder
Jeep Grand Cherokee
Ron & Jane's Travels
|
Dave H M
IL
Senior Member
Joined: 08/11/2006
View Profile
Offline
|
Yep, My Keystone Laredo was the same way.
|
Terrydactile
Bessemer, Alabama
Senior Member
Joined: 08/08/2008
View Profile
Good Sam RV Club
Offline
|
Briteskys wrote:Quote:Well, the problem is that the tape that Keystone used to seal that duct to the A/C unit either was loose or non-existent. Not all duct tape is created equal. Never buy that cheap stuff at home depot or hardware stores for sealing HVAC joints.
Nashua is the brand you want and # 357 is the highest grade tape for AC work.
Just so happens that Nashua is the brand I have left over from another job.
Upon further examination the aluminum tape they used just lost its stickiness. Just like CHEAP tape does.
I can't wait to see how much more air I get out of the vents when Im done. Some of the gaps in that duct are 1/2".
|
ol Bombero-JC
USA
Senior Member
Joined: 06/24/2004
View Profile
|
Briteskys wrote:Quote:Well, the problem is that the tape that Keystone used to seal that duct to the A/C unit either was loose or non-existent. Not all duct tape is created equal. Never buy that cheap stuff at home depot or hardware stores for sealing HVAC joints.
Nashua is the brand you want and # 357 is the highest grade tape for AC work.
OK - good (but incomplete) advice - I always looked at mil thickness.
So, I won't buy the cheap stuff at Home Depot or Hardware stores!
But - Where do I (we) get Nashua #357 ? Is it also avail at the above?
Thanx.
~
|
Briteskys
Mesa, AZ
Senior Member
Joined: 09/21/2006
View Profile
|
ol Bombero-JC wrote:Briteskys wrote:Quote:Well, the problem is that the tape that Keystone used to seal that duct to the A/C unit either was loose or non-existent. Not all duct tape is created equal. Never buy that cheap stuff at home depot or hardware stores for sealing HVAC joints.
Nashua is the brand you want and # 357 is the highest grade tape for AC work.
OK - good (but incomplete) advice - I always looked at mil thickness.
So, I won't buy the cheap stuff at Home Depot or Hardware stores!
But - Where do I (we) get Nashua #357 ? Is it also avail at the above?
Thanx.
~ More info about Nashua # 357
|
|
|
