BHOK A/C ducting

[Pitbull62]

Hello all. I’m new here. Sounds like the perfect place for gaining Jayco knowledge. So I have a question. Took my 29.5 bhok out to the desert here in California. It was rather hot. 88-90 degrees. I realize at this point it may be pointless to turn on the ac by using my 3060 watt champion generator. Obviously I can only run 1 of my 2, 15k units. Activating the living area ac dropped the temps only by about 2-3 degrees over the course of about 3.5-4.0 hours. I will try tomorow to start 1 ac unit early in the morning and see how it does. The living area has 4 vents. Only the 2 vents closest to the rear bunks had good airflow. The 2 vents closest to the master were hardly and I mean barely blowing at all. The airflow to the bunks and the master also had good airflow. The 2 vents closest to the master only increased airflow when I had both units running at the same time via my home 50amp source. I’m hoping someone can shed some light on this before taking it in for service on that. Without proper airflow to the 4 living area vents with one unit on, my RV life is going to suck.

[JFlightRisk]

Welcome to the Forum from Western New York State!

There may be an obstruction in the ceiling ducting, perhaps a partial collapse. I found that some of the ceiling outlets had a collar that protruded too far up unto the ducting. Some I had to remove, and some I just cut down. The third thing that a lot of members have done, including myself, is sealing ant gap between the outlets and the upper ducting. Take the outlets off the ceiling, and see if there's a gap where the A/C is blowing into the "attic" area, between the ceiling panel, and the upper duct. You can seal that area with actual aluminum duct tape (not the common cloth type), and then replace the outlet in the ceiling.

Here's pictures of what I'm describing.https://www.jaycoowners.com/forums/f...air-70798.html

[Pitbull62]

Thanks for the response. I will have to take a look tomorow.

[Pitbull62]

Originally Posted by JFlightRisk

Welcome to the Forum from Western New York State!

There may be an obstruction in the ceiling ducting, perhaps a partial collapse. I found that some of the ceiling outlets had a collar that protruded too far up unto the ducting. Some I had to remove, and some I just cut down. The third thing that a lot of members have done, including myself, is sealing ant gap between the outlets and the upper ducting. Take the outlets off the ceiling, and see if there's a gap where the A/C is blowing into the "attic" area, between the ceiling panel, and the upper duct. You can seal that area with actual aluminum duct tape (not the common cloth type), and then replace the outlet in the ceiling.

Here's pictures of what I'm describing.https://www.jaycoowners.com/forums/f...air-70798.html

Thanks for the link. I Removed both of the weak vents. One of them has from 1/4 inch to probably close to 3/8 of an inch of a gap around half the diameter of the opening. So I have a question if I were to do what the link says and put the aluminum foil tape and it is still not successful and I take the RV to the dealer will they say something?

[Pitbull62]

So the dealer has had my RV since 6/25. Today is 8/12. They are telling me the AC units are performing as designed. Also they claim there is another similar unit on the lot and when they checked it’s airflow it was the same as mine. It appears this is the end of the line with what they’re willing to give up voluntarily which i will have to escalate. I’m going in tomorow so they can show me how the other similar RV blows the same as mine. The service manager told me the ac units themselves will blow out 15-20 degrees cooler than ambient BUT no guarantees on how low the coach will get. Does this sound right? I always hear that the coach itself gets down 15-20 degrees. Any help would be appreciated because all I can think of from here is to get a lawyer. The salesperson was made aware when I purchased the RV of where I frequent in my RV and we all know 50 amp hookups aren’t found everywhere. My point here is one ac unit should do a decent job at cooling the living room area and not just drop the coach temp by 2 degrees when it’s 90 degrees out.

[Grumpy]

Originally Posted by Pitbull62

The service manager told me the ac units themselves will blow out 15-20 degrees cooler than ambient BUT no guarantees on how low the coach will get. Does this sound right? I always hear that the coach itself gets down 15-20 degrees.

That is the industry standard. A 15-20 degree temp drop across the coil not inside the coach as compared to outside.

[mokurt]

My BIL is an HVAC contractor and installed a new system in our house 7 years ago.
I know he checks the registers with a infrared thermometer.Might be a good idea to check yours and the other one so you can compare the output.

As far as taping I had to retape the heat registers in our trailer because of open gaps.Also there was a lot of mfg. debris in the registers and ducting.
Would not be surprised if your a/c ducting has debris or obstructions.