Here's another bit of a crazy mod that I've done in the past. This was on our 40' / 4-slide rig with 2 dometic 15k units. This improved the air flow, or cfm. The teepee directs air flow directly to the ducts instead of the air turmoil in the distribution area, thus more directed / efficient air flow off of the blower. It kind of deems your quick cool useless, but we were full timing in this one, so we didn't need the quick cool feature. We've also took pipe insulation, or pool noodle type stuff and blocked ducts off at the end of a duct run. Never know if they sealed the end good or not, so we made sure. On our class C, it was obvious the duct run was leaking at the end, so blocking the duct off just after the last register proved to work.
I never understood the circular / race trace dual duct system. It's more of a sales gimmick than an effective system in reality. Either way, the 40' rig would maintain 70 deg in 100 deg direct sun, only AFTER these modifications.
On our present rig, not necessary. The mods we've done so far have helped us maintain 70 in 100 deg direct sun.
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John and Rebecca Dickson
Emma-13 / Little John-10 / Iva-7
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)
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