A/c
Hey guys. Bighorn owner here if I may jump in because I dealt with the airflow problem on mine. Here is what worked for me. If you read on dometics website, they tell you a 15k BTU unit requires a minimum of 8 vents. Mine only had 6 so I added 3 more. I did the "vent tent". I also noticed that the trunk lines of the system ran way past the last vent openings. I blocked off at the last vent on both sides front an rear with sheet metal. They tell you not to do this, but with the added vents and blocking the trunk lines off, my airflow was double. I also re-taped everything. I had a lot of cracks and was cooling the roof in a lot of places. This fixed my problem unless it got into the 90's. I eventually added a second A/C unit and that was the best money I spent. Just my 2 cents.