Yes, the water is "HOT". I was told there is no adjustment. I see you are in 90 degree temps. so, my comments about the furnace in the 8528IKWS probably don't mean much to you but, we have found that the furnace does not put adequate heat in the living room and too much heat in the bedroom/bathroom.
2015 Flagstaff 8528IKWS Diamond Package
2013 Ford F-150 Super Crew, EcoBoost, Max Tow,
6.5 bed, Roadmaster Active Suspension, E rated tires
91 days camped 2015
15 days camped 2016 more planned