Ive been dealing with temp problems on my lower enclosure for a year now when the AC is on or the house cools at night during winter. Ive tried everything as most of you know from foam insulation board, sheet metal ect to help hold the heat in..
What I have learned. If your home is under 68 degrees and your enclosure is above 15"H ( T11/T12/T20 etc.. Mine are 24" H) then the recommended RHP's for a 4' enclose wont keep your hot spot 91 or your cool side 78-81. Ive tested this for months now changing everything around and the only thing that has solved it is the next size up RHP unless I put a blanket over the front Sliders. The reason I say this only pertains to over 15" hight enclosures is because people that have the T8 and T10 aren't having this issue at all I'm told. The 4 Sq Ft extra in hight makes a big difference in a room where AC is set to 65 degrees or winter night time temps drop to 60-62 which isn't unheard of in the states were we turn our heat down at night. I don't know about you but i cant sleep with 68-70 degree heat blowing on me at night and need AC 24/7 during summer.
Bob at pro products once again took care of what I needed. He didn't charge me any shipping for the replacement 110 watt panel and refunded the full amount of my previous 88 watt RHP when he received it. Cant beat that.
Anyway this now brings temps up to what I need when its cold (let the house drop to 60 to test it) and when the house warms to 70 during the day the RHP is running a lot less where the other one ran at 90/100% when it was 68-70 and then lost 5 -7 degrees when the house dropped to 60 at night.
Hopefully those people ordering larger enclosures will see this thread in the future to save them the hassle.
Ive talked to 2 different manufacturers of RHP's and they both were off on the size panel I needed for a 60-65 degree house.