2 uth's ambient temp low

[mrodgers73]

Ok I have a 30 gallon glass aquarium with 2 uth's 1 on hot side and 1 on cold. Hot side temp 90-92 cold side temp 80-82. House temp around 74 constant temp. I have 1 inch of cypess mulch for substrate humidy averages around 60-65 percent ambient temp stays around 74. Tank is covered on 3 sides with 1/4 styrofoam and 95% of screen top is also covered with styrofoam covered with foil. Unable to get ambent temp up. Any help or suggestions would be appreciated.

how is your cold side temp 80 but ambient 74?

Cold side temp is 80-82 ambient temp is 74