I have to agree with PolarisGuy, the furnace on the 2016 (cant vouch for any other years, I dont have one) WA2916 is great. It only has to run for a short period of time the trailer is toasty. It is far more effective as a furnace at heating the coach when its cold out than the A/C is (mine is 13.5k BTU) at cooling it when it's hot out. But the A/C seems Ok too.
TH : 2016 Stealth WA2916
TV : 2012 Ford F-250 PSD