Hi all just an update, thought I would mention we tested the roof top air unit on the weekend on heat setting (no cold).
Few points,
1) It's noisy on any setting above 2, very noisy to the point where its uncomfortable. It's not that it vibrates just the fans are very powerfull which in turn makes it more noisy as it moves alot of air. This would be good when its hot as it will cool down quickly but for heating at night it can be a bit over the top.
2) Not sure how the heating works on it but it seems the heating function it sucks cold air in, heats it up and spews it back out. Not sure on how a heron works but when I put my hand in front of the air vents on the Dometic B2200 unit the air temp was warmish but on the Heron Q 2.2 it was hot. The van did heat up over a period of time but took a little while. Still worked a treat but you had to jam the fan up high to get it to go quickly so it was a tad annoying.
I am going to give Dometic / the dealer a buzz this morning and question the heating ability on the unit. Again have not tried cooling but this is my finding on the heating bit.
I still prefer the unit to the heron though!
