Thank you for the information. I think I will looking at a Webasto heating system. Same as the Eberspacher, but better represented down here in Aus. I don’t think I can fit the unit under the aft bunk as I already have a fuel tank and FW tank under there and don’t there is much room left. However there is a space in ER just forward of where my genset is placed, which might lend itself to suitable position. It’s a project for research over summer and fitting next winter – that is if summer ever arrives. The weather has beed dreadful this past couple of months – more like the UK – lol.