Question for anyone out there who has a Wallas 1300 type heater. Are ther any problems with fumes at all from the unit? Startup fumes? What about exhaust fumes while fishing on deck? I really want to upgrade to one of these as the Mr Heater does not quite cut it. Roof vent or side of hardtop for venting? My wife is real sensitive to fumes from kero or diesel and I do not want to invest in something I can not use.