Should be fine. Too many people have done the fireplace (permanent install) with great success, plus it's standard on other rigs. No difference. It's a little electric heater.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)