No. Your tanks will not be heated. If they were there would be tank heater switch(s). Your unit will have an actively heated underbelly but the valves and tanks will be unheated. This will be sufficient for reasonable temps though. Just use your furnace from time to time. When I had my 295RST-TE back to the factory I had tank heaters installed because we winter camp. Last winter we were fine on the tanks but the valves did freeze once in a while.
2015 F-350 SRW 6.7 PSD
2014 Crusader 295RST
1 Fantastic DW
1 Amazing DD
1 Beagle that will be missed (RIP Zeus)