By electric heat I am guessing you may have AC units with heat pumps, this is listed as an option on their website so you would have had to order or buy a coach with this option.
Check your thermostat and see if it gives you an option to use the AC's as heat pumps.
If you have the dealer sheet it should specify that the AC's have the option. It is listed on their website as
Heating and Cooling
15,000 A/C w/ Heat Pump IPO 13,500 in LR