As far as I know they are true heat pumps. I ordered them with mine and that is what I got. We are camped at 8K feet right now with a temp of 46 degrees and they are working great. Mine are a Coleman product.
JimT
2020 Jayco Pinnacle 32RLTS, 2020 Ford F350, Platinum, 6.7 diesel, 4X4, CCLB, SRW, 12,400 GVWR