equity win tie pots won pots tied
Hand 0: 39.141% 39.12% 00.02% 6972 3.00 { Th8h }
Hand 1: 60.859% 60.84% 00.02% 10842 3.00 { KK+, 88, AKs, QhJh, 7h6h, AKo }

This is a range for him getting it in on the flop. Meh. Given what's in the pot here he doesn't have to have air and be folding hardly ever to make it +EV. Think I'd have to c/f non heart turns if I flat, but since we can stack this range on heart turns our implied odds are good so this could be a call on the flop.