What is the best supplemental heating system to pair with a LP 90 + forced air furnace in N. Indiana?

Question

My home has 2800 SQ feet well insulated and built in 2001.

Answer 1

my brother had a long apartment and the heat was not reaching in the front living area. So he had a gas fireplace installed and this did wonders in keeping the whole long apartment nice and warm. He chose to get one that looks like a pot belly stove but you can get the traditional kind. they look very nice too.