I am looking at the Summers Heat 50-SNC13LC at Lowes. The going price is 599.25 and they 1 available. What do you think? This is going into a 1400sft house with new insulation and low-e windows. We don’t have CH/A(not planning on it either) just space heaters. Located in Oklahoma City and yes we do get some cold spells down here sometimes too.