A friend has a large pole building for car repair. He has a waste oil burner for heat. A year ago I put in a 3 ton 18 seer heat pump in his shop. In the summer he keeps it at a reasonable temp and moderates the humidity inside. In the winter he keeps the temp in the low 60's and fires up the burner when he is working in there. This goes a long way to prevent rust from forming from moisture condensing on metal items. Great combo plus it makes distilled water for batteries !
paul
paul