Without the right insulation R-values, hot and cold air alike can flow right through a home’s flooring, walls, ceilings, and attic. But what exactly is R-value, and what does it have to do with ...

Just look for an efficient tub with good insulation, a sturdy cover and a dual-pump system. When shopping around for an efficient hot tub, look for a well-insulated model with a high R-value.