In order to finalize plans for electrical and plumbing infrastructure at the River House, I had to select a washer and dryer. We will be using a heat pump style ventless dryer. This type of machine runs off a 120V 15amp circuit compared to our last dryer which used 240V 40amp circuit (roughly five times less electricity). More importantly, the unit does not require an outside vent. Conventional dryers exhaust approximately 200 cubic feet of conditioned air every minute. This is a an additional huge waste of energy, especially during the summer and winter months not to mention an additional penetration through the building envelope. In a matter of a few years, I predict that heat pump ventless dryers will be a requirement for all new homes if not all new appliance sales.