The 80-gallon TD-80 meets the demands of larger homes requiring more hot water at less cost. All connections are top-monte for fast installation and easy servicing of the removable heat exchanger, while the unique High Density Polyethylene plastic liner is impervious to harsh water conditions. The TD-80 minimizes fuel use and provides all the hot water needed for large families. The Top Down™ 80 Boilermate™ also features the industry's most flexible purchasable warranty program for options to fit any budget.