Description of Pentair Minimax 75-100 Natural Gas Indoor Spa Heaters: 75,000 to 100,000 BTUs and up to 3,500 feet elevation.

The MiniMax® 75 and 100 spa heaters are compact, lightweight and efficient gas fired high-performance aboveground pool and spa heaters. They can be connected to schedule 40 CPVC or ABS pipe and have a built-in top. Reliable direct-spark ignition (DSI) system is available in propane or natural gas versions. Recommended for heating aboveground pools and spas up to 900 gallons capacity.

Features:

Millivolt standing pilot versions in propane or natural gas.
Quiet and dependable operation from packaged burner system.
The controls have been designed for very easy access and are user friendly.
Bronze Headers and Quick Flange allow 1-1/2 inch FIP connect.
Installs to 3,500 feet altitude.

Choose from electronic or millivolt models. The models listed below are natural gas indoor heaters (the heater is located inside).

The MiniMax 75 Natural Gas heater is specifically engineered to produce lower amounts of nitrogen oxide (NOx) emissions and comply with regulatory requirements in force at the regional and state levels in the U.S.