Product Description TK-JR-N Takagi Jr. Flash Tankless Water Heater - NATURAL GAS At just twenty inches high, and weighing only fourty pounds, the T-K Jr. is the most compact unit in the Takagi line. Designed to produce endless hot water and radiant heating for smaller homes, The T-K Jr. uses the same innovative technology as the original Takagi units - only on an even smaller scale. This model uses Natural Gas. It is also available in LPG (Liquid Propane Gas), lead time may vary. Accessories included: Wall-mounting bracket Watts 3L150 - Pressure Relief Valve> Takagi TK Jr Technical Specificatons