Rinnai has over 30 million tankless water heater installations worldwide. They have been efficiently heating water since 1964, and selling their heating appliances in the United States since 1974. Rinnai is the world's largest gas appliance manufacturer.

Rinnai designs, engineers, and builds their products and components in-house. Their segment leading appliances reflect over 45 years of innovation and improvements. Rinnai's experience developing and manufacturing tankless water heaters is as comforting as the endless hot water supply.

Rinnai tankless water heaters are the #1 brand in the United States and have industry leading reliability and efficiency. A Rinnai tankless water heater will offer years of reliable service, while offering high efficiency and output.  They can easily create enough continuous hot water for up to 4 fixtures in a home at one time.

Greenspring Energy has installed hundreds of Rinnai tankless water heaters and is an authorized dealer and service technician.