We pride ourselves with being “the first” in many areas including the following: We are the First tankless water heater company specializing in tankless-only products to enter the North American market. We are also the first tankless water heater company to offer a tankless product (the T-H1) with an amazing thermal efficiency rating of up to 95%. Takagi is the First tankless water heater company to offer a "direct vent convertible" tankless model (the T-K3) which allows you to convert the unit to a direct vent unit and Takagi is the First tankless water heater company to utilize the air-fuel ratio rod, a unique safety device.