Bradford White Corp. has introduced its Residential Gas--High Input Direct Vent water heater. Available in 50-, 65- and 75-gal. capacities, this new water heater boasts an excellent recovery rate, a high First Hour Delivery rate and is ideal for installations with an insufficient supply of combustion air. Utilizing a telescopic, coaxial (pipe inside a pipe) venting system with a heavy-duty aluminum inner wall and a galvanized outer wall, the air for combustion is introduced through the outer pipe and the products of combustion are exhausted through the inner pipe. Bradford White Corp.