TKI1022 Features: * Tankless water heater * Can provide at least three showers worth of water simultaneously * BTU natural gas input: 13,000 (minimum) * Gas connection 3/4" NPT * LP gas pressure inlet minimum 8.0" WC * Water pressure minimum 15psi * T-H2-OS Manifold pressure natural: 2.7" WC * Condensate water drain 1/2" NPT * Propane gas: 4.6" WC * Weight DV: 73lbs * Flow rate: 4.6 Gpm or 276 Gph * Unit will provide 6.1 Gpm Or 366Gph * Energy star Construction: * PVC construction Specifications: * Average efficiency of 92pct with natural gas and 95pct with propane Dimensions: * Overall dimensions: 19" H x 24" W x 31" D