HH-RR-503 is specially designed for gas water heater production lines. It supports full performance testing of water heaters in the power range of 0-30kW, integrating 20+ core indicator tests such as thermal efficiency (accuracy ±1%), air tightness (leakage ≤0.05L/h), safety protection (flameout response ≤60s), etc. It is equipped with a PLC touch system and a high-precision sensor matrix, complies with GB 6932 and IEC 60335 international standards, and automatically generates energy efficiency curves and fault analysis reports. It is the preferred testing equipment for water heater manufacturers, quality inspection agencies and certification laboratories.