8.0 GPM Residential Natural Gas Tankless Water Heater

Enjoy continuous, on-demand hot water with the ThermoMate CZ750NG Natural Gas Tankless Water Heater. Designed for indoor whole-house applications, this powerful 199,000 BTU gas water heater delivers up to 8 GPM, providing reliable hot water for multiple bathrooms, kitchens, and laundry areas. Featuring precise temperature control, an efficient copper heat exchanger, and a compact wall-mounted design, the CZ750NG offers a convenient hot water solution for modern homes. Powerful 199,000 BTU Heating for Whole House Use With a maximum heating capacity of 199,000 BTU and a hot water flow rate of up to 8 GPM at a 33°F temperature rise, this natural gas tankless water heater can support 3–5 fixtures simultaneously under suitable operating conditions. Whether you're taking a shower, washing dishes, or doing laundry, enjoy a continuous supply of hot water without the limitations of a traditional storage tank. Energy-Efficient On-Demand Water Heating Built with a high-quality oxygen-free copper heat exchanger, the CZ750NG provides efficient heat transfer and reliable long-term performance. With a thermal efficiency rating of up to 98% and a Uniform Energy Factor (UEF) of 0.81, its on-demand heating system heats water only when needed, helping reduce standby energy waste compared with conventional tank-style water heaters. Precise Temperature Control Within ±1°F Advanced water flow and temperature sensors continuously monitor operating conditions and automatically adjust gas input and heating output. The intelligent multi-stage combustion system helps maintain water temperature stability within ±1°F, providing consistent comfort even when water demand or incoming water temperatures fluctuate. Advanced Safety Features & Freeze Protection Designed for safe and dependable indoor operation, this gas tankless water heater incorporates eight safety protections, including flame failure, overheating, over-temperature, freeze, dry-burn, blockage, high-temperature lockout, and excessive air pressure protection. The built-in freeze protection system activates at approximately 41°F (5°C) to help protect internal components during cold weather when operating conditions allow. Compact Wall-Mounted Design for Easy Installation Measuring just 21"H × 13"W × 7"D, the CZ750NG saves valuable floor space and fits conveniently in utility rooms and other suitable indoor installation locations. Standard 3/4" NPT hot and cold water connections, a 3/4" NPT natural gas inlet, a 3" OD vent connection, and a 120V power plug provide practical installation compatibility. Professional installation according to local codes and the product manual is required.