Prices are checked against each store and labelled with when.
It checks today's price at every store, compares the alternatives and answers in about a minute.
The ThermoMate CZ750NG is an indoor, wall-mounted natural gas tankless water heater rated at 199,000 BTU. It delivers up to 8 GPM at a 33°F rise, enough for roughly 3–5 fixtures at once, and uses an oxygen-free copper heat exchanger with up to 98% thermal efficiency and a UEF of 0.81. It suits larger households replacing a tank, but its 8 GPM figure drops sharply in cold weather, so cold-climate homes should size it by ground water temperature. Against condensing rivals it is a non-condensing copper unit, which keeps it simpler but less efficient than fully condensing models.
In stockReturn policy
The ThermoMate CZ750NG is a natural gas tankless water heater for indoor, whole-house use. It heats water on demand, so there is no storage tank. It has a maximum heating capacity of 199,000 BTU and a flow rate of up to 8 GPM at a 33°F temperature rise. Under suitable operating conditions, it can supply 3 to 5 fixtures at once.
The heat exchanger is made of oxygen-free copper. Thermal efficiency is up to 98%, and the Uniform Energy Factor (UEF) is 0.81. Water flow and temperature sensors adjust gas input and heating output automatically. The multi-stage combustion system keeps water temperature within ±1°F.
The unit has eight safety protections: flame failure, overheating, over-temperature, freeze, dry-burn, blockage, high-temperature lockout and excessive air pressure. Freeze protection activates at about 41°F (5°C). The heater mounts on a wall. Professional installation according to local codes and the product manual is required.
