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The SHZOND 18L is a tankless natural gas water heater rated at 36 kW and about 4.8 GPM, meant to deliver hot water on demand without a storage tank. It runs on natural gas only and needs ventilation and a flue, so it is a job for a licensed installer rather than a plug-in appliance. Its appeal is endless hot water and a small wall footprint for a house or off-grid setup where electricity is limited. Against mainstream tankless brands it is a basic unit with fewer controls and no listed freeze protection or digital setpoint, and owners report a mixed record on reliability.
In stockSold by MstgeReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Ratings are decent overall, and buyers like the instant, endless hot water and the small wall-mounted size. Complaints center on installation demands and units that underperform or fail, which drags the average down.
This is a tankless natural gas water heater that heats water on demand. It delivers 18 L/min (4.8 GPM) of hot water and takes up less space than a tank heater. It runs on natural gas only, so it also suits off-grid areas or places where electricity is not readily available.
The heat source is kept separate from the bathing area. The unit is installed in the kitchen or another ventilated space, not in the shower room. It uses electric pulse automatic ignition powered by 2 D batteries (not included). It exhausts through an open, forced flue.
It is best installed by a professional and must be used with good ventilation and a working flue kit. Check the gas connection regularly for leaks. A shower kit is included.



