And around the beginning of the 20 century, there were actually some premital solar water heaters on consumer supermarket, but it didn't sell very well.

The water heater with self-tight sealing under high pressure is a new type of equipment used for waste heat recovery from the synthesis system in the small nitrogenous fertilizer plants.

Our most popular model incorporates the same basic unit as the basic water heater, plus pumping stations for recirculating hot water to the customer's holding tank.