torch

A coal burner is a device that is used to burn coal to produce heat or steam in various industrial and domestic uses.

Spiral source

The spiral coil spring is one of the types of heat exchangers for hot water production, where the coil is placed in a spiral inside a tank.

heat exchanger

**Shell & Tube** heat exchanger is one of the most widely used types of industrial heat exchangers that are used in various industries to transfer heat between two fluids.

Boiler

A hot water heater is a device that heats water to a high temperature (usually between 60 and 180 degrees Celsius) without reaching the boiling point.