Compact hydronic unit heater with a two-row heat exchanger with a power of 10-68 mbh and an air flow rate of up to 1236 cfm. Suitable for 240v/1p/60hz power supply. The casing made of abs material is characterized by high mechanical strength, resistance to high temperature and unchanging aesthetics. The materials used in the production of the device’s casing allowed to achieve aesthetic and utility values unattainable for products offered in the low-cost epp technology or unaesthetic steel casings