Warm Air & Radiant Heaters - Multi & Continuous Radiant Tube

Overhead gas and oil fired radiant heaters that have individual or combined flues must have net thermal efficiencies above the following thresholds:

82% for radiant heaters with individual flues on each burner.
90% for multi-burner or continuous radiant heating systems.

The test methodology defined in EN1020 for air heaters with fan assisted combustion should be used to prove the thermal efficiency of multi-burner and continuous radiant tube heaters.