Combustion heaters directly (without airlock) and then the combustion gases are mixed with the air output and therefore suitable for those environments open or semi open.
Hot-air applications
Heaters sealed combustion chamber, where combustion gases are expelled through the proper chimney and so are those suitable for indoors.
Hot Air Generator Certifications
All generators must be built and marketed with the CE mark and a protection to IP44
Drill Bits.
