Devices for heating and vapor producing installations, namely, asphalt heaters for use with asphalt plants and aggregate plants, gas heating stoves, boilers for central heating and natural gas installations, gas boilers, gas burners, electric heaters, electric heaters for baths, electric radiators, heat pumps, electric water boilers, solar collector devices, namely, solar water heaters, heating apparatus for solid, liquid or gaseous fuels, namely, hot-water space heating apparatus, gas cooker...