calorized steel

calorized steel

[′kal·ə‚rīzd ‚stēl]
(metallurgy)
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Other features include calorized steel emitter tubes for higher radiant efficiency and safety, a state-of-the-art step opening combustion gas valve for quieter ignition and a closed combustion chamber design and direct spark ignition system with 100% safety shutoff control.
Other features are said to include calorized steel emitter tubes for higher radiant efficiency and safety, a state-of-the-art step opening combustion gas valve for quieter ignition, and a closed combustion chamber design and direct spark ignition system with 100% safety shut-off control.