These technologies utilize infrared radiation to indirectly heat the air by increasing radiant temperature. The rays heat surfaces such as employees, floors, machinery, materials, and other objects, which then disperse the heat into the environment. The result is a comfortable air temperature and ideal perceived temperature for maximum employee comfort. The units are extremely quiet, with immediate heating power, requiring no fans, thus avoiding dust movement and drafts. Equipped with piezoelectric ignition, no electrical connection is needed. Easily transportable and mobile, fueled by propane-butane or natural gas. Ideal for construction sites or rental equipment companies.