Calcana’s SR Series infrared heaters are simply the best choice for heating virtually any sized open-space building. Offering unprecedented performance and superior quality, the Calcana gas-fired system uses 30-40% less fuel than forced air heaters. Draft-free and quiet, infrared heaters warm objects, rather than the air. The SR Series is the largest and most powerful line of commercial infrared heaters available. The contractors’ choice for ease of installation, serviceability, and factory support, the SR Series is unmatched in design, performance and quality.