Clean, Safe Heating

The Master BV 691 FS delivers 100% clean warm air, making it safe for enclosed spaces where ventilation is limited. All combustion by-products are vented outside via a flue, ensuring fume-free operation.

High Power Performance

With an impressive 225kW heat output and 12,800m³/h airflow, this heater is built for industrial-scale applications. It can push warm air over long distances, heating large sites quickly and effectively.

Flexible Air Distribution

The outlet can connect to 1, 2, or 4 ducts, allowing heat to be directed into multiple areas simultaneously. This makes the BV 691 FS highly efficient for large buildings, events, and construction projects.

Built Tough for Industry

Designed with a strong steel frame, stainless steel panels, and high-quality Riello burner, this heater is made for demanding environments. Large wheels and crane hooks provide easy mobility across sites.

Easy to Use

Digital combustion controls, a clear display, and a unique cold-start button ensure quick and reliable operation. The Summer-Winter switch allows the fan to circulate fresh air when heating isn’t required.

Efficient & Cost-Effective

With its external fuel tank connector and thermostat compatibility, the BV 691 FS runs efficiently while reducing fuel consumption. This adds both convenience and long-term cost savings.