A: Owing to the presence of hazardous vapors and gases, a poorly designed or inadequately maintained combustion system can lead to explosions, fires, asphyxia and burns. For that reason, Rockford Combustion Solutions features industrial-grade components which are ventless, wired to universally accept 50 or 60Hz control systems, and accommodate operating fuel and ambient temperatures anywhere from 14°F to 140°F. Optional features such as safety valve proving, climatizing to -20°F, 230V controls, lockable valves, pilot-line assemblies and flexible compensators are also available.