Low Profile Makes Problem Installations Easy The Sentry Boiler fits into replacement sites with low chimney breeching or low overhead clearance. Sentry models have an integral draft diverter and do not require a seperate draft hood. Chimney vent connections heights begin at 38-1/2", nearly a foot and a half lower than typical natural draft boilers. Sentry's low profile permits installation in sites with low chimney breeching or low overhead clearance.
Advanced Natural Draft Design Promises Efficiency & Reliability An advanced design heat exchanger permits Sentry to operate with high efficiency using simple, dependable natural draft technology. Sentry operates with efficiencies up to 84.4% AFUE. The flue passage design, thermal pin pattern and consistent wall thickness of Sentry's cast-iron heat exchanger sections ensure uniform heat transfer with less thermal strain and metal fatigue. Slant/Fin uses only reliable metal push nipple to connect individual sections. All models included a reliable, heavy duty motorized vent damper to maximize efficiency.