Oil-free design is more environmentally friendly and energy efficient than competitors' oil-filled units.Taylor's Oil-Free D-Icer boasts an innovative motor design, high-efficiency for a superior product that costs no more than the competition. It is a powerful submersible motor-driven water circulation unit that prevents ice formation during winter months by continuously propelling warmer subsurface water up to the surface. The D-Icer keeps the area ice-free and is great for use around a boat or dock.Unique Design: The unique one-piece design of the shroud prevents large debris from being sucked through and damaging the propeller, a major cause of failure in other ice prevention devices.Purchase thermostat, flotation collar separately: Optional thermostat controls are available, as well as an optional flotation collar to hold the D-Icer near the surface for aerating (sold separately).Key FeaturesOil-free design: No chance of oil leaks polluting our environmentMore energy efficient than oil-filled units:Costs less to operate; pays for itselfMolded glass-filled nylon shroud: Guides water flow and blocks debrisStainless steel motor shaft and motor housing: Eliminates corrosionDual internal seals and double lip shaft seal: Keep water and dirt out for long lifeHigh-efficiency motor and high performance propeller: Give the most flow for your energy dollarsContinuous duty 120V or 230V single-phase motors: Can run non-stop for years without maintenanceStandard 50' or 100' field-replaceable power cords: Get you to the middle of the slip without modificationDesigned for saltwater environment with renewable zinc anode for corrosion protection: Thrives in salt or mineral filled waterEasy one-person insatallation:Fast setup allows use as a portable unit