Achieving comfortable outdoor living or entertaining areas in harsher climates can be a challenge. Not only do you have to deal with cold weather, but most patio heaters, are prone to damage from exposure to moisture and corrosive sea air. That's where Infratech's CD 39" Dual Element Marine Grade Electric Heater comes in. With its Marine UpGrade 316 Stainless Steel Construction, this heater is certified to keep your outdoor space warm and cozy without worries about corrosion or damage in harsh environments. In addition to a sleek design that tucks away mounting brackets, an optionalflush mount frameprovides a seamless installation to the ceiling. Through infrared heat, not even a fraction of the energy goes to waste, as it only warms up solid objects. The 4000 W models provide enough warmth for areas of 8 x 10 ft and 9 x 10 ft, respectively, in areas with mildly cold temperatures. For more information on setup recommendations, see this helpfulInfratech Heat Coverage Guide. Note that heaters of more than 240 V are for commercial use only. Get twice the power of a Single Element Heater from Dual Element Heaters. With aduplex stack switch, it can be set at high/low. Smart home integration is also available. Bask in the luxurious warmth of one of the best electric patio heaters on the market. It will match any modern setting. Buy now and enjoy free shipping! This heater is also available in other sizes:Infratech CD Series Collection Marine Grade Electric Heaters have a lead time of 1 to 2 weeks. Special orders on custom voltages will take 2 to 4 weeks. Need help determining the right heater and setup for your space and heating needs? Or, do you need more information about the current lead time? Give us a call at (866) 713-2399 or email us [email protected] we'll be happy to help! What's Included:Electric Patio Heater, Mounting Bracket, and User's Manual Optional Accessories:Flush Mount Kit,Other Control Options, andAccess Door