*PLUMBERSSTOCK EXPERT* responded:
Hi! Your interest for this ADP FSAN-75A-2 78013703 natural gas unit heater is highly appreciated. This heater requires a sealed flue collector and a power exhaust system to enable conventional vertical venting or horizontal venting. It comes with a 1/10 HP exhaust fan that allows horizontal venting to 25 ft. Please check pages 4 to 5 of this Specification Sheet for more details. To order this item, please click on Add to Cart and enter your zip code for shipping. To enjoy great discounts and avail our limited offers, please sign up to our newsletter by entering your email address on the bottom right section of this page. Thank you for shopping at PlumbersStock.com!