Harman 52i Outside Air Kit. Add to your Accentra 52i to allow for outside air - Outside air provides higher efficiency levels - more heat, less fuel. It will also lower vent clearances to windows and allows your Harman to become Energy Star Rated. Outside air is required for mobile home installations. Hardware and instructions are included. Guaranteed Harman / HHT OEM Part Accessory. Tech support for any install or troubleshooting needs. Over 20 years of trusted value and commitment to our customers. The item "Harman Accentra 52i Fireplace Pellet Stove Outside air assembly Kit 1-00-574350" is in sale since Friday, September 8, 2017. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Replacement Parts". The seller is "esesstoves" and is located in Dale, Wisconsin. This item can be shipped worldwide.