Replacement lamp- 1082 SIPT (GFI #4941);Replacement ballast- 010303 (GFI #4961);Voltage- 24;Homes size (square feet)- Up to 4,000;Lamp length (inches)- 14;Dimensions (inches)- 16 L x 4 W x 5 H;Installation- in duct and / or over coil;Warranty (years)- ballast - lifetime, lamp - 1;Photocatalytic oxidation technology