Spacegard Pure Air PCO-12U Spacegard Or Aprilaire Upgrade Kit. Designed as an upgrade for clients that already have a Spacegard or Aprilaire model 2400 whole house air cleaner installed. Comes uncased and slides right into the existing Spacegard or Aprilaire air cleaner cabinet. High efficiency air purification system for your whole house. Manufactured by Lennox Corp. This device catches particles larger than .3 microns with the prefilter. Smaller items such as mold, bacteria, odors and chemicals are then destroyed by the UVA lamp and titanium dioxide metal insert. Model number 12C is designed for convenient installation with any type forced air heating/cooling system. Plugs into a standard 120 volt outlet. Installation may require minor sheet metal work.