Keep your air purification system running its best by replacing the filter every 6 months. When it's time to replace the air filter in your Healthy Climate air purification system, trust the Filter Replacement to keep your air clean, clear, and breathable.This air purifier replacement filter is part number X6673 with the model number HCF20-10. Use this replacement air filter with Healthy Climate HC11 air purifiers. This replacement air filter measures 19-3/4 inches long, 24-3/4 inches wide, and 4-3/8 inches high.Designed to keep your air clean, this air filter is rated at MERV 11 efficiency. This means it can filter out particles in the air as small as 0.3 microns.Breathe easier in your home by replacing an old or dirty air filter with this Air Purifier Filter Replacement.