New Comfort NEW UV GERMICIDAL BULB for All 3500 Air Purifier Models Brand New Replacement UV Germicidal Purifier bulb made by New Comfort for the CH3500, CA3500, and BA3500 models. Will only fit the CH3500, CA350, and BA3500 models. Safely takes airborne bacteria, virus, odors and germ microbes and destroys them. Tests had proven that all viruses are susceptible to germicidal UV for complete eradication. Help keep the flu and other sick causing virus's at bay with help from this next generation Air Purifier.