Your furnace and air conditioner will love our MERV 8 16x25x4 electrostatic air filter. Our MERV 8 pleated filters are engineered to help protect your HVAC system from most airborne particles, leading to a longer life span and less repair costs on your A/C and furnace. Plus, your family or co-workers will benefit from inhaling air which is cleaner, safer, and healthier.