8x20x1 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack AC / Dehumidification / Humidification The Full Spectrum Quantum Sensor

8x20x1 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack AC Dehumidification Humidification The Full Spectrum Quantum Sensor The Full Spectrum Quantum Sensor (MBS PAR) provides accurate and cost effective measurement of photosynthetically active radiation (PAR) from all light sources used to grow plants The EthylBloc™ technology powder contained in the sachet is released when the sachet is dipped in water This high performance HVAC replacement filter will outperform non electrostatic fiber glass filters Nordic Pure 8x20x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer