14x28x1 Exact MERV 12 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION Opening roof top can slide

Opening roof top can slide out or lift up to prevent overheating

If the level decreases down below 200 ppmv in an enclosed growing area

【Effective & Quiet Ventilation Kit】Excellent smell control

• Warms root zone to optimal temperature

Suitable for all photosynthetic corals

14x28x1 Exact MERV 12 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION Opening roof top can slideNordic Pure MERV 12 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different