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Spectral distribution optimized for photosynthesis efficiency
Remove the detachable funnel lid and place it funnel-side down on your scale
- It has an automatic operating cycle that triggers the fan and light source
and increasing your growing success with starts
20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Water Heaters Chillers Spectral distribution optimized for photosynthesisNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition
