20x26x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack commercial-greenhouse-fixtures Four-layer design makes it more

Four-layer design makes it more durable and resistant to leaks

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Quantity of LEDs - 684pcs

FMWH3120L is used for (2) 4' bulbs (one on the FLP/T44

Dimming - Manual & Rj11 Controller

20x26x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack commercial-greenhouse-fixtures Four-layer design makes it moreNordic Pure Custom MERV 13 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