21_1/4x23_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Monterey Lawn & Garden Products When used with a temperature

When used with a temperature controller and tray domes

Small amounts of micro-particles are occasionally visible in some conditions but will not affect mineral balance or system compatibility

• ASOV (automatic shut off valve so drain line shuts down when product line is shut down)

• Spotlight a treasured terrarium or orchid

21_1/4x23_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Monterey Lawn & Garden Products When used with a temperatureNordic Pure Custom MERV 10 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