21x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack hydro-x we have developed a series

we have developed a series of various micron screens to allow you to efficiently create a perfect finished product

Available in duct diameter from 4’’ to 8’’

the HI 763100 is potentiometric probe with platinum sensors which allows for the possibility to measure high or low conductivity ranges using one probe

The TNC water pump is used in our AeroFlo2 60 units

21x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack hydro-x we have developed a seriesNordic 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