TR21-A 10 K ohm NTC non-linear Temperature Wall Module
Honeywell TR21-A | Our#: 176405
1 Year Purchase Guarantee - Free returns for a year, up to $1000 of purchase protection.
Save Your Furnace Tip #4:
MERV stands for Minimum Efficiency Reporting Value, and measures a filters’ efficiency in removing small particles. The higher the MERV rating, the more particles the filter can remove.