TR21 - 20K OHM TEMP SENSOR
Honeywell TR21 | Our#: 176419
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.