18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Blade this thermostat guard is an

this thermostat guard is an ideal solution for residential

actual front end outer dimensions are approximately 13

actual front end outer dimensions are approximately 12 5/8" width X 18 5/8" height

+ Product Details Size – 24"w X 20"h is the size for the duct opening measurement only

compatible with duct 6" | 10 PACK of 2' pipe - 20-foot length when connected– 30 gauge thick & made of thick & durable galvanized sheet metal

18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Blade this thermostat guard is an+ Product Details Size 18"w X 12"h pleated MERV 2 filter for HVAC return filter grille 12 Pack. Actual dimensions: 17. 75" X 11. 75" High Quality A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system Design The W shaped pleats increase the surface area, effectively capturing dirt and particles such as pollen, dust mites, standing dust, spray paint