20x20x1 Fiberglass MERV 4 HVAC Air Filter 12 Pack Year Supply With Kraft Frame No Metal Made In USA Monthly Replacement For Clean Indoor Air In Your Home Or Office

20x20x1 Fiberglass MERV 4 Air Filter Pack - 12 Month Kraft ✔️ 12-pack year supply, 1 in thick, kraft frame, no metal

The fiberglass air filter uses a kraft board frame with reinforced grid and is metal-free. Ideal for light-to-medium filtration in homes, schools, hotels, and small offices, helping protect HVAC equipment and improve indoor air quality.

✅ Actual size 19.50" x 19.50" (495 x 495 mm), 1 in thick
✅ MERV 4 rating for basic dust capture
✅ Kraft frame with reinforced grids, metal-free
✅ Disposable filter, change every 30 days
✅ Pack of 12 filters, 1-year supply
✅ Made in USA
✅ Max operating temperature: 150%

💡 What is a MERV 4 fiberglass air filter used for in home and light commercial HVAC systems?

It's a handy, budget-friendly option for basic particle filtration and airflow management.

- Filters larger dust and lint in residential and light commercial HVAC
- Fits standard 20x20 openings with Kraft frame for easy installation
- Best used with monthly 30-day change-outs to maintain air quality
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