![Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice](https://preview.redd.it/tech-recommended-i-get-a-4-inch-filter-but-is-the-gap-on-v0-zizvfp6qkr0a1.jpg?width=640&crop=smart&auto=webp&s=e931b2871879226c2f629eefa25f6ad171203e64)
Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice
![20x24x4 MERV 8 AC Furnace 4" Inch Air Filters. 6 Pack. (Actual Size: 19-3/8 x 23-3/8 x 3-3/4) - Walmart.com 20x24x4 MERV 8 AC Furnace 4" Inch Air Filters. 6 Pack. (Actual Size: 19-3/8 x 23-3/8 x 3-3/4) - Walmart.com](https://i5.walmartimages.com/asr/c2f48a51-b77b-4e63-93cc-bd8e22bdd906.c13ab057a035e20dcb8d3f1322f8697f.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
20x24x4 MERV 8 AC Furnace 4" Inch Air Filters. 6 Pack. (Actual Size: 19-3/8 x 23-3/8 x 3-3/4) - Walmart.com
![Glasfloss ZL 20x25x4 MERV 10 Pleated 4" Inch Air Filters for AC and Furnace. 3 PACK. Actual Size: 19-1/2 x 24-1/2 x 3-3/4 - Amazon.com Glasfloss ZL 20x25x4 MERV 10 Pleated 4" Inch Air Filters for AC and Furnace. 3 PACK. Actual Size: 19-1/2 x 24-1/2 x 3-3/4 - Amazon.com](https://m.media-amazon.com/images/I/71bGopXyi+L.jpg)
Glasfloss ZL 20x25x4 MERV 10 Pleated 4" Inch Air Filters for AC and Furnace. 3 PACK. Actual Size: 19-1/2 x 24-1/2 x 3-3/4 - Amazon.com
![Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice](https://preview.redd.it/tech-recommended-i-get-a-4-inch-filter-but-is-the-gap-on-v0-d9yl9q6qkr0a1.jpg?width=640&crop=smart&auto=webp&s=ae171fb1d6283c02d4342bc37dda4971ff15767e)
Tech recommended I get a 4 inch filter, but is the gap on the right too large to be effective? : r/hvacadvice
![Glasfloss ZL 16x25x4 MERV 10 Pleated 4" Inch AC Furnace Air Filters. Box of 4. Actual Size: 15-1/2 x 24-1/2 x 3-3/4 - Amazon.com Glasfloss ZL 16x25x4 MERV 10 Pleated 4" Inch AC Furnace Air Filters. Box of 4. Actual Size: 15-1/2 x 24-1/2 x 3-3/4 - Amazon.com](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61R41ckS0KL.jpg)