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The smart filter monitor, and the filters it reorders for you
smart filter monitor
The hardware
MySmartFilter Monitor
The smart filter monitor: measures the pressure drop across your furnace filter and tells you when replacing it costs less than the energy it wastes. Includes the full install kit and power adapter.
- ✓ 15-minute install — drill one small hole on each side of your filter
- ✓ Live dashboard + Home Assistant, free forever
- ✓ Add Filter AutoShip and filters ship themselves — no fees
Arrives assembled with the install kit — tubes, grommets, power adapter, and the QR setup label. See how installation works →
Replacement Filters
📏 How to Find Your Filter Size
Check the side of your current filter for dimensions (e.g., 20x20x1). The format is Width × Height × Depth in inches. If you've set up a Smart Filter device, we can remember your preferred size for automatic reorders.
Standard Air Filter 14x14x1
14x14x1
MERV 8MERV 8 rated. Dimensions: 14" × 14" × 1"
Standard Air Filter 14x20x1
14x20x1
MERV 8MERV 8 rated. Dimensions: 14" × 20" × 1"
Standard Air Filter 14x25x1
14x25x1
MERV 8MERV 8 rated. Dimensions: 14" × 25" × 1"
Standard Air Filter 16x16x1
16x16x1
MERV 8MERV 8 rated. Dimensions: 16" × 16" × 1"
Standard Air Filter 16x20x1
16x20x1
MERV 8MERV 8 rated. Dimensions: 16" × 20" × 1"
Premium Air Filter 16x20x1
16x20x1
MERV 11MERV 11 rated. Dimensions: 16" × 20" × 1"
Hospital-Grade Filter 16x20x1
16x20x1
MERV 13MERV 13 rated. Dimensions: 16" × 20" × 1"
Standard Air Filter 16x25x1
16x25x1
MERV 8MERV 8 rated. Dimensions: 16" × 25" × 1"
Premium Air Filter 16x25x1
16x25x1
MERV 11MERV 11 rated. Dimensions: 16" × 25" × 1"
Hospital-Grade Filter 16x25x1
16x25x1
MERV 13MERV 13 rated. Dimensions: 16" × 25" × 1"
Deep Pleat Filter 16x25x2
16x25x2
MERV 8MERV 8 rated. Dimensions: 16" × 25" × 2"
Extended Life Filter 16x25x4
16x25x4
MERV 11MERV 11 rated. Dimensions: 16" × 25" × 4"
Standard Air Filter 18x18x1
18x18x1
MERV 8MERV 8 rated. Dimensions: 18" × 18" × 1"
Standard Air Filter 18x20x1
18x20x1
MERV 8MERV 8 rated. Dimensions: 18" × 20" × 1"
Standard Air Filter 20x20x1
20x20x1
MERV 8MERV 8 rated. Dimensions: 20" × 20" × 1"
Premium Air Filter 20x20x1
20x20x1
MERV 11MERV 11 rated. Dimensions: 20" × 20" × 1"
Hospital-Grade Filter 20x20x1
20x20x1
MERV 13MERV 13 rated. Dimensions: 20" × 20" × 1"
Deep Pleat Filter 20x20x2
20x20x2
MERV 8MERV 8 rated. Dimensions: 20" × 20" × 2"
Standard Air Filter 20x22x1
20x22x1
MERV 8MERV 8 rated. Dimensions: 20" × 22" × 1"
Standard Air Filter 20x25x1
20x25x1
MERV 8MERV 8 rated. Dimensions: 20" × 25" × 1"
Premium Air Filter 20x25x1
20x25x1
MERV 11MERV 11 rated. Dimensions: 20" × 25" × 1"
Hospital-Grade Filter 20x25x1
20x25x1
MERV 13MERV 13 rated. Dimensions: 20" × 25" × 1"
Deep Pleat Filter 20x25x2
20x25x2
MERV 8MERV 8 rated. Dimensions: 20" × 25" × 2"
Extended Life Filter 20x25x4
20x25x4
MERV 11MERV 11 rated. Dimensions: 20" × 25" × 4"
Standard Air Filter 24x24x1
24x24x1
MERV 8MERV 8 rated. Dimensions: 24" × 24" × 1"
Premium Air Filter 24x24x1
24x24x1
MERV 11MERV 11 rated. Dimensions: 24" × 24" × 1"
Standard Air Filter 25x25x1
25x25x1
MERV 8MERV 8 rated. Dimensions: 25" × 25" × 1"
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