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FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green
✅ In stock
F
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 29, 2026 8:27 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price sits right around what this item typically fetches.
- 📉No lower price has surfaced in the past twelve months, making this one of the standout deals in recent memory.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
5.8/20
Deal Strength
16/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Filter Monster
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓PROTECT YOUR HVAC SYSTEM: FilterLock is a patented two-piece magnetic seal system designed for furnace systems with 1” air filters, eliminating air leakage at the filter slot/door to enhance indoor air quality and reduce energy consumption.
✓IMPROVE AIR QUALITY: Prevent harmful airborne contaminants such as allergens, dust, and gases like carbon monoxide from entering your HVAC system. Properly sealing the filter slot/door ensures that pollutants don’t bypass the air filter.
✓ENERGY EFFICIENT: Reduce utility bills and save energy by effectively stopping air leaks in your HVAC system. This not only enhances overall indoor air quality but also addresses one of the four major ductwork issues identified by Energy Star—air leakage at the filter slot.
✓EASY TO INSTALL: Enjoy hassle-free installation with FilterLock’s universal, one-size-fits-all seal that magnetically attaches to ductwork to cover the furnace filter slot door. This convenient two-piece design is compatible with any 1” furnace filter up to 25” long.
✓ADDITIONAL FEATURES: Benefit from a reusable, easy on/easy off magnetic design that ensures long-term use. Once both pieces are installed, the seal measures approximately 25 x 4.8 x 0.1 inches, providing a perfect fit for your needs.
⚙️ Specifications
25 x 4.8 x 0.1 inches
2.08 ounces
AllergyZone, LLC
B00PKS6MT0
AZFL-100
4.4
See Top 100 in Tools & Home Improvement
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No
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Product Dimensions
25 x 4.8 x 0.1 inches; 2.08 ounces
Item Weight
2.08 ounces
Manufacturer
AllergyZone, LLC
ASIN
B00PKS6MT0
Item model number
AZFL-100
Customer Reviews
4.4
