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4Pcs Foam Blocks for U‑Shaped Window AC Units, AC Insulation Seal Kit — Open-Box, 32% Off
Brand: Mellisore
Condition: Used - Mint
$1151
$1699
-32% Save $548
Updated: 36 days ago
Description
Universal Compatibility & Customizable Fit: Engineered for all U-shaped air conditioners. The kit includes various block options to accommodate different window types (lip or flat). The foam is easy to cut with a standard knife, allowing you to trim it to your exact measurements for a perfect fit.
Complete Sealing Kit: Effectively seals side and bottom gaps between the window and the air conditioner. The package includes foam blocks, a self-adhesive insulation foam roll for sealing smaller gaps, and double-sided tape for secure installation.
Improve Energy Efficiency: By creating a robust barrier, these foam panels prevent hot outdoor air from entering during summer and stop warm indoor air from escaping in winter. This reduces the workload on your HVAC system, leading to lower heating and cooling costs.
Superior Material Quality: Constructed from premium EVA foam, these blocks offer excellent thermal insulation, sound dampening, and weather resistance. The material is durable, environmentally friendly, and designed to withstand seasonal changes.
All-Weather Protection & Enhanced Comfort: Provides a multi-functional seal that blocks pollen, insects, dust, drafts, and outside noise. This not only improves your indoor air quality and comfort but also gives your window a clean, finished appearance.
Specification:
Fits all U-shaped ACs: Includes blocks for lip or flat windows. Easy to cut for a perfect custom fit.
Complete All-in-One Kit: Comes with foam blocks, a foam seal roll, and double-sided tape to seal side and bottom gaps.
Boosts AC efficiency: Blocks outside heat in summer and retains indoor warmth in winter, helping you save on energy bills.
Premium EVA foam: Provides excellent insulation, reduces noise, and is durable enough to last through all seasons.
Blocks pollen, bugs, noise & drafts: Creates a clean barrier that enhances your home comfort and air quality.
Easy DIY setup: Simply measure, cut with a knife, and stick in place using the included tape.
Material: High-Quality EVA Foam
Options:
Option A (2-Pack): 2 Foam Blocks, 1 Insulation Foam Roll, 6 Adhesive Tapes. Suitable for lip-style windows.
Option B (4-Pack): 2 Foam Blocks, 2 Stackable Foam Blocks, 1 Insulation Foam Roll, 6 Adhesive Tapes.
Suitable for flat-style windows.
Please confirm your window height compatibility before purchasing.
Note:
1. Due to the light and screen difference, the item's color may be slightly different from the pictures.
2. Please allow 1-2 cm differences due to manual measurement.
Fits all U-shaped ACs: Includes blocks for lip or flat windows. Easy to cut for a perfect custom fit.
Complete All-in-One Kit: Comes with foam blocks, a foam seal roll, and double-sided tape to seal side and bottom gaps.
Boosts AC efficiency: Blocks outside heat in summer and retains indoor warmth in winter, helping you save on energy bills.
Premium EVA foam: Provides excellent insulation, reduces noise, and is durable enough to last through all seasons.
Blocks pollen, bugs, noise & drafts: Creates a clean barrier that enhances your home comfort and air quality.
Easy DIY setup: Simply measure, cut with a knife, and stick in place using the included tape.
Material: High-Quality EVA Foam
Options:
Option A (2-Pack): 2 Foam Blocks, 1 Insulation Foam Roll, 6 Adhesive Tapes. Suitable for lip-style windows.
Option B (4-Pack): 2 Foam Blocks, 2 Stackable Foam Blocks, 1 Insulation Foam Roll, 6 Adhesive Tapes.
Suitable for flat-style windows.
Please confirm your window height compatibility before purchasing.
Note:
1. Due to the light and screen difference, the item's color may be slightly different from the pictures.
2. Please allow 1-2 cm differences due to manual measurement.
Sold by
Amazon Warehouse
Official Amazon outlet for open-box & returned items
- Backed by Amazon's A-to-Z Guarantee
- 30-day return policy
- Ships from Amazon fulfillment centers
- Price verified on Amazon
Product Details
- SKU:
- awhd-us-b0gs8m82hm
- Model:
- 22446920
- Country:
- US
- ASIN:
- B0GS8M82HM
Shopping Smarter
Common questions about buying open-box and refurbished.
Why buy refurbished or open-box?
Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $5 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.
What's the difference between open-box and refurbished?
Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.
Why use OpenBoxFox?
Finding refurbished deals is time-consuming — you'd have to check Amazon Warehouse, Reebelo, Dyson Outlet, and others separately for Mellisore products. OpenBoxFox aggregates these listings in one place, so you can compare and find the best deal without the legwork. We update pricing daily so you always see current availability and real savings.
Is it safe to buy refurbished?
Yes. Products listed on OpenBoxFox come from established retailers like Amazon, Reebelo, and Dyson — not unknown third-party sellers. Each retailer has buyer protection policies, return windows, and in some cases warranties. You get the price advantage of used goods with the purchase security of a known retailer.
