--- product_id: 47459059 title: "8\" x 4\" Round Reducer Duct Fitting, 26 ga." brand: "greenseam" price: "HK$209" currency: HKD in_stock: false reviews_count: 8 url: https://www.desertcart.hk/products/47459059-8-x-4-round-reducer-duct-fitting-26-ga store_origin: HK region: Hong Kong --- # 8" x 4" Round Reducer Duct Fitting, 26 ga. **Brand:** greenseam **Price:** HK$209 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** 8" x 4" Round Reducer Duct Fitting, 26 ga. by greenseam - **How much does it cost?** HK$209 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/47459059-8-x-4-round-reducer-duct-fitting-26-ga) ## Best For - greenseam enthusiasts ## Why This Product - Trusted greenseam brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Duct Reducer, For Nominal Duct Diameter 8 in, Inlet Diameter 8 in, Inside Diameter 8 in, Overall Length 6 in, Product Type Reducer, Weight 40.75 lb, Material Thickness 26 ga, Maximum Pressure Rating 3 in wc, Maximum Temperature Rating 212 Degrees F, Material Steel, Seal Material Not Applicable, Standards ASTM A653, ASTM A90, ASTM A924, SMACNA Third Edition 2005, Section, Shape Straight, Gas Appliance Category Not Applicable, Maximum Airflow Not Applicable, Outlet Diameter 4 in Review: 8" x 4" Round Reducer Duct Fitting, 26 ga. - This was used to reduce the outside air inlet from 8" to 4" for our furnace. When we had our 30 year old furnace replaced the company said there had to be an 8" outside air inlet. All they did was make a hole in the side of the house with a external screened duct. This was in the wood framing between the basement cement wall and main part of the house. They didn't bring it into the home any further. When the inspector came out he said it did not need to be that large. Since it was 8" hole in the side of the house it was cold in the basement in the winter. I checked several new homes in the area and none were larger than 4" inlets. In some, I saw no evidence of this outside inlet at all. Using the reducer was easier than trying to remove the 8" screened duct and reduce the 8" hole in the wood in the basement to 4". I have extended the duct work all the way to the furnace and down toward the floor for the outside air intake which should prevent the basement being cold in the winter while allowing sufficient outside air flow to the furnace. Review: Really a nicely made piece of sheet metal, heavy gauge, seams sealed and riveted - Just received this reducer today and opened up the box and found a beautiful piece of hardware! The big box hardware stores must have ruined my expectations. This piece of tin is beautifully made, seams are sealed and riveted and significantly heavy a guage that it's not readily deformed. If I sound a little overboard, well I like quality workmanship and it's kind of a pity it's going to go into my attic not to be seen. In short this is worth every penny, don't believe me, take this bad boy to home depot and compare it to their similar products. This one is really a quality made part. This is my opinion, I didn't get paid or given the item. If you need it, don't waste your time with looking anywhere else. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007ICSGEK | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #1,852,214 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,934 in HVAC Ducting | | Brand | GreenSeam | | Color | Silver | | Connector Type | Reducer | | Customer Reviews | 4.5 4.5 out of 5 stars (149) | | Date First Available | September 25, 2016 | | Exterior Finish | Zinc | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 1 pounds | | Item dimensions L x W x H | 8 x 4 x 7.5 inches | | Item model number | GRR8P4PGA26 | | Manufacturer | GREENSEAM | | Number of Pieces | 26 | | Part Number | GRR8P4PGA26 | | Product Dimensions | 8 x 4 x 7.5 inches | ## Product Details - **Brand:** GreenSeam - **Color:** Silver - **Connector Type:** Reducer - **Exterior Finish:** Zinc - **Item Weight:** 1 Pounds - **Item dimensions L x W x H:** 8 x 4 x 7.5 inches - **Manufacturer:** GREENSEAM - **Number of Pieces:** 26 ## Images ![8" x 4" Round Reducer Duct Fitting, 26 ga. - Image 1](https://m.media-amazon.com/images/I/51Sdi4OfSgL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 8" x 4" Round Reducer Duct Fitting, 26 ga. *by S***Z on October 10, 2019* This was used to reduce the outside air inlet from 8" to 4" for our furnace. When we had our 30 year old furnace replaced the company said there had to be an 8" outside air inlet. All they did was make a hole in the side of the house with a external screened duct. This was in the wood framing between the basement cement wall and main part of the house. They didn't bring it into the home any further. When the inspector came out he said it did not need to be that large. Since it was 8" hole in the side of the house it was cold in the basement in the winter. I checked several new homes in the area and none were larger than 4" inlets. In some, I saw no evidence of this outside inlet at all. Using the reducer was easier than trying to remove the 8" screened duct and reduce the 8" hole in the wood in the basement to 4". I have extended the duct work all the way to the furnace and down toward the floor for the outside air intake which should prevent the basement being cold in the winter while allowing sufficient outside air flow to the furnace. ### ⭐⭐⭐⭐⭐ Really a nicely made piece of sheet metal, heavy gauge, seams sealed and riveted *by L***. on December 30, 2020* Just received this reducer today and opened up the box and found a beautiful piece of hardware! The big box hardware stores must have ruined my expectations. This piece of tin is beautifully made, seams are sealed and riveted and significantly heavy a guage that it's not readily deformed. If I sound a little overboard, well I like quality workmanship and it's kind of a pity it's going to go into my attic not to be seen. In short this is worth every penny, don't believe me, take this bad boy to home depot and compare it to their similar products. This one is really a quality made part. This is my opinion, I didn't get paid or given the item. If you need it, don't waste your time with looking anywhere else. ### ⭐⭐⭐⭐ Good *by C***T on August 22, 2019* Typical reducer, ## Frequently Bought Together - 8" x 4" Round Reducer Duct Fitting, 26 ga. - ForeverPRO Dryer Vent Replacement for LG 3911EZ9131X - Fits LG Vent Dryer and LG Dryer Vent Replacement and LG Side Vent Kit for Dryer 3911EZ9131X 383EEL9001L 1266802 383EEL9001B AH3575086 EA3575086 - iPower 4 Inch Inline Duct Fan 100 CFM Booster Exhaust Fan with Low Noise for HVAC Ventilation in Attic, Bathroom, Basemen and Kitchen, 5.5' Grounded Power Cord Included, Silver --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/47459059-8-x-4-round-reducer-duct-fitting-26-ga](https://www.desertcart.hk/products/47459059-8-x-4-round-reducer-duct-fitting-26-ga) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-05-17*