6"-4" Reducer for 6" AC Infinity Inline Fan
6"-4" Reducer for 6" AC Infinity Inline Fan
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- ALLOWS YOU TO CONNECT A 4" HOSE to your 6" fan
- SPECIFICALLY DESIGNED TO FIT the AC Infinity 6" Inline fan
- LEAK FREE GUARANTEE: Innovative design features a unique inner lip that diverts exhaust fumes away from the joints making it impossible to leak
- ELIMINATE THE NEED FOR CLAMPS OR TAPE so your setup looks clean
- METICULOUSLY DESIGNED for beauty and function
- EACH PART IS TEST FITTED by hand to ensure a perfect fit
- INSTALLS EASILY by hand; no tools needed
- RETURN POLICY we accept returns anytime. Just send us an email
Shipping & Delivery
Shipping & Delivery
See top red banner for current lead times (shipping is FREE for most U.S. orders)
Canadian orders ship for an extra $25-$55 depending on service requested.
Our Return Policy
Our Return Policy
Custom Window Inserts have a 50% refund policy. All non custom items are eligible for a 100% refund. Fill out our form on our Contact page to start an order return.
Custom Products
Custom Products
Send an email to Joe@MartinsonManufacturing.com and let's have a conversation about what you need. We'll often make custom adapters for the same sales price as the current ones we offer.
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Perfect Fit Guarantee
Didn't fit perfect? We'll make it right or give you a refund.
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Manufactured in the USA
Each part is made and test fitted by hand right here in the U.S.A.
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Meticulously Designed
Designed by an engineer for function and beauty.
Recent Customer Testimonials
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Janelle T.
I love how classy it makes it look. Better than a piece of wood that molds over time.
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Kevin M.
There is NO smell now, even with both lasers running, didn’t think I’d ever be able to say that.
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Cynthia F.
We received the inserts and wanted to let you know that everything from their construction to the packaging was absolutely flawless!
Made with Care
Martinson Manufacturing is a home-based family business in West Bend, Wisconsin whose mission is to create meticulous exhaust venting solutions to eliminate headaches and simplify people's lives.