We offer tracked and insured shipping for all of our orders. Order processing takes 1-3 business days before shipment.
241
reviews
Revolution Window Air Conditioner
Fast, efficient cooling that keeps your window open, reduces humidity, and lowers energy bills all summer long
✔️Cools rooms fast up to 550 sq ft
✔️Reduces humidity noticeably in humid rooms
✔️Keeps window open for fresh airflow
✔️Lowers energy use and monthly bills
Fast Shipping
Free Returns
30-Day Money Back Guarantee
I was skeptical at first but this unit changed my summer. It cools my whole living room quickly, keeps humidity down, and still lets fresh air in through the window. Setup took under 20 minutes and the remote makes life easy. Worth the purchase for hot, sticky days.
Paul N.
Shipping Information
Return Policy
We love our products and are confident you will too! That's why we are offering a 30-Day, Risk-Free Trial. If you are not in love with your results, we will give you a refund.
Your cart
Room too hot and stuffy during summer evenings
Stop sweating through the night. The U-shaped design cools rooms fast while keeping fresh air and daylight flowing. You get a cool, ventilated bedroom without sealing your window into a hot, stale box.
Cooler rooms without sacrificing fresh air or light
U-shaped design plus efficient cooling lets you enjoy fresh airflow, natural light, and steady temperatures for comfortable living spaces all day.
❄️
Rapid Cool
Drops room temperature quickly for fast relief.
🌬️
Fresh Air
Window stays open so fresh air continues to circulate.
💧
Humidity Control
Removes moisture to make rooms feel cooler and drier.
📉
Energy Save
Uses less power to maintain comfortable temps.
What Makes Lumen CoolFlow Pro Window AC Special
Unlike others that seal your window and waste energy, this unit preserves airflow, adds dehumidifier function, cools fast, and runs more efficiently for lower monthly costs.
Revolution Window Air Conditioner
Others
U-shaped
Fast
Quiet
Dehumidify
Affordable
See the real impact on home comfort
97%
Reported that rooms cooled faster on arrival after using timer feature.
96%
Experienced noticeably lower humidity levels on humid days with dehumidifier mode.
95%
Noticed energy bills stayed stable thanks to energy-saving operation.
High energy bills from old inefficient units
Cut running costs with energy-saving certified modes. The CoolFlow Pro cools effectively at lower power, so your AC works less and your electricity bill rises less after installation.
Common questions about Lumen CoolFlow Pro
Clear answers to help you buy with confidence and install quickly
How large a room can this cool effectively?
How large a room can this cool effectively?
Choose 10,000 BTU for up to about 450 sq ft; pick 12,000 BTU for up to 550 sq ft or taller ceilings. Results vary with insulation and sun exposure.
Will it block my window or darken the room?
Will it block my window or darken the room?
No. The U-shaped design fits in the sash while leaving space for airflow and daylight, so your room stays bright and ventilated.
Is installation difficult or tool-heavy?
Is installation difficult or tool-heavy?
Installation is simple and usually under 20 minutes with the included kit. No heavy tools required and clear instructions make setup fast.
How does the dehumidifier mode help comfort?
How does the dehumidifier mode help comfort?
Dehumidifier mode pulls moisture from the air so the space feels cooler and less sticky without overcooling, ideal for humid climates.
What if I don't like it after purchase?
What if I don't like it after purchase?
You have 30 days to return for a full refund. We provide prepaid return labels and process refunds quickly for a risk-free trial.
30 Day Money Back Guarantee on Lumen CoolFlow Pro
Try Lumen CoolFlow Pro risk-free for 30 days. If it doesn't cool faster, reduce humidity, or lower running costs as promised, return it for a full refund. We cover return shipping and process refunds promptly so you can buy confidently.
What customers are saying
Real feedback from verified buyers
Chris J.
Verified Buyer
Game changer! 🔥
Eric K.
Verified Buyer
Dehumidifier mode made my bedroom feel so much more comfortable on humid nights, no more sticky sheets.
Ryan C.
Verified Buyer
Cool air fast, remote works from the far end of the room, and installation was straightforward with the kit provided.
Scott W.
Verified Buyer
Installed this in my studio and it was a game changer. Setup was simple, the U-shaped design keeps my window usable, and I can run it quietly overnight with the timer. It even helped lower the humidity so I slept better, and the remote means no getting up to change settings.
Michael S.
Verified Buyer
Love it! ❤️
Tom H.
Verified Buyer
Perfect for my open-plan living area; cools evenly and keeps the window usable so the room feels airy.
Stephen G.
Verified Buyer
Bought for a 500 sq ft den and it cools that space down fast. The fresh airflow around the sides keeps things from feeling sealed in.
Jason M.
Verified Buyer
Energy bill barely budged after using energy-saving mode, which was a huge relief.
Brian L.
Verified Buyer
Really surprised by how much fresh air still comes in while it runs, no stuffy feeling at all.
David R.
Verified Buyer
Super cold, fast.
Alan V.
Verified Buyer
I live in a humid climate and this made nights way more comfortable. It removes moisture without blasting cold, and my energy use stayed reasonable.
Paul N.
Verified Buyer
Solid cooling for larger rooms, handles high ceilings better than my old unit and doesn’t block the window completely.
Luke O.
Verified Buyer
Good unit overall but wish the fan had one more speed. Still, it cools quickly and the dehumidifier setting helps immensely during summer storms.
Matthew A.
Verified Buyer
I set the 24-hour timer to start cooling before I get home and it’s perfect every day. No more walking into a hot apartment.
Adam B.
Verified Buyer
Does a great job in my second-floor apartment; fan and timer settings make it simple to manage while I’m at work.
Kevin D.
Verified Buyer
Installed in 15 minutes, timer is clutch for evenings.
John P.
Verified Buyer
Works great, finally comfy.