Uthfy 4000 CFM Swamp Cooler Review: A 13.5 Gallon Tank and Three Ways to Refill
Uthfy's 41 inch swamp cooler moves 4000 CFM, holds 13.5 gallons with 4 ice packs and can be refilled from the top, by hose or at the faucet.
By Daniel Brooks
Updated October 29, 2026
The Uthfy 41-Inch 4000 CFM Swamp Cooler is a 41 inch evaporative cooler with 4000 CFM, a 13.5 gallon detachable tank, 4 ice packs, a remote and three ways to refill. For more models, see our Evaporative Air Coolers page.
Our Verdict
This is our top overall evaporative air cooler. It combines strong airflow, a big tank and modern controls at a price well below commercial coolers.
Like every swamp cooler it needs dry air and ventilation, and it is large for a small bedroom, so it fits living rooms, garages and patios best.
Uthfy 41-Inch 4000 CFM Swamp Cooler
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Uthfy |
| Model | 41-inch 4000 CFM |
| Airflow | 4000 CFM, up to 34 ft/s |
| Water tank | 13.5 gallons, detachable, 4 ice packs |
| Refill | top pour, hose or remove the tank |
| Speeds and modes | 3 speeds, 3 modes |
| Oscillation | 120 degrees |
| Noise | 45 dB rated |
| Weight | 24.25 pounds |
Design
Upgraded 3-sided high-density cooling pads give the air more wet surface, and Uthfy rates the airflow at 4000 CFM with a wind speed of 34 ft/s.
The unit measures 20.94 by 14.76 by 40.35 inches and weighs 24.25 pounds. An LED ambient light adds a soft glow on a patio at night.
Controls
The remote and control panel cover 3 speeds and 3 modes (Normal, Natural and Cooling), 120 degree oscillation and a 12 hour timer. Uthfy rates the noise at 45 dB.
You can pour water into the upper tank, connect a hose to the water port, or remove the bottom tank and fill it at a faucet. Uthfy says the 13.5 gallon tank and 4 ice packs give up to 36 hours of cooling.
Placement Tips
Place the cooler near an open window or door, or with a window cracked on the far side of the room, so dry air can come in and humid air can escape. Aim the airflow at where you sit, sleep or work rather than into a corner.
Evaporative coolers work best in hot, dry weather. On humid days, switch off the pump or water mode and run the fan alone, since adding more moisture to damp air makes a room feel sticky rather than cooler.
Running Costs and Care
An evaporative cooler draws far less power than an air conditioner, so running costs are low. Budget for water and an occasional replacement pad instead of a big electricity bill.
Drain and rinse the tank regularly so water does not sit stale, and clean or replace the cooling pad as the maker recommends. Before storing the cooler for winter, run the fan without water so the pad dries completely and does not grow mildew.
How It Compares
Against the Uthfy 3880 CFM Swamp Cooler, this model has a larger, detachable tank and three refill options for a little more money.
Against the Hessaire MC37V, the Uthfy adds a remote, a timer and ice packs, while the Hessaire has rigid pads and a long track record.
Pros and Cons
| Pros | Cons |
|---|---|
| 4000 CFM airflow | Large for bedrooms |
| 13.5 gallon detachable tank | Needs ventilation |
| Three refill methods | Plastic build |
| Remote and 12 hour timer | Ice packs need freezing |
| Rated at 45 dB | Not for humid climates |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Large living rooms | Small bedrooms |
| Garages | Humid regions |
| Patios | Sealed rooms |
| Dry-climate homes | Very tight budgets |
For more options, see our picks for the best evaporative air coolers and the best evaporative coolers under 200.
Final Verdict
The Uthfy 41-Inch 4000 CFM Swamp Cooler is a well-equipped swamp cooler with a big tank and easy refilling for large rooms and patios. You can check the current price and details for the Uthfy 41-Inch 4000 CFM Swamp Cooler.
Frequently Asked Questions
What is the Uthfy cooler’s airflow?
4000 CFM, with wind speeds up to 34 ft/s.
How big is the tank?
13.5 gallons, detachable, with 4 ice packs.
How do I refill it?
From the top, by hose or by removing the bottom tank.
Does it have a remote?
Yes, plus a control panel and 12 hour timer.
How loud is it?
Uthfy rates it at 45 dB.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.