What size room does the vevor S03 PRO cool?

2,050 BTU of real cooling (SACC) suits about 50 to 100 sq ft with normal sun and two people (about 45-90 sq ft if very sunny), by the ENERGY STAR floor-area table. Size by SACC, not the larger BTU on the box.

How many watts does the vevor S03 PRO use, and what does it cost to run?

About 466 watts at full power (2,050 BTU/h divided by its CEER of 4.4), roughly 4.1 amps if it runs on 115 V. At 750 hours a year and 18.0¢/kWh that is about $63, which is $46 less than the typical certified 5,000 BTU or less portable unit ($109). Its CEER beats 0% of the 461 certified models in its size class.

Is a one-hose portable air conditioner a problem?

It is the common design: 100% of the certified 5,000 BTU or less models have one hose, with a median of 6.2 CEER. The top-ranked Foshan Hanyang HYAC-TG7 reaches 13.4 CEER.

Do I have to empty the vevor S03 PRO?

Usually not. It evaporates the water it removes and sends it out through the exhaust hose. In very humid weather the pan can still fill, and most units then stop and ask to be drained, so keep a drain hose or a bucket handy.

Can the vevor S03 PRO also heat the room?

No, it only cools. 6 of the 461 certified 5,000 BTU or less portable models can also heat if you want one unit for the year.

2,050 BTU (SACC) single-hose portable air conditioner

vevor S03 PRO

Below average efficiency for its size: a CEER of 4.4 beats 0% of the certified 5,000 BTU or less portable air conditioners.

The vevor S03 PRO delivers 2,050 BTU of real cooling (SACC), enough for about 50-100 sq ft, draws about 466 watts and costs about $63 a year to run at typical U.S. use and prices.

CEER: 4.4 Combined efficiency, higher is better
Below average · beats 0%
Real cooling: 2,050 BTU/h (SACC)For about 50-100 sq ft
Energy use: 349 kWh/yrAbout 466 W, at 750 hours a year
Design: One hose Uses room air for its condenser

A good fit if…

You do not want to empty a bucket - it evaporates the water and sends it out through the hose in normal weather.

Think twice if…

Running cost matters most - its CEER is below average for 5,000 BTU or less portable air conditioners.
You want the most efficient design - one-hose units pull warm air in through gaps; dual-hose units lead the efficiency ranks.
You also need heat - it cools only.
You need to cool more than a very small room - this size covers about 100-150 sq ft at most.

Calculate my running cost Check the size for my room

Details

Certified ratings2,050 BTU SACC, 4.4 CEER

Performance
Real cooling capacity (SACC)Seasonally adjusted cooling capacity: what the unit delivers in the DOE test, after the heat it lets back in	2,050 BTU/h
CEERCombined energy efficiency ratio, includes standby power	4.4
Power drawSACC divided by CEER	About 466 W
Yearly energy use750 hours of cooling a year	349 kWh
Design
Hose design	Single-duct (one hose)
Heating	No, cooling only
Compressor	Single speed
Water removal	Self-evaporating (exhausts the water through the hose)
Certification
Certified model numbers	1 (1 basic model)
Brands	1
Size class	5,000 BTU and under

Model numbers with these ratings1 from 1 brand

These model numbers are certified with the same capacity, efficiency, hose design, heating, drain type and compressor as the vevor S03 PRO.They may be the same unit sold under several brands, or different products that test the same: the DOE data has no dimensions or noise figures, so check those with the maker. Ratings within about 2% in capacity and 0.3 in CEER are treated as the same; a model whose own rating differs a little shows it in brackets.

vevorS03 PRO

How it compares with the other 5,000 BTU or less portable units19 rating profiles

CEER (class median 6.2)4.4, tied with 1 other profile
Yearly cost vs. class median ($109)$46 less
Efficiency rank among 19 rating profiles#18
Models in the class with two hoses0%

Compared with every DOE-certified portable unit in the same size class (SACC). Each model number counts once. Yearly cost at 750 hours and 18.0¢/kWh.

Yearly running cost by city$8-$126

This unit at each city's cooling hours and state electricity price.

City	Hours	¢/kWh	Per year
Phoenix, AZ	1675	15.5	$121
Houston, TX	1400	16.0	$104
Miami, FL	1750	15.4	$126
Atlanta, GA	775	15.1	$54
New York, NY	525	28.4	$69
Chicago, IL	475	19.0	$42
Denver, CO	350	16.6	$27
Seattle, WA	125	14.2	$8

Ranked around it in the 5,000 BTU and under class#18 of 19

#	Model	BTU (SACC)	CEER	Per year
15	Fehom KOW60A	4,500	5.9	$103
16	GOUKA GK-LB1-UBRF	2,800	5.0	$76
17	GOUKA GK-LB1-URF	2,800	5.0	$76
18	vevor S03 PRO	2,050	4.4	$63
19	vevor S02	2,000	4.4	$62

Questions5

What size room does the vevor S03 PRO cool?: 2,050 BTU of real cooling (SACC) suits about 50 to 100 sq ft with normal sun and two people (about 45-90 sq ft if very sunny), by the ENERGY STAR floor-area table. Size by SACC, not the larger BTU on the box.
How many watts does the vevor S03 PRO use, and what does it cost to run?: About 466 watts at full power (2,050 BTU/h divided by its CEER of 4.4), roughly 4.1 amps if it runs on 115 V. At 750 hours a year and 18.0¢/kWh that is about $63, which is $46 less than the typical certified 5,000 BTU or less portable unit ($109). Its CEER beats 0% of the 461 certified models in its size class.
Is a one-hose portable air conditioner a problem?: It is the common design: 100% of the certified 5,000 BTU or less models have one hose, with a median of 6.2 CEER. The top-ranked Foshan Hanyang HYAC-TG7 reaches 13.4 CEER.
Do I have to empty the vevor S03 PRO?: Usually not. It evaporates the water it removes and sends it out through the exhaust hose. In very humid weather the pan can still fill, and most units then stop and ask to be drained, so keep a drain hose or a bucket handy.
Can the vevor S03 PRO also heat the room?: No, it only cools. 6 of the 461 certified 5,000 BTU or less portable models can also heat if you want one unit for the year.

Running cost calculator

Pre-filled with these ratings. Pick your state and how many hours you run it, or see what portable units cost to run in every state.

1. The air conditioner vevor S03 PRO

Cooling capacity BTU/hCEER efficiency, higher is better

2. How you use it

StateElectricity ¢ per kWhHours a day at full powerDays a year from your state's climate

Per year: $98
Per month of use: $18
Per day: $0.60
Per hour: 7.5¢
Power draw: 466 W

Electricity used: 615 kWh a yearAn old 9 CEER unit of the same size would cost $48

Power draw is capacity divided by CEER, which already includes standby power. Inverter units often run below full power, so real use can be lower. Electricity prices: U.S. EIA residential averages (12 months to July 2026). Days a year start from your state's cooling degree days (NOAA 1991-2020 normals).

Closest alternatives

Rating profiles with a similar CEER in the same size class, and what sets each one apart from the vevor S03 PRO.

Model	CEER	Compared with this one
vevor S02	4.4	same CEER, 50 BTU less cooling
GOUKA GK-LB1-UBRF	5.0	0.6 CEER higher, 750 BTU more cooling, also heats, condensate pump
GOUKA GK-LB1-URF	5.0	0.6 CEER higher, 750 BTU more cooling, condensate pump
Fehom KOW60A	5.9	1.5 CEER higher, 2,450 BTU more cooling
GARVEE KY-8K/07E	6.2	1.8 CEER higher, 2,700 BTU more cooling

See all 19 5,000 BTU or less portable air conditioners, ranked

Before you buy

The Department of Energy lists every certified model, including some no longer sold: check availability before you buy. Source: U.S. Department of Energy, Compliance Certification Database (portable air conditioners), updated 2026-10-14. How we use the data.