Mountman: 18 DOE certified models

Key findings

• Highest certified cooling capacity among its portable ACs: Mountman HYMAC14CD1 at 10,200 BTU/h SACC.
• Most efficient for its class: Mountman HYMAC14CD1, CEER 7.9, higher than 738 of the 1,044 single hose portable ACs certified to DOE.

Portable air conditioners

10 Mountman portable ACs, listed models first. DOE data as of 2026-11-03.

#	Photo	Model	Labels	SACC, BTU/h	Covers	CEER	Hose	Heat	Brands	Amazon
1		MountmanHYMAC14CD1filed as AIR CHOICE NPH-10H/X1E	CEER 7.9 Single hose Sold under 10 brands	10,200SACC, up to 450 sq ft	450 sq ft	7.9	Single hose	No	10	Check price on Amazon
2		MountmanHY10MAC002	CEER 7.2 Single hose Sold under 2 brands	6,250SACC, up to 250 sq ft	250 sq ft	7.2	Single hose	No	2	Check price on Amazon
3		MountmanOL-A016LF06N3	CEER 7.2 Single hose Sold under 3 brands	6,250SACC, up to 250 sq ft	250 sq ft	7.2	Single hose	No	3	Check price on Amazon
4		MountmanHYMAC10CD1filed as Antarctic Star NPL-06C/X1E	CEER 6.6 Single hose Sold under 24 brands	6,000SACC, up to 250 sq ft	250 sq ft	6.6	Single hose	No	24	Check price on Amazon
5		MountmanOL-A016LF05N3	CEER 7.1 Single hose Sold under 3 brands	5,300SACC, up to 150 sq ft	150 sq ft	7.1	Single hose	No	3	Check price on Amazon
6		MountmanMM-HY10MAC002	CEER 7.2 Single hose	6,250SACC, up to 250 sq ft	250 sq ft	7.2	Single hose	No	1
7		MountmanMM-OL-A016LF06N3	CEER 7.2 Single hose	6,250SACC, up to 250 sq ft	250 sq ft	7.2	Single hose	No	1
8		MountmanHY08MAC002	CEER 7.1 Single hose Sold under 2 brands	5,300SACC, up to 150 sq ft	150 sq ft	7.1	Single hose	No	2
9		MountmanMM-HY08MAC002	CEER 7.1 Single hose	5,300SACC, up to 150 sq ft	150 sq ft	7.1	Single hose	No	1
10		MountmanMM-OL-A016LF05N3	CEER 7.1 Single hose	5,300SACC, up to 150 sq ft	150 sq ft	7.1	Single hose	No	1

Dehumidifiers

8 Mountman dehumidifiers, listed models first. DOE data as of 2026-11-03.

#	Photo	Model	Labels	Pints/day (2019 test)	IEF, L/kWh	DOE class	Brands	Amazon
1		MountmanHY9DE003filed as KEGIAN HY9DE003	IEF 1.92 Sold under 3 brands	9pints/day, 2019 DOE test	1.92	up to 25	3	Check price on Amazon
2		MountmanHY9DE003-Wfiled as KEGIAN HY9DE003-W	IEF 1.92 Sold under 3 brands	9pints/day, 2019 DOE test	1.92	up to 25	3	Check price on Amazon
3		MountmanOL09-D031GGN2B1/Efiled as KEGIAN OL09-D031GGN2B1/E	IEF 1.92 Sold under 3 brands	9pints/day, 2019 DOE test	1.92	up to 25	3	Check price on Amazon
4		MountmanMM-HY9DE003	IEF 1.92	9pints/day, 2019 DOE test	1.92	up to 25	1
5		MountmanMM-HY9DE003-W	IEF 1.92	9pints/day, 2019 DOE test	1.92	up to 25	1
6		MountmanMM-OL09-D031GGN2B1/E	IEF 1.92	9pints/day, 2019 DOE test	1.92	up to 25	1
7		MountmanMM-OL09-D031GGN2B1/FE	IEF 1.92	9pints/day, 2019 DOE test	1.92	up to 25	1
8		MountmanOL09-D031GGN2B1/FEfiled as KEGIAN OL09-D031GGN2B1/FE	IEF 1.92 Sold under 3 brands	9pints/day, 2019 DOE test	1.92	up to 25	3

How efficient are Mountman models?

Portable air conditioners

Of the 10 Mountman portable ACs, 1 files a higher CEER than the class median and 9 fall below it.

Dehumidifiers

Of the 8 Mountman dehumidifiers, 8 file a higher IEF than the class median.

A higher CEER means more cooling per watt. A higher IEF means more water removed per kWh.

Who makes Mountman portable ACs and dehumidifiers?

DOE's database has no manufacturer field, so the evidence is whose model number each unit is filed under and which other brands file the same unit.

Mountman shares 10 units with 27 other brands. Its other 8 basic models are filed by Mountman alone. Brands it shares with, and how many units each:

• Uthfy10
• KEGIAN6
• AKIRES2
• Landeagle2
• MEPTY2
• SUNGDOGIN2
• vevor2
• AIR CHOICE1
• Antarctic Star1
• Auseo1
• AZ outdoor1
• COWSAR1
• Electactic1
• Fornido1
• Havato1
• Joy Pebble1
• Kismile1
• KISSAIR1
• KNDKO1
• LIFEPLUS1
• NINGPU1
• R.W.FLAME1
• TMWING1
• TMYICE1

How much do Mountman models cost to run?

While cooling, Mountman portable ACs draw about 746 to 1,291 W (certified SACC divided by CEER). That's 14¢ to 23¢ an hour, or $32.53 to $56.27 for 30 days at 8 hours a day. The lowest is Mountman HY08MAC002 (5,300 BTU/h SACC, CEER 7.1) and the highest Mountman HYMAC14CD1 (10,200 BTU/h SACC, CEER 7.9).

Running nonstop at DOE's test conditions, the 8 Mountman dehumidifiers with both figures use 2.22 to 2.22 kWh a day. That's about 40¢ to 40¢ a day, or $12.08 to $12.08 for 30 days.

Real use cycles on and off with the humidity, so the dehumidifier figures are the upper end for a day of nonstop running.

At 18.16¢ per kWh, the US average residential price for August 2026 (EIA Electric Power Monthly, table 5.6.A). Worked out from the certified figures.

Questions about Mountman

Is Mountman a good dehumidifier brand?

How its 8 dehumidifiers compare on efficiency with their DOE class is above. 4 of them are the same unit as another brand's model. We don't test reliability, noise or build quality, so we can't rank brands on those. How we compare models.

Does Mountman make a 50 pint dehumidifier?

No current DOE record shows one as of 2026-11-03. Its largest, Mountman HY9DE003, certifies 9 pints/day under the 2019 DOE test. Boxes that quote the older 80°F test read higher for the same unit. How the 2019 test changed pint ratings.

Which Mountman dehumidifier is the most efficient for its size?

Mountman HY9DE003, Mountman HY9DE003-W, Mountman MM-HY9DE003 and 5 more tie at IEF 1.92: higher than 237 of the 253 in its DOE class (portable dehumidifiers up to 25 pints/day).

Is Mountman the same as Uthfy?

For 10 units, yes: both file them under the same DOE basic model (HY08MAC002, HY10MAC002, NPH-10H/X1E, NPL-06C/X1E and 6 more). The other 8 Mountman basic models aren't filed by Uthfy.