NEPO: 19 DOE certified models

Key findings

• Highest certified cooling capacity among its portable ACs: NEPO NPN-08C/X1E, NEPO NPN-08C/X1E-W, NEPO NPN-08H/X1E and 7 more tie at 8,000 BTU/h SACC.
• Highest certified cooling capacity among its window ACs: NEPO NCG***-08CI/X1E and NEPO NCG***-08HI/X1E tie at 8,100 BTU/h.
• Most efficient for its class: NEPO NCG***-08CI/X1E, CEER 16.3, higher than 102 of the 105 in its DOE class (window ACs, 8,000 to 13,999 BTU/h).

Portable air conditioners

10 of 16 NEPO 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		NEPONPP-06H/X1E	CEER 6.7 Single hose Sold under 17 brands	6,000SACC, up to 250 sq ft	250 sq ft	6.7	Single hose	No	17	Check price on Amazon
2		NEPONPP-05C/X1E	CEER 6.3 Single hose Sold under 17 brands	5,000SACC, up to 150 sq ft	150 sq ft	6.3	Single hose	No	17	Check price on Amazon
3		NEPONPN-08C/X1Efiled as Antarctic Star NPN-08C/X1E	CEER 7.2 Single hose Sold under 14 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.2	Single hose	No	14
4		NEPONPN-08C/X1E-W	CEER 7.2 Single hose Sold under 2 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.2	Single hose	No	2
5		NEPONPN-08H/X1E	CEER 7.2 Single hose Heat Sold under 2 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.2	Single hose	Yes	2
6		NEPONPN-08H/X1E-W	CEER 7.2 Single hose Sold under 5 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.2	Single hose	No	5
7		NEPONPP-E508CE	CEER 7.3 Single hose	8,000SACC, up to 350 sq ft	350 sq ft	7.3	Single hose	No	1
8		NEPONPP-E508CH	CEER 7.3 Single hose Heat	8,000SACC, up to 350 sq ft	350 sq ft	7.3	Single hose	Yes	1
9		NEPONPQ-08C/X1E	CEER 7.3 Single hose Sold under 2 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.3	Single hose	No	2
10		NEPONPQ-08C/X1E-W	CEER 7.3 Single hose Sold under 2 brands	8,000SACC, up to 350 sq ft	350 sq ft	7.3	Single hose	No	2

Window and room air conditioners

3 NEPO window ACs, listed models first. DOE data as of 2026-11-03.

#	Photo	Model	Labels	Cooling, BTU/h	Covers	CEER	Watts	Type	Heat pump	Brands	Amazon
1		NEPONCG***-08HI/X1Efiled as KISSAIR NCG-08HI/X1E-W	CEER 15.1 Window Heat pump Sold under 8 brands	8,100BTU/h, up to 350 sq ft	350 sq ft	15.1	610	Window	Yes	8	Check price on Amazon
2		NEPONCG***-06CI/X1Efiled as KISSAIR NCG-06CI/X1E-W	CEER 15.1 Window Sold under 8 brands	6,200BTU/h, up to 250 sq ft	250 sq ft	15.1	460	Window	No	8	Check price on Amazon
3		NEPONCG***-08CI/X1Efiled as KISSAIR NCG-08CI/X1E-W	CEER 16.3 Window Sold under 8 brands	8,100BTU/h, up to 350 sq ft	350 sq ft	16.3	610	Window	No	8

How efficient are NEPO models?

Portable air conditioners

Of the 16 NEPO portable ACs, none files a higher CEER than the class median: 6 match it and 10 fall below it.

Window and room air conditioners

Of the 3 NEPO window ACs, 2 file a higher CEER than the class median and 1 matches it.

A higher CEER means more cooling per watt.

Who makes NEPO portable ACs and window ACs?

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.

NEPO shares 17 units with 19 other brands. Its other 2 basic models are filed by NEPO alone. Brands it shares with, and how many units each:

• NINGPU17
• Antarctic Star6
• COWSAR6
• Electactic6
• KISSAIR6
• R.W.FLAME6
• ZAFRO6
• Auseo3
• Fornido3
• Joy Pebble3
• Kismile3
• KNDKO3
• Xbeauty3
• COSTWAY2
• GARVEE2
• WAA2
• AZ outdoor1
• TMWING1
• TMYICE1

How much do NEPO models cost to run?

While cooling, NEPO portable ACs draw about 794 to 1,111 W (certified SACC divided by CEER). That's 14¢ to 20¢ an hour, or $34.59 to $48.43 for 30 days at 8 hours a day. The lowest is NEPO NPP-05C/X1E (5,000 BTU/h SACC, CEER 6.3) and the highest NEPO NPN-08C/X1E (8,000 BTU/h SACC, CEER 7.2).

While cooling, NEPO window ACs draw about 460 to 610 W (DOE's listed power input). That's 8¢ to 11¢ an hour, or $20.05 to $26.59 for 30 days at 8 hours a day. The lowest is NEPO NCG***-06CI/X1E (6,200 BTU/h, CEER 15.1) and the highest NEPO NCG***-08CI/X1E (8,100 BTU/h, CEER 16.3).

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 NEPO

Is NEPO a good portable AC brand?

How its 16 portable ACs compare on efficiency with their DOE class is above. 14 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.

How big a room will a NEPO portable AC cool?

Its models certify 5,000 to 8,000 BTU/h SACC, which ENERGY STAR's sizing chart puts at 150 to 350 sq ft. Every one was tested single hose. SACC and the BTU figure on the box.

Which NEPO portable AC is the most efficient for its size?

NEPO NPP-E508CE, NEPO NPP-E508CH, NEPO NPQ-08C/X1E and 3 more tie at CEER 7.3: higher than 392 of the 1,044 single hose portable ACs certified to DOE. At the other end is NEPO NPP-05C/X1E, at CEER 6.3, higher than 101 of the 1,044 in its class.

Is NEPO the same as NINGPU?

For 17 units, yes: both file them under the same DOE basic model (NPL***-06C/X1E, NPL***-06C/X1E-W, NPL***-06H/X1E, NPL***-06H/X1E-W and 13 more). The other 2 NEPO basic models aren't filed by NINGPU.