Model
Black+Decker BD08NWES
Rank #51 means 50 of the 404 room air conditioner models we track cost less to run each year; the 85th efficiency percentile means it uses less energy for its size than 85% of those models.
What does the Black+Decker BD08NWES cost to run per year?
At $74 a year to run, the Black+Decker BD08NWES is among the cheapest room air conditioner models we track, ranking #51 of 404. It uses 38% less energy than the U.S. federal standard model in its class, which would cost about $120/yr to run, a saving of roughly $46 a year. Efficiency-wise, once capacity is accounted for, it beats 85% of the class, a solidly strong result rather than a size-driven fluke. Its CEER of 15 reflects combined energy efficiency ratio, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Midea MWAUQB-08HRFN8-BCN11 at $74/yr runs a little cheaper and the Century RXTS-81A at $74/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A room air conditioner typically stays in service for somewhere around 10 years; over that span, the Black+Decker BD08NWES's $74/yr adds up to roughly $740 in electricity alone, before purchase price or repairs.
Also sold as: Century RXTS-81A, Comfort Aire RXTS-81A, Danby DAC080EBIBDB, Danby DAC080B7IWDB-6, Danby DAC080B8IWDB-6, Della 048-TL-W8KI, Element EHWR08BE, Friedrich CCV08A10A, Frigidaire FHWW085WE1, Frigidaire Gallery GHWQ083WC1, Frigidaire Gallery GHWQ085WD1, Frigidaire Gallery GHWW085TE1, Ge Profile PWDV08W**#, Hisense AALW08TW26, Hisense HLAW0825TW, Hisense AHW0823TW1W, Hisense AWL0826TW1W, Honeywell HAC-8I, Hykolity ACB-2601, Hykolity ACB-2621, Keplerx KARC8RSVE1, Keystone KSTAW081WA, Keystone KSTAW08INV, Ktaxon TIWC-08CRD1, Ktaxon KXTIW-08CRD1, Midea MAW08V1QWT, Midea MAW08V1UWT, Midea MAW08W1QWT, Midea MAW08AV1QWT, Midea MAW08RV1CWT, Midea MAW08S1VWT-A, Midea MAW08V1QWT-S, Midea MAW08V1QWT-T, Midea MAW08V1YWT-S, Midea MAW08W1QWT-T, Midea MAW08AV1QWT-C, Midea MAW08S1VWWT-T, Midea MW08MSWBA1RCM, Midea MW08MSWBA5RCM, Midea MWAUQB-08CRFN8-BCN10, Midea MWCUWA-08CRFN8-BCN10, Noma 043-8814-4, Noma Iq 143-0087-4, Perfect Aire 1PACU8000, Perfect Aire 1PACV8000, Richmond RMV08A10A, Rovsun TIWC-08CRD1, Rovsun RVTIW-08CRD1, Tcl H8W4KW, Tcl H8W4MW, Tcl T08WQ2S, Tcl H8W4KW-CA, Whirlpool WHAW-081IN, Windmill 08W2Wi, Zokop TIWC-08CRD1.
By the numbers
The Black+Decker BD08NWES normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $74/yr, here is what the Black+Decker BD08NWES adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Black+Decker BD08NWES costs about $740. That is roughly $460 less than a standard model in its class, which would run closer to $1200 over the same ten years.
How the Black+Decker BD08NWES compares
The room air conditioner class we track runs from $51 to $389 a year. At $74/yr, it runs about $25 a year cheaper than the class median of $99, and it is about $23 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $120/yr, the Black+Decker BD08NWES uses 38% less energy.
What drives its running cost
At 8000 BTU/hr, the Black+Decker BD08NWES is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture. Beyond size, its CEER of 15, above the class median of 15, is the class's own efficiency yardstick, combined energy efficiency ratio, and it is what separates two similarly sized models with different running costs.
- Combined Energy Efficiency Ratio (CEER). CEER captures cooling output per watt, including standby power; a higher CEER means less electricity for the same BTU of cooling.
- BTU cooling capacity. A higher-BTU unit is sized for a bigger room and generally uses more electricity per hour of operation than a smaller unit, regardless of efficiency.
- Thermostat and mode usage. Running on a fixed low temperature around the clock uses far more energy than using a thermostat setting, eco mode, or a timer to match cooling to when the room is actually occupied.
Common questions
Is the Black+Decker BD08NWES cheap to run?
Yes, relatively. At $74 a year it ranks #51 of 404 room air conditioner models we track, in the cheaper part of its class to run.
How much does the Black+Decker BD08NWES cost per month?
Roughly $6.19/mo, spreading the $74/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 400 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $74 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Black+Decker BD08NWES for its size?
85th percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
Source
ES_1126481_BD08NWES_01292024115535_80198615View certified room air conditioner listingsENERGY STAR data as of July 2026Black+Decker and BD08NWES are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.