Model
Black+Decker BD12NWES
Rank #231 means 230 of the 404 room air conditioner models we track cost less to run each year; the 43rd efficiency percentile means it uses less energy for its size than 43% of those models.
What does the Black+Decker BD12NWES cost to run per year?
The Black+Decker BD12NWES holds rank #231 of 404 on running cost, at about $111 a year, an unremarkable but typical figure for the class. It uses 38% less energy than the U.S. federal standard model in its class, which would cost about $180/yr to run, a saving of roughly $69 a year. Its size-adjusted efficiency percentile of 43 lands in the middle of the pack once capacity is accounted for. At a CEER of 15, its combined energy efficiency ratio is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the K�Hl+ KHVS12B33B at $111/yr runs a little cheaper and the Century RXTS-121A at $111/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 BD12NWES's $111/yr adds up to roughly $1110 in electricity alone, before purchase price or repairs.
Also sold as: Century RXTS-121A, Comfort Aire RXTS-121A, Danby DAC120ECBIWDB, Della 048-TL-W12KI, Element EHWR12BE, Friedrich CCV12A10A, Frigidaire FHWW125WE1, Frigidaire Gallery GHWQ123WC1, Frigidaire Gallery GHWQ125WD1, Frigidaire Gallery GHWW125TE1, Ge Profile PWDV12W**#, Hisense AAW12TW26, Hisense 143-1306-8, Hisense LWCT12W25A, Hisense AWL1225TW1W, Hisense AHLW1225TW1W, Hisense WAWL1225TW1W, Hykolity ACB-2603, Hykolity ACB-2623, Insignia NS-AC12WWH5-C, Keplerx KARC12RSVE1, Keystone KSTAW121WA, Keystone KSTAW12INV, Ktaxon TIWC-12CRD1, Ktaxon KXTIW-12CRD1, Lg LW1222IVSM, Lg LW1224IVSM, Midea 1014634874, Midea MAW12V1QWT, Midea MAW12V1UWT, Midea MAW12W1QWT, Midea MAW12AV1QWT, Midea MAW12RV1CWT, Midea MAW12S1VWT-A, Midea MAW12V1QWT-M, Midea MAW12V1QWT-S, Midea MAW12V1YWT-S, Midea MAW12AV1QWT-C, Midea MAW12AV1UWT-C, Midea MAW12S1VWWT-T, Midea MW12MSWBA5RCM, Midea MW12MSWBA6RCM, Midea MWAUQB-12CRFN8-BCN10, Midea MWCUWA-12CRFN8-BCN10, Omni Max OWH121CV4A, Perfect Aire 1PACU12000, Perfect Aire 1PACV12000, Philodeco PIWC-12CRD1(ES), Richmond RMV12A10A, Rovsun TIWC-12CRD1, Rovsun RVTIW-12CRD1, Tcl H12W4KW, Tcl H12W4MW, Tcl T12WQ2S, Tcl H12W4KW-CA, Vissani VWL1225T, Vissani VAWA12V4HWT, Whirlpool WHAW-121IN, Zokop TIWC-12CRD1.
By the numbers
The Black+Decker BD12NWES 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 $111/yr, here is what the Black+Decker BD12NWES 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 BD12NWES costs about $1110. That is roughly $690 less than a standard model in its class, which would run closer to $1800 over the same ten years.
How the Black+Decker BD12NWES compares
The room air conditioner class we track runs from $51 to $389 a year. At $111/yr, it runs about $12 a year above the class median of $99, and it is about $60 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $180/yr, the Black+Decker BD12NWES uses 38% less energy.
What drives its running cost
At 12000 BTU/hr, the Black+Decker BD12NWES is a mid-size room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, putting it squarely in the middle of the class on the size lever that drives most of the cost. 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). Two units with the same BTU rating can post very different running costs, and CEER is the figure that explains most of that gap.
- BTU cooling capacity. BTU rating scales with room size, and it is usually the first driver of an air conditioner's running cost, ahead of its CEER figure.
- Thermostat and mode usage. How the unit is actually operated, thermostat cycling versus a fixed setting, moves real electricity use more than the rated BTU or CEER figure alone.
Common questions
Is the Black+Decker BD12NWES cheap to run?
Roughly, yes. Its $111/yr figure is close to the class median, ranking #231 of 404, neither a bargain nor a splurge on running cost.
How much does the Black+Decker BD12NWES cost per month?
About $9.28 a month, which is the $111 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 600 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $111 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Black+Decker BD12NWES for its size?
43rd percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_1126481_BD12NWES_01292024115535_80198615View certified room air conditioner listingsENERGY STAR data as of July 2026Black+Decker and BD12NWES 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.