Model
Rovsun TIWC-08CRD1
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 Rovsun TIWC-08CRD1 cost to run per year?
The Rovsun TIWC-08CRD1 costs about $74 a year to run and sits near the top of the cheapest-to-run leaderboard, rank #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. Once capacity is factored in, it outperforms 85% of the room air conditioner models we track on efficiency, not just on headline running cost. 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 Rovsun RVTIW-08CRD1 at $74/yr runs a little cheaper and the Tcl H8W4KW 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 Rovsun TIWC-08CRD1's $74/yr adds up to roughly $740 in electricity alone, before purchase price or repairs.
Also sold as: Black+Decker BD08NWES.
By the numbers
The Rovsun TIWC-08CRD1 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 Rovsun TIWC-08CRD1 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Rovsun TIWC-08CRD1 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 Rovsun TIWC-08CRD1 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 Rovsun TIWC-08CRD1 uses 38% less energy.
What drives its running cost
At 8000 BTU/hr, the Rovsun TIWC-08CRD1 is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. 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 Rovsun TIWC-08CRD1 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 Rovsun TIWC-08CRD1 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 Rovsun TIWC-08CRD1 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
| Rank | Model | Cost/yr |
|---|---|---|
| 98 | Rovsun RVTIW-08CRD18000 BTU/hr | $74 |
| 97 | Richmond RMV08A10A8000 BTU/hr | $74 |
| 96 | Perfect Aire 1PACV80008000 BTU/hr | $74 |
| 95 | Perfect Aire 1PACU80008000 BTU/hr | $74 |
| 94 | Noma Iq 143-0087-48000 BTU/hr | $74 |
Source
ES_1151028_TIWC-08CRD1_08032024091545_3926965View certified room air conditioner listingsENERGY STAR data as of July 2026Rovsun and TIWC-08CRD1 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.