Model
Tcl H15W4KW
Rank #345 means 344 of the 404 room air conditioner models we track cost less to run each year; the 17th efficiency percentile means it uses less energy for its size than 17% of those models.
What does the Tcl H15W4KW cost to run per year?
Among the 404 room air conditioner models we track, the Tcl H15W4KW's $145/yr running cost ranks it #345, in the pricier fifth of the class. It uses 35% less energy than the U.S. federal standard model in its class, which would cost about $223/yr to run, a saving of roughly $78 a year. Its size-adjusted efficiency percentile of 17 means the low running cost, where it exists, is driven almost entirely by capacity rather than efficiency. The CEER figure of 14.4 on this model captures combined energy efficiency ratio, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Friedrich CCV15A10A at $145/yr runs a little cheaper and the Tcl H15W4KW-CA at $145/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 Tcl H15W4KW's $145/yr adds up to roughly $1450 in electricity alone, before purchase price or repairs.
Also sold as: Friedrich CCV15A10A.
By the numbers
The Tcl H15W4KW 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 $145/yr, here is what the Tcl H15W4KW adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Tcl H15W4KW costs about $1450. That is roughly $780 less than a standard model in its class, which would run closer to $2230 over the same ten years.
How the Tcl H15W4KW compares
The room air conditioner class we track runs from $51 to $389 a year. At $145/yr, it runs about $46 a year above the class median of $99, and it is about $94 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $223/yr, the Tcl H15W4KW uses 35% less energy.
What drives its running cost
At 15000 BTU/hr, the Tcl H15W4KW is a large room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, and larger room air conditioner models generally cost more to run than smaller ones in the same class, simply because there is more to keep cold, spin, heat, or light. Beyond size, its CEER of 14.4, below 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 Tcl H15W4KW cheap to run?
Its $145/yr running cost, rank #345 of 404, is above what most room air conditioner models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Tcl H15W4KW cost per month?
About $12.08 a month, which is the $145 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: 781 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $145 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Tcl H15W4KW for its size?
17th percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
Source
ES_1126578_H15W4KW_12102024105744_80172671View certified room air conditioner listingsENERGY STAR data as of July 2026Tcl and H15W4KW 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.