Appliances / Window air conditioners / Wallmaster
Wallmaster WCVT12B30B: $116 a year to run
This room air conditioner uses 637 kWh of electricity a year. At the U.S. average price that is $116 a year and $1,159 over a typical 10-year life. It ranks #28 of 58 through the wall models for running cost.
- Price. Check what it costs at the store (links below).
- Plus running cost. Add $1,159 of electricity over 10 years. That is the part the price tag hides.
- Compare. Pick your state to see your real number, then check the cheaper-to-run models of the same size.
Where to buy
Compare the price, then add the running cost below to get the true cost.
Cost to run where you live
637 kWh a year (ENERGY STAR test figure) × 18.19¢ per kWh, the average residential price in the U.S. for Jan–Aug 2026 (EIA). Your bill depends on your utility and how you use it.
Cheaper to run, same type and size
Or see every large rooms (over 10,000 to 15,000 btu) model ranked.
| Friedrich WCVT10B10B | 10100 BTU | $97/yr | saves $187 |
| Friedrich WCVT12B10B | 11200 BTU | $108/yr | saves $75 |
| Friedrich WCVT10B10A | 11000 BTU | $116/yr | saves $4 |
Specs
| Brand | Wallmaster |
| Model | WCVT12B30B |
| Type | Through the Wall |
| Energy use | 637 kWh / year |
| Federal maximum for this type | 1179 kWh / year |
| Width | 26.5 in |
Specs and energy use from the ENERGY STAR certified products list (U.S. EPA). An asterisk in a model number stands for colour or finish codes. HouseholdLeak is not affiliated with ENERGY STAR or the EPA.
Want the cheapest picks every week?
Join the free Leak Club. One short email with the lowest-cost picks we found.