Appliances / Dehumidifiers / Keystone
Keystone KSTAD504G
49.74 pints/day · Portable Dehumidifier dehumidifier
Check the price at the store, then add $764 of electricity to get the true cost. We may earn a commission if you buy through these links; as an Amazon Associate we earn from qualifying purchases.
- Price. Check what it costs at the store.
- Plus running cost. Add $764 of electricity over 8 years. That is the part the price tag hides.
- Compare. Pick your state below, then check the cheaper-to-run models of the same size.
About the Keystone KSTAD504G
The Keystone KSTAD504G is a 49.74 pints/day portable dehumidifier dehumidifier certified by ENERGY STAR. Its official test figure is 525 kWh of electricity a year, which at the U.S. average price of 18.19¢ per kWh comes to $95 a year, or $764 over a typical 8-year life.
Among 489 portable dehumidifier models it ranks #441 for running cost. The cheapest model of this type would save $611 in electricity over 8 years, though it may differ in size and features.
If you want the same type and a similar size for less to run, the Aeocky RHEA PRO-RCS50(Y)-N4-3-25 uses 432 kWh a year and would save about $135 over 8 years.
Cost to run where you live
525 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 (45 pints a day and up) model ranked.
| Aeocky RHEA PRO-RCS50(Y)-N4-3-25 | 44.34 pints/day | $79/yr | saves $135 |
| Aeocky LEO PRO-RCS50(Y)-N4-3(B)-25 | 44.94 pints/day | $80/yr | saves $127 |
| Vellgoo TAURUS PRO-RCS50(Y)-N4-3-25 | 45 pints/day | $81/yr | saves $118 |
| Waykar CTH150B | 49.43 pints/day | $86/yr | saves $79 |
Specs
| Brand | Keystone |
| Model | KSTAD504G |
| Type | Portable Dehumidifier |
| Energy use | 525 kWh / year |
| Size | 49.74 pints/day |
| Water removed | 49.74 pints/day |
| Efficiency (IEF) | 2.01 L/kWh |
| Refrigerant | HFC-32 |
| Most efficient | No |
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.
Questions people ask
How much does the Keystone KSTAD504G cost to run?
About $95 a year at the U.S. average electricity price (18.19¢/kWh), based on its ENERGY STAR rating of 525 kWh a year. In a state with expensive power it can be much more; pick your state on this page to see your number.
How much will the Keystone KSTAD504G cost in electricity over its life?
About $764 over 8 years, a typical life for a dehumidifier. Add that to the price you pay to get the true cost to own.
Is the Keystone KSTAD504G energy efficient?
It is ENERGY STAR certified, which means it meets the EPA's efficiency requirements for its type.
Is there a cheaper dehumidifier to run of the same type and size?
Yes. The Aeocky RHEA PRO-RCS50(Y)-N4-3-25 uses 432 kWh a year, about $135 less in electricity over 8 years.
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