Model
Gasbye DryPrime-50-B
Rank #451 means 450 of the 519 dehumidifier models we track cost less to run each year; the 52nd efficiency percentile means it uses less energy for its size than 52% of those models.
What does the Gasbye DryPrime-50-B cost to run per year?
The Gasbye DryPrime-50-B costs about $97 a year to run, well up the cost table for its class at rank #451 of 519. Size-adjusted, this model sits close to the class median on efficiency, ahead of 52% of dehumidifier models we track. At a IEF of 2.01, its integrated energy factor is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the Perfect Aire 4PFDP50 at $97/yr runs a little cheaper and the Gasbye DryPrime-50-W at $97/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A dehumidifier typically stays in service for somewhere around 8 years; over that span, the Gasbye DryPrime-50-B's $97/yr adds up to roughly $776 in electricity alone, before purchase price or repairs.
Also sold as: Duracomfort DH50PWB.
By the numbers
The Gasbye DryPrime-50-B 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 $97/yr, here is what the Gasbye DryPrime-50-B adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Gasbye DryPrime-50-B costs about $970. That is roughly $330 more than the class median, which would run closer to $640 over the same ten years.
How the Gasbye DryPrime-50-B compares
The dehumidifier class we track runs from $19 to $521 a year. At $97/yr, it runs about $33 a year above the class median of $64, and it is about $78 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 49.7 pints/day, the Gasbye DryPrime-50-B is a large dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, size is usually the single biggest lever behind a running-cost figure, and at this end of the range there is more capacity to service, which tends to push the number up. Beyond size, its IEF of 2.01, above the class median of 2.01, is the class's own efficiency yardstick, integrated energy factor, and it is what separates two similarly sized models with different running costs.
- Integrated Energy Factor (IEF). IEF measures liters of water removed per kilowatt-hour; a higher IEF means less energy per pint of moisture removed for a given capacity.
- Water removal capacity (pints/day). A dehumidifier rated to remove more pints per day is built for a larger space or a more humid room, and generally draws more power to do it.
- Humidistat accuracy. A unit with a more precise humidistat cycles the compressor off once the target humidity is reached, rather than running continuously.
Common questions
Is the Gasbye DryPrime-50-B cheap to run?
Its $97/yr running cost, rank #451 of 519, is above what most dehumidifier models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Gasbye DryPrime-50-B cost per month?
About $8.12 a month, which is the $97 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: 525 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $97 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Gasbye DryPrime-50-B for its size?
52nd 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
Source
ES_1150040_DryPrime-50-B_022620240510157_8702723View certified dehumidifier listingsENERGY STAR data as of July 2026Gasbye and DryPrime-50-B 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.