Are Dehumidifiers Expensive to Run?

With rising living costs and soaring energy prices, it's no surprise that people are wondering just how much running a dehumidifier could add to their bills. In this piece, we'll break down the operational costs based on the latest OFGEM energy price cap (October 2024). By the end, you'll have a clear picture of whether these devices will significantly impact your energy expenses or if they're actually a smart move in the long run.

Link to How Much Power Does a Dehumidifier Use?How Much Power Does a Dehumidifier Use?

The electricity a dehumidifier uses depends on its size, type, and added features. On average, they can pull anywhere from 20 to 500 watts, depending on their efficiency and capacity. For instance, smaller models might only use 20–100 watts, while larger, more powerful units can go up to 500 watts.

To figure out the cost of running one, you’ll need to know its wattage, how long you plan to run it daily, how often, and the cost of electricity. Let's use the North West region's rates under the OFGEM energy price cap for October to December 2024, assuming you're on a Direct Debit Single Rate tariff.

Link to Example Calculation:Example Calculation:

• Dehumidifier Wattage: 300 watts
• Usage Time: 10 hours per day
• Unit Price: 25.01 pence per kWh (£0.2501 per kWh)
• Standing Charge: 52.04 pence per day (£0.5204 per day)

Daily Power Consumption:

• Convert wattage to kilowatts (kW): 300 watts ÷ 1,000 = 0.3 kW
• Calculate daily energy usage: 0.3 kW × 10 hours = 3 kWh

Energy Cost:

• Calculate daily energy cost: 3 kWh × £0.2501 per kWh = £0.75

Total Daily Cost (including standing charge):

• Add standing charge to energy cost: £0.75 (energy cost) + £0.5204 (standing charge) = £1.27

Monthly Cost (over 30 days):

• Multiply daily cost by 30 days: £1.27 × 30 = £38.10

Of course, real-world usage may vary based on personal habits, room humidity, and insulation quality.

Link to Comparing Costs: Refrigerant vs. Desiccant DehumidifiersComparing Costs: Refrigerant vs. Desiccant Dehumidifiers

Your energy costs also depend on the type of dehumidifier you use. There are two main kinds: refrigerant (compressor) and desiccant. Both consume energy differently, impacting your overall costs:

• Refrigerant Dehumidifiers: These tend to be more energy-efficient in warmer spaces (above 15°C), working by condensing moisture from warm air onto cold coils.

  Example: A Meaco ABC 12L uses around 160 watts, costing about £1.48 per day to run continuously, including the standing charge.

• Desiccant Dehumidifiers: These models work better in colder environments (below 15°C) but use more power due to the heating element needed to dry out the desiccant material.

  Example: The *EcoAir DD1 uses around 300 watts, which would cost about £2.32 per day for continuous use. The upside? They also provide some heat, which can offset heating costs in cold rooms.

Link to Real-Life Running Costs of Popular ModelsReal-Life Running Costs of Popular Models

Here are the estimated running costs for some popular dehumidifiers in the UK, based on the current OFGEM price cap rates for the North West region, Direct Debit Single Rate tariff:

As you can see, the running costs vary widely, with desiccant dehumidifiers generally being more expensive to run. However, in colder spaces, their added warmth might make the extra cost worthwhile.

Note: All calculations have been updated to reflect the latest OFGEM energy price cap figures for October to December 2024, based on the North West region, Direct Debit Single Rate tariff. The unit rates and standing charges vary by region, meter type, and rate type, so the figures used here are specific to the North West region.

Link to Tips to Lower Your Dehumidifier Running CostsTips to Lower Your Dehumidifier Running Costs

Dehumidifiers can be essential, especially in damp or cold homes, but there are ways to keep their running costs in check:

1. Pick the Right Type Choose a model that suits your environment. Desiccant dehumidifiers work better in cooler spaces but use more energy, while refrigerant models are more efficient in warmer settings.

2. Look for Energy-Efficient Models Investing in an energy-efficient dehumidifier can save you money over time. For instance, the Meaco 12L Low Energy uses just 157 watts, costing around £1.46 per day to run continuously, including standing charge, which breaks down to about 3.8p per hour (energy cost only).

3. Use Timers and Humidistats Many dehumidifiers come with built-in humidistats, turning the unit off when the air reaches a set humidity level. Timers are another good option for ensuring the device runs only when necessary.

4. Proper Placement Position your dehumidifier in the most humid area and make sure windows and doors are closed to keep moisture out. Regularly cleaning the filters also helps the unit run efficiently.

5. Utilise Off-Peak Electricity Rates If your energy provider offers cheaper rates at night, running your dehumidifier during these hours can help lower costs. Even though the price cap sets maximum rates, some suppliers may offer off-peak tariffs with lower prices.

Link to Heating Cost SavingsHeating Cost Savings

One unexpected benefit of using a dehumidifier is the potential to lower your heating bill. Humid air feels colder than dry air at the same temperature, often leading people to crank up the heat. By reducing humidity, dehumidifiers can help maintain a warmer feeling, allowing you to lower the thermostat by a degree or two—potentially saving money on heating costs. Plus, desiccant models add a little warmth, which can be especially useful during colder months.

Link to Is It Worth It?Is It Worth It?

The decision depends on a few factors: the type of dehumidifier, how often you use it, and your environment. While the running costs might add up under current energy prices, the benefits—like improved air quality, reduced mould risk, and potential heating savings—often make dehumidifiers a sound investment.

For homes dealing with persistent dampness or mould, the modest increase in electricity costs is a small price to pay for a healthier and more comfortable living space. The key is choosing the right model and using it wisely to ensure the benefits far outweigh the costs.

Link to Final ThoughtsFinal Thoughts

Understanding the running costs of a dehumidifier helps you make an informed decision about purchasing and using one. By considering factors like wattage, usage time, energy tariffs, and regional rates, you can accurately estimate how much it will add to your energy bills.

While the upfront costs can be expensive, the long-term benefits of improved air quality and potential savings on heating can make a dehumidifier a worthwhile investment.

If you have any further questions or need assistance with the calculator, feel free to reach out.