Are Dehumidifiers Expensive to Run?

Dehumidifiers are incredibly useful devices that help maintain a healthy indoor environment by removing excess moisture from the air. Whether it’s to reduce humidity in a damp basement or improve air quality for asthma sufferers, these appliances are a popular choice for many homes and businesses. However, one common concern that potential buyers often have is: are dehumidifiers expensive to run?

In this article, we will break down the costs associated with running a dehumidifier, how it impacts your energy bill, and ways you can optimize its use to keep costs low. By the end, you’ll have a clearer understanding of how running a dehumidifier fits into your budget and how to get the most out of this handy device.

Why Are People Concerned About the Running Costs of Dehumidifiers?

Before diving into the specifics of energy consumption, let’s first explore why many people worry about the running costs of a dehumidifier. The two main concerns people have are:

• High Electricity Costs: Dehumidifiers are perceived as energy-hungry devices, which could potentially increase monthly electricity bills.

• Frequency of Use: Some may need to run their dehumidifiers regularly due to persistent damp conditions or high humidity levels.

These concerns are valid, especially considering the cost of electricity in the UK, which can make running a constant appliance feel like an expensive proposition. In fact, many homeowners often hesitate to buy a dehumidifier because they are uncertain about how much it will cost to operate.

How Do Dehumidifiers Work and How Does It Impact Energy Consumption?

To understand the costs, it’s important to know how dehumidifiers work. They remove moisture from the air by using one of two methods: refrigerant-based (compressor) dehumidifiers or desiccant dehumidifiers.

• Refrigerant-based dehumidifiers: These models work by cooling the air and causing moisture to condense into water. The process is similar to air conditioning, and as a result, these units tend to consume more electricity.

• Desiccant dehumidifiers: These use materials like silica gel to absorb moisture. While they are often less power-hungry than compressor models, they may not be as effective in extremely damp conditions.

The power consumption of a dehumidifier is influenced by the size of the space (larger rooms require more energy) and the humidity levels (higher humidity will require more dehumidification). Temperature and airflow also play a role in energy usage.

Dehumidifier Running Costs: How Much Energy Do They Use?

Now, let’s break down the actual energy consumption and cost of running a dehumidifier.

On average, a compressor-based dehumidifier consumes between 300 to 700 watts per hour, while a desiccant dehumidifier uses about 200 to 300 watts per hour. If you run a dehumidifier for about 8 hours a day, here’s how the costs add up:

• Compressor Dehumidifier: 700 watts x 8 hours = 5.6 kWh per day. With an average UK electricity rate of £0.28 per kWh, it costs £1.57 per day to run.

• Desiccant Dehumidifier: 300 watts x 8 hours = 2.4 kWh per day. This results in a cost of £0.67 per day.

In terms of monthly costs, you’re looking at approximately £47.10 for a compressor dehumidifier and £20.10 for a desiccant dehumidifier if you use it every day.

For comparison, a washing machine uses about 1 kWh per load, and a vacuum cleaner can use up to 1.5 kWh per hour. So, while dehumidifiers consume energy, they are still relatively cost-effective compared to other household appliances.

How to Save Energy While Running Your Dehumidifier

There are several ways you can minimize the running costs of your dehumidifier without sacrificing performance:

• Use a Timer: Many modern dehumidifiers come with a built-in timer. This allows you to run the device during off-peak hours, which can be cheaper. Alternatively, you can set it to run for a few hours a day rather than continuously.

• Use a Hygrostat: Opt for a dehumidifier with a humidistat, which automatically turns off the unit once the desired humidity level is reached. This prevents the unit from running unnecessarily.

• Maintenance: Clean the filters regularly and keep the dehumidifier well-maintained to ensure optimal performance. A dirty filter can cause the unit to work harder, increasing energy consumption.

• Place It in the Right Spot: For maximum efficiency, place your dehumidifier in the centre of the room with plenty of space around it for air to circulate. Avoid placing it next to walls or furniture that could restrict airflow.

Comparing Dehumidifier Running Costs to Other Home Appliances

To put the costs of running a dehumidifier in perspective, let's compare it with the energy consumption of other common household appliances:

• Air Conditioners: An air conditioner typically consumes about 1000 to 1500 watts per hour, which is more than double the energy consumption of a dehumidifier.

• Heaters: A space heater can consume 1500 watts per hour, making it significantly more expensive to run than a dehumidifier.

• Washing Machines: A washing machine uses about 1 kWh per load, making it much less energy-intensive than a dehumidifier.

• Vacuum Cleaners: A vacuum cleaner uses about 1 to 1.5 kWh per hour, which is also higher than a dehumidifier.

Thus, while dehumidifiers do consume energy, they are still a relatively low-cost option compared to other household appliances that are used more frequently or for longer periods.

The Benefits of Dehumidifiers That Make Them Worth the Investment

Despite concerns about running costs, a dehumidifier can actually save you money in the long term. Here’s how:

• Mould and Mildew Prevention: By reducing excess moisture, dehumidifiers help prevent the growth of mould and mildew, which can lead to costly repairs and damage to your home and belongings.

• Improved Air Quality: Dehumidifiers help reduce allergens such as dust mites, mould spores, and pet dander. This can lead to improved respiratory health and reduce medical costs for those with asthma or allergies.

• Preservation of Home and Furniture: Excess moisture can damage furniture, wooden floors, and electronics. A dehumidifier helps preserve the integrity of your home and valuable items.

Conclusion: Are Dehumidifiers Expensive to Run?

In conclusion, dehumidifiers are not as expensive to run as many people think. While they do consume energy, they are generally more energy-efficient than other household appliances like air conditioners and space heaters. By following a few simple tips, such as using a timer, cleaning the filters, and placing the unit in the right spot, you can minimize the running costs even further.

Ultimately, the benefits of owning a dehumidifier — including improved health, reduced risk of mould, and preservation of your home — far outweigh the relatively small costs of operation. If you’re looking for a long-term solution to improve your indoor air quality and protect your property, a dehumidifier is a wise investment.