Extractor Fan Running Cost Calculator
Instantly calculate the daily, monthly, and yearly electricity costs of your bathroom or kitchen extractor fan based on wattage and usage.
Calculate Your Fan Running Cost
Enter your extractor fan’s wattage, daily usage hours, and your electricity rate to get an instant, precise breakdown of your ventilation energy costs.
Cost Calculator
Enter your fan details to see the energy cost breakdown
Check the fan label or manual (typically 10W–30W)
Include timer overrun or continuous trickle settings
Average UK rate is ~24p/kWh. Check your latest energy bill for your exact rate.
Estimated Running Cost
Based on your input parameters
Typical Extractor Fan Cost Examples
Estimated yearly running costs for common extractor fan types, assuming an electricity rate of 24p per kWh.
| Fan Type | Average Wattage | Usage Pattern | Estimated Yearly Cost |
|---|---|---|---|
| Standard Bathroom Fan (Timer) | 15W | 2 hours / day | £3.29 |
| Continuous Run Fan (Trickle) | 5W | 24 hours / day | £10.51 |
| High-Performance Kitchen Fan | 30W | 3 hours / day | £9.86 |
| MEV (Mechanical Extract Ventilation) | 20W | 24 hours / day | £42.05 |
| Old/Inefficient Noisy Fan | 40W | 4 hours / day | £14.02 |
Extractor Fan Energy FAQ
Everything you need to know about extractor fan electricity usage and how to keep ventilation costs low.
The cost depends on the fan’s wattage, how long it runs, and your electricity rate. For example, a 15W fan running for 2 hours a day at 24p per kWh costs approximately £0.01 per day, £0.30 per month, or £3.29 per year.
Most standard bathroom extractor fans consume between 10W and 30W of power. High-performance or continuous-run mechanical ventilation (MEV) fans may use between 15W and 50W, while modern DC motor fans can run on as little as 3W to 8W on their low setting.
Not necessarily. Modern continuous-run extractor fans are designed to be highly energy-efficient. Running a 5W fan 24/7 at 24p/kWh costs only about £10.50 per year, which is a small price to pay for preventing costly damp and mould damage in your home.
To reduce costs, ensure your fan has a humidity sensor or timer so it only runs when needed. Regularly clean the fan grille and blades to maintain airflow efficiency, and consider upgrading to a modern, energy-efficient DC motor fan if your current model is old, noisy, or lacks a trickle/boost setting.