The annual running cost of a ventilation fan at trickle rate in the UK typically ranges from £5 to £15 per unit, depending on wattage and energy prices. For example, VENTI’s FLUXO 100 model consumes 1.2W–2.6W, costing roughly £5/year at 24p/kWh. Continuous operation balances energy efficiency with air quality improvements, making modern systems a cost-effective solution for damp prevention.

Breaking Down Ventilation Fan Running Costs

Understanding the operational expenses of trickle ventilation requires analysing three key factors: power consumption, energy tariffs, and usage patterns. Here’s how these elements interact in real-world scenarios:

1. Power Consumption: The Core Metric

Ventilation fans like VENTI’s FLUXO and ARIA models operate at low wattages during trickle mode:

• FLUXO 100: 1.2W (minimum) to 2.6W (maximum).
• ARIA DMEV: 1.0W (trickle) to 5.8W (boost).

At trickle rates, these systems prioritise energy efficiency while maintaining airflow. For perspective:

• Hourly consumption: 1.2W = 0.0012 kWh.
• Daily cost: 0.0012 kWh × 24h = 0.0288 kWh × 24p/kWh = £0.007.
• Annual cost: £0.007 × 365 = £2.55.

However, VENTI’s stated £5/year figure accounts for real-world variables, such as occasional boosts in airflow or regional tariff fluctuations.

2. Energy Tariffs: The Price of Power

As of 2023, UK electricity prices average 24–34p per kWh, influenced by:

• Geographic location (e.g., higher costs in Southern England).
• Energy supplier tariffs (variable vs. fixed rates).
• Government levies (e.g., VAT, green taxes).

Using the FLUXO 100’s 1.7W average consumption:

• Annual energy use: 1.7W × 24h × 365 = 14.9 kWh.
• Cost: 14.9 kWh × 24p = £3.58.

This aligns with VENTI’s estimates when factoring in minor load variations.

3. Comparative Analysis: Trickle Vents vs. Mechanical Systems

While traditional trickle vents incur zero energy costs, they often lead to:

• Heat loss: Uncontrolled airflow increases heating demands.
• Mould risk: Inconsistent ventilation fails to manage humidity.

In contrast, mechanical systems like FLUXO recover 82% of heat and reduce annual heating costs by £100–£300 in poorly insulated homes.

Why Modern Ventilation Pays for Itself

1. Health Savings: Mitigating damp and mould prevents respiratory issues, reducing NHS expenses (estimated £1.4 billion/year in mould-related treatments).
2. Energy Efficiency: FLUXO’s heat recovery offsets its £5–£15 running cost by slashing heating bills.
3. Regulatory Compliance: Building Regulations Part F mandates “adequate ventilation” – achievable cost-effectively via certified systems.

Upgrade to VENTI’s FLUXO or ARIA systems for annual running costs under £15 and transform your home into a healthier, energy-efficient space – request a free consultation today.