How Much Does a PIV System Cost to Run?
It's sensible to ask about running costs before fitting something that operates in the background all day and is connected to your mains electricity. The answer depends on whether you're looking at the fan alone or a heated PIV system.
At ClearAIR, we like to provide a comprehensive service and manage expectations before we advise on a suitable loft-mounted domestic PIV installation. Here's what to expect from your energy bills after a PIV installation
The Fan and the Heater Are Different Costs
The fan in a PIV unit is designed for continuous low-energy operation. A heated model uses additional electricity when the heater comes on.
We can check the details of your property before confirming any installation extras. That way the quote reflects the actual job, not just a headline figure.
Why There Isn't One Universal Figure
Different models, fan settings, outdoor temperatures and electricity tariffs change the bill. A single quoted annual cost without assumptions can be misleading.
The fan's continuous operation is different from the heater switching on and off in colder conditions..
How to Work It Out
Take the unit's power consumption in kilowatts, multiply by the hours it operates and then by your electricity unit rate. For heated systems, calculate the heater separately using realistic operating hours.
You can calculate an estimate from the wattage and tariff without relying on a generic internet figure..
Is It Cheaper Than a Dehumidifier?
They do different jobs. A dehumidifier collects moisture from air in a room, while PIV provides ventilation across the home. Compare actual electricity use and what problem you're trying to solve.
The heater's duty cycle makes the biggest difference between heated and non-heated running costs..
How to Keep Costs Sensible
Choose a suitable model, have it commissioned correctly and keep up with filter maintenance. Avoid switching it on and off simply to save pennies if that undermines continuous ventilation.
We can check the details of your property before confirming any installation extras. That way the quote reflects the actual job, not just a headline figure.
Speak to ClearAIR
If you're trying to work out what a PIV unit will cost to run, tell us which system you're considering and whether you're looking at heated or non-heated. We'll explain the difference in electricity use, what affects the running cost and what you're likely to be paying for rather than pluck a figure out of thin air..
Frequently asked questions
Yes. The fan is designed to operate continuously, providing background ventilation day and night. The heater on a heated model does not necessarily run continuously..
Check the specific unit's rated fan power in watts and its operating setting. To estimate daily electricity use, divide watts by 1,000 and multiply by 24 hours..
Yes, when the heater is active. That electricity use is additional to the low-energy fan, and the total depends on heater operation and your tariff..
Not automatically. A dehumidifier extracts moisture from air, while PIV introduces filtered air for background ventilation. Running cost comparisons only make sense with the actual models and usage..
It's generally best to leave PIV operating as designed. Switching it off overnight removes ventilation during a period when bedroom moisture and window condensation often build up..
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