Everyday electricity · Ceiling fans
A fan can run for hours without looking like a big load. What does that mean for your bill?
The answer starts with two things: the power it draws at the speed you use, and how long it stays on. The name on the box is not enough.
A ceiling fan drawing 60 watts for 8 hours uses 0.48 electricity units. Over 30 days, that is 14.4 units. This is a worked example, not a rating for every ceiling fan.
Calculate your ceiling fan's electricity consumption
Find the input wattage on the fan's label or in its manual. For a better estimate at a particular speed, use suitable measured power. Fixed ceiling wiring should be measured by a qualified electrician.
For monthly use, include your billing days and the number of identical fans. One unit is one kWh, an energy measure explained by the US Energy Information Administration.
Our 60 W example works out as 60 × 8 × 30 ÷ 1,000 = 14.4 units. Two identical fans on the same schedule use 28.8 units. A fan used only on weekends needs fewer days in the calculation.
Compare watts before comparing prices
Illustrative fans, each used for 8 hours a day over 30 days. These are assumed average input powers, not measured product comparisons.
All bars start at zero on the same 0 to 20 unit scale. The example difference between 60 W and 30 W is 7.2 units a month.
At an illustrative PKR 50 per avoidable unit, those 7.2 units represent PKR 360 in monthly energy charges. At an example price of 0.30 in your local currency per unit, the same energy difference is 2.16 in that currency. Neither rate is a tariff quote.
Inverter fan vs non-inverter fan in Pakistan
In Pakistan, many fans sold as inverter or energy-saving fans use an electronically controlled BLDC motor. A conventional ceiling fan commonly uses an AC induction motor. But the words inverter, AC/DC and UPS-compatible describe different things. A fan that works on a household UPS is not automatically an efficient inverter-motor fan.
| Check | Conventional fan | Inverter / BLDC model |
|---|---|---|
| Motor and control | Commonly induction motor with a regulator | Electronic motor control; verify the actual design |
| Electricity | Use its input watts at your chosen speed | Check normal and turbo watts; no universal 30 W promise |
| Airflow | Compare air delivery at the same usable setting | Lower watts are useful only with enough airflow |
| Supply and repairs | Check mains/UPS suitability and regulator | Confirm supported voltage, controller compatibility and board warranty |
AC/DC means the model supports specified AC and DC supplies; it does not guarantee identical watts or airflow in both modes. For example, GFC's Perfect AC/DC specification lists different input powers and air delivery for its two modes. This is terminology context, not a product recommendation. Never connect a mains fan directly to a battery unless its instructions explicitly permit the correct DC supply.
Check the exact model's Pakistan Energy Label, not just a shop banner. NEECA's registered fan list includes air-delivery-per-watt service values and star ratings. Compare similar fan sizes and airflow. A higher service value means more air delivery per watt under the test conditions.
Does a BLDC fan always save half the electricity?
No single saving applies to every replacement. BLDC describes a motor design, not a guaranteed monthly bill reduction. Compare the actual input power, airflow, speed setting and hours of use. A lower-watt fan that does not deliver the airflow you need is not a fair like-for-like comparison.
Manufacturer Orient Electric's fan guide discusses BLDC and conventional fan consumption. Treat manufacturer claims as product context; check the specifications of the models you are comparing.
Will turning down the speed cut the units?
It can, but do not assume speed 3 uses exactly half the power of speed 6. The motor, controller and regulator matter. Use a power figure for the setting you actually choose, rather than copying the highest-speed rating into every scenario.
A no-purchase experiment is to choose a comfortable lower setting and record the running hours. Without a suitable power measurement or a manufacturer speed-power table, the change in watts remains uncertain.
Before replacing a working fan, check the payback
Imagine a lower-power option costs PKR 3,000 more and the energy-charge difference really is PKR 360 for each month you use it as described. The simple payback is 3,000 ÷ 360 = about 8.3 months of that level of use.
That is not necessarily 8.3 calendar months. If you use the fan heavily for only five months a year, the same assumptions give PKR 1,800 annual energy-charge savings and a simple payback of about 1.7 years. Installation, maintenance, changing prices and different airflow are excluded.
Pakistan peak hours: first check your bill
Does your bill show separate peak and off-peak units and prices? If yes, use its time-of-use (ToU) rules. An ordinary slab-billed connection does not become more expensive simply because the clock reaches evening. Check your tariff category with your supplier.
| Months | Standard ex-WAPDA DISCO schedule | K-Electric |
|---|---|---|
| December to February | 5 pm to 9 pm | 6 pm to 10 pm |
| March | 6 pm to 10 pm | 6 pm to 10 pm |
| April to May | 6 pm to 10 pm | 6:30 pm to 10:30 pm |
| June to August | 7 pm to 11 pm | 6:30 pm to 10:30 pm |
| September to October | 6 pm to 10 pm | 6:30 pm to 10:30 pm |
| November | 6 pm to 10 pm | 6 pm to 10 pm |
Sources: the standard DISCO timetable recorded in a National Assembly electricity-tariff answer and K-Electric's published ToU timetable. The Assembly document is historical; this is a reference schedule, not confirmation of every supplier's latest notification. Before changing your schedule, verify your current bill, supplier notice or PITC timing page. Reviewed 1 November 2026; future changes are possible.
Moving an optional task outside peak hours can reduce its energy charge on a ToU tariff, but does not itself reduce units. Example only: shifting 10 units from PKR 50 to PKR 40 per unit saves PKR 100 in energy charges. Use your actual rates. Keep essential cooling and food storage running when needed.
Put the comparison into the calculator
Choose a fan in the device activity, enter your watts and actual running hours, and set the quantity once. To compare a replacement's wattage, record the original result, then change the watts while keeping the schedule the same. The comparison-hours field is for a time change, not a different fan's rating.
Try it with your own numbers
Enter your fan input watts, running hours and quantity. Add a price only if you know the applicable energy rate.
Open the bill and devices calculator
For the basics, read our guide to appliance electricity units. You can also explore the energy and carbon calculator and its methodology and limits. No account is needed to calculate.
Two quick questions
How many units does a fan use in one hour?
Divide its average input watts by 1,000. At 60 W, the example is 0.06 units per hour.
Does a remote-controlled fan use power when stopped?
It may keep low-power electronics active. Count standby separately from running hours if you have a measured standby value. Our socket and standby explanation shows the difference between stopping a device and disconnecting it.
Calculation notes: Original teaching examples, checked 1 November 2026. Input power and electricity prices are assumptions, not household averages or current tariffs. Final bills can include slabs, taxes and fixed charges. Sources are linked beside the relevant explanations.
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