Fans and dehumidifiers

Ceiling and ventilation fans

ENERGY STAR qualified ceiling fans move air up to 20 percent more efficiently than standard models. If your ENERGY STAR qualified ceiling fan does not include lighting and you wish to add it, be sure to purchase an ENERGY STAR qualified light kit, with either pin- or screw-based CLFs.

A 60-watt (W) ceiling fan costs between 10¢ and $ 2 to operate monthly, while an air conditioner can cost between $ 7.50 and $ 41 a month. Fans do not actually cool a room; they cool you by circulating air.

If a ventilating fan contains a light fixture, the total lamp wattage must not exceed 50 W. Fans with a night light must use a bulb that consumes 4 W or less.

To qualify for ENERGY STAR, a ceiling fan with lighting must be 50 percent more energy-efficient than a standard fan/light combination and must move air up to 20 percent more efficiently than a standard model.

ENERGY STAR qualified ventilation fans, such as those found in range hoods and bathrooms, typically use about 65 percent less energy than standard models. Better blade design enables them to move more air more efficiently, and their high-performance motors last longer. A minimum one-year warranty is required, and noise levels cannot exceed strict criteria set according to the type of fan.

Residential dehumidifiers

Portable residential dehumidifiers may also display the ENERGY STAR symbol if they perform at high levels of energy efficiency. ENERGY STAR qualified dehumidifiers use about 15 percent less energy to remove the same amount of moisture as conventional units.


The energy efficiency of a dehumidifier is measured by its energy factor (EF), or the amount of water it removes per kilowatt hour (kWh) of energy used. The EF is usually found on the nameplate of the unit. The higher the EF, the more energy-efficient the unit. To qualify for
ENERGY STAR, standard-capacity dehumidifiers (up to 35.5 litres of water removal per day) must have an EF between 1.20 and 1.80, depending on their capacity. High-capacity units must have an EF of 2.5 or higher.

Water removal capacity Minimum energy factor Minimum energy factor
(L/day) (pints/day) (L/kWh)
Standard-capacity dehumidifiers
? 11.8 ? 25 1.20
> 11.8 to ? 16.6 > 25 to ? 35 1.40
> 16.6 to ? 21.3 > 35 to ? 45 1.50
> 21.3 to ? 35.5 > 45 to ? 54 1.60
> 25.5 to < 35.5 > 54 to < 75 1.80
High-capacity dehumidifiers
? 35.5 to ? 87.5 ? 75 to ?185 2.50

The following table can be used as a guide when selecting a standard-capacity dehumidifier for residential use.

Area to be dehumidified Humidity conditions*
(moist ure accumulat ion per day) (L)
Square metres Damp1 Wet2 Very wet3
46 m2 (500 sq. ft.) 6 7 8
93 m2 (1000 sq. ft.) 8 9 11
139 m2 (1500 sq. ft.) 10 12 14
186 m2 (2000 sq. ft.) 12 15 18
232 m2 (2500 sq. ft.) 15 18 21
279 m2 (3000 sq. ft.) 18 22 24

1 Damp – An area that feels damp and where a musty odour prevails, especially in humid weather.
  Damp spots may appear on the walls and floor.
2Wet – The space feels and smells wet, walls or floor sweat, or seepage is present.
3Very wet – Walls sweat, and the floor is almost always wet.

* If capacity is not measured in metric units, remember that two pints are equivalent to approximately one litre.

[Previous] [ Table of Contents ] [ Next ]