Buy Dehumidifiers and Air Purifiers Online

Damp Control is powered by CFW Dryers - your humidity control specialists. Part of the CFW Industries group operating in South Africa since 1966, we specialize in:

  • Sales of high quality dehumidifiers, air purifiers and humidifiers for domestic, commercial and industrial applications in Africa.
  • Dehumidifier rentals and expert dehumidifier application consulting.
  • Dehumidifier repairs, technical expertise and after-sales service.
About CFW Dryers

dehumidifiers humidifiers air purifiers industrial dehumidifiers

Featured Dehumidifiers

Air Purifiers DELONGHI DNC 65

Very quiet, robust, environmentally friendly dehumidifier. Ideal for households, jaccuzzis & yachts (40m²). Bacteria filter, dust collector, anti-frost, 2L / cont. drain, desiccant type (cold climate).

R3,800.00 (Incl. VAT & Delivery) More Info Add to Cart
Air Purifiers SECCOPROF 28

Professional power! A best selling industrial dehumidifier - preferred by museums, hospitals, etc (80m²). Humidistat, auto-defrost, 10L tank / cont. drain, refrigerative type (warm climate)

R7,782.00 (Incl. VAT & Delivery) More Info Add to Cart

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dehumidiers low cost

From only R199 per month!*

Whether you just want to avoid the capital outlay of buying a dehumidifier or take care of short-term domestic damp problems, home dehumidifier rental is a cost effective alternative to purchase. Our experienced staff can assist you in choosing the right dehumidifier for your needs. Asthma-causing dust mites, damp rooms, water damage, wet walls, floors, and windows will be a thing of the past! Air dryers with built-in air purifiers are also available.

* Rental from R199 pm on a 12 month contract. Terms and Conditions apply.

About Damp Control

Damp Control is the dehumidifier and air purifier shopping portal for CFW Dryers, a subsidiary of the CFW Industries Group that has been operating in South Africa since 1966, with offices in Cape Town and Joburg. CFW Industries has diverse mechanical engineering operations (industrial fans, industrial ventilation, temperature and humidity control, dust extraction and related applications) with customers throughout Southern Africa and globally.

CFW Domestic Dryers was formed to provide focused customer service to the domestic and light commercial customers requiring dehumidifiers and air purifiers as well as related humidity control products. We offer practical application advice and technical after-sales service provided by in-house professional engineers with over 20 years of experience. Whereas other vendors may seek to sell you a quick solution, we pride ourselves on building a relationship with our clients and providing high quality solutions that last. We repair dehumidifiers and have a servicing department that carries a wide range of spares for dehumidifiers. We provide dehumidifier courtesy units to customers if we do not have stock of a specific component and need to import articles. We also provide affordable dehumidifier rentals, on a long-term or short-term basis.

Our Services Include

Buy Dehumidifiers, Humidifiers and Air Purifiers of all sizes!

Essential Background Information on Dehumidifiers

Optimum humidity for human health and comfort

Humidity is the amount of water vapour in the air, and is measured in terms of Relative Humidity (RH), which is the amount of water vapour actually present compared to the moisture-carrying capacity of the air. The optimum RH for human health and comfort is approximately 50%, since higher levels promote mould, mildew, and dust mites, and lower levels can cause respiratory problems and encourage bacterial and viral growth.

Why not use air conditioners instead?

Air conditioners are primarily designed for temperature control rather than humidity control. They usually operate by means of a thermostat only (which senses room temperature) that allows the unit to maintain the desired temperature, and switches the unit off once it is achieved. The humidity may still be too high at this temperature, but the air conditioner is off and no longer extracting moisture. Furthermore, an air conditioner typically consumes significantly more energy than a dehumidifier for the same size space.

A dehumidifier with a higher power rating does not necessarily imply higher running costs

Regardless of the power consumption of a dehumidifier, its built-in humidistat will ensure that the dehumidifier is switched off once the desired level of humidity has been reached in a room. Larger, more powerful dehumidifiers will extract moisture from the air more quickly and operate for shorter periods. In fact, higher capacity dehumidifiers can often be more energy efficient. Since household humidity can vary greatly, it is advisable to purchase one or maybe two dehumidifiers that have a slightly higher capacity than required.

Keep doors and windows closed

One of the most important hints about dehumidification is to keep your windows and doors (especially external doors) closed, thereby reducing moisture ingress from the outside. A sealed room allows one to control the environment properly without interference from external factors.

Optimal placement of dehumidifiers

Dehumidifiers should ideally be placed such that the dry air discharge blows to the opposite end of the room. Since warm air rises, it is also better to place the unit closer to the ground. Most dehumidifiers can be wall-mounted, provided the recommended manufacturer clearances are adhered to, in order to ensure that there is sufficient air circulation around the unit. Observe all the manufacturer warnings regarding electrical safety - in particular do not set up water drainage near electrical circuits or devices.

Selection of dehumidifier based on climate

If you are using a dehumidifier in a warmer, more humid climate (typically above 20ºC) then a refrigeration type dehumidifier would normally work best, and for colder, drier environments (typically below 20ºC), a desiccant type dehumidifier is more effective (particularly if your damp problems occur mainly during winter).

Key features of dehumidifiers

TABLE 1 - A Rough Guide to Required Moisture Extraction based on Area and Dampness

Area to Be Dehumidified Moisture Accumulation in litres per 24 hour day
Sq. Meters Mild Damp         Moderate Damp     Damp              Wet               Very Wet         
10 2.5 4 5 5.5 6
23 3 4.5 5.5 6 7
46 3.5 5 6 7 8
93 4 6 8 9 11
139 5 7 10 12 14
186 6 9 12 15 18
232 7 12 15 18 21
279 9 15 18 22 24

*Mild Damp - Space feels mildly damp, increased risk for mould & dust mites, isolated damp problems, condensation droplets may appear.
*Moderately Damp - Space feels damp, condensation droplets may appear, has a musty odour only in humid weather.
*Damp - Space feels very damp and has a musty odour, especially in humid weather. Damp spots may appear on walls and floor.
*Wet - Space feels and smells wet. Walls or floor sweat, or seepage is present
*Very Wet - Walls sweat and floor is almost always wet.