How to Buy a Humidifier, Air Purifier or Dehumidifier
Three different devices that are easy to mix up
A humidifier adds moisture to dry air, for example in winter in colder regions or when an air conditioner runs all day. A purifier removes dust, pollen, smoke and allergens through filters. A dehumidifier is for damp places: a basement, a wardrobe, a new flat after renovation, or any home in the rainy season. There are also combined devices and air washers. First decide which problem you're solving, because there is no all-purpose solution.
How to choose a humidifier
Ultrasonic models are quiet and raise humidity fast, but need clean water, otherwise a white deposit appears. Evaporative ones (natural evaporation) regulate humidity themselves and leave no deposit, but they are louder and need new cartridges. Look at the tank volume, output in ml/h and whether there is a humidistat. For a child's room, value a quiet night mode and easy cleaning. The tank should be washed every few days, so look for a wide opening your hand fits through.
How to choose a purifier
The main things are the filter and the output. HEPA H13 traps fine particles, and a carbon filter deals with smells. Output is given as CADR in m³/h and should match the room size. For allergy sufferers it's important to change filters on time, and they can cost a lot, so ask about the price of replacement cartridges and how long they last.
Dehumidifier
Here you look at litres per day and the size of the room: a basement needs a more powerful model than a wardrobe. Ask whether it can drain condensate to a drain and switch off automatically when the tank is full. It is also worth asking about the minimum temperature at which the dehumidifier works well: in a cold basement some models lose output.
What to put in your request
- type of device: humidifier, purifier, dehumidifier or combined;
- room size: in m²;
- what for: child's room, allergy, pets, smoke, damp;
- filter or technology: HEPA H13, carbon, ioniser, UV, ultrasonic;
- output: CADR, ml/h, litres per day;
- features: night mode, humidity sensor, Wi-Fi, auto mode;
- brand and model, new or used, budget.
Example: “I need an air purifier for a 20 m² child's room in Kuala Lumpur, HEPA H13 filter, quiet night mode, air quality sensor, new. Courier delivery or pickup, budget up to RM 570.”
How it works on BlaBlaPrice
You write one request on BlaBlaPrice, and sellers of climate equipment reply in the chat: which model, what is included, the price and terms. They see their place and often improve their offer. The best-value one is shown first, with reviews next to it. Your phone number is hidden, and it is free for buyers. More on the “How it works” page.
Also take a look at fans and heaters and convectors.
