With a wide range of brands and models available in the market, how do you choose the right air conditioner? Here are seven essential factors to consider before purchasing an air conditioner in 2025:
1. Choose the right cooling capacity
When selecting an air conditioner, it’s better to choose a higher capacity rather than a lower one. Cooling capacity is typically measured in HP (horsepower) or BTU. Some common capacity ratings include:
– 1HP ≈ 9,000 BTU – suitable for rooms from 11–17m²
– 1.5HP ≈ 12,000 BTU – suitable for rooms from 15–23m²
– 2HP ≈ 18,000 BTU – suitable for rooms from 24–30m²
– 3HP ≈ 24,000 BTU – suitable for rooms from 32–48m²
Opting for a slightly higher capacity unit ensures faster cooling, stable performance, and prolonged durability. Avoid choosing a lower capacity as it will lead to constant operation, causing the unit to overheat and increase electricity consumption.
Additionally, factors such as ceiling height above 2.8m, multiple glass doors, west-facing orientation, and top-floor locations can reduce cooling efficiency. In such cases, choosing a higher-capacity air conditioner is recommended to ensure optimal performance.
2. Floor-standing or wall-mounted air conditioner?
Floor-standing air conditioners, also known as tower ACs, typically have a capacity of 3HP or higher. They are larger in size, occupy more space, but offer quicker cooling, stronger airflow, and are ideal for spacious living rooms, shops, and restaurants.
Wall-mounted air conditioners usually have a capacity of less than 2HP. They are compact, mounted on walls, and suitable for bedrooms, home offices, or smaller spaces.
There are also built-in/central air conditioners designed for villas or large apartments, but due to their complex installation and high costs, they are not common for typical households.
Tower air conditioner.
3. Energy efficiency
Air conditioners are rated with five energy efficiency levels, with level 1 being the most energy-efficient. The new standard evaluates efficiency based on the APF (Annual Performance Factor) value, which indicates the average energy efficiency of the air conditioner over a year. This value reflects the actual power consumption during use.
The efficiency levels range from 1 to 5, with level 1 being the most energy-efficient. For example, for a 1.5HP air conditioner to be rated as level 1, it should have an APF value of 5.0 or higher. Premium models nowadays can achieve APF values of 5.2 and above. For a 3HP air conditioner, an APF value of 4.2 or higher is considered energy-efficient.
Central air conditioning.
4. Outdoor unit (condenser)
The quality of the outdoor unit directly impacts the performance and durability of the air conditioner. Consumers should prioritize models with superior configurations, such as dual copper pipes, electronic expansion valves, and full DC inverter motors.
Additionally, the compressor is a crucial factor to consider. Opt for well-known and reputable brands instead of lesser-known ones.
Air conditioner condenser.
5. Indoor unit (evaporator)
The indoor unit also requires careful consideration. Factors such as multi-directional airflow, wing design that prevents direct blowing, air purification and filtration capabilities, and control options significantly impact the overall user experience.
Models that offer remote control, mobile app control, or even voice control are becoming increasingly popular due to their convenience.
6. Fresh air function
Air conditioners with a fresh air function ensure proper ventilation by circulating outdoor air into the room without the need to open windows, eliminating stuffiness and health issues associated with enclosed spaces.
While the fresh air intake may not match professional ventilation systems, these units offer the advantage of simple installation, ease of use, and affordability. They are an excellent choice for families with elderly members, young children, or individuals prone to discomfort in enclosed environments.
7. Which brand to choose?
Brand selection is a crucial factor. Opt for reputable brands and avoid compromising quality for a lower price by choosing unknown brands. Well-known brands offer better performance assurance and more comprehensive after-sales service and warranty policies.
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