What To Know Before Buying An Air Conditioner

What To Know Before Buying An Air-Conditioner


Before splashing out on an air conditioner in Singapore, arm yourself with knowledge. It’s vital. Choosing the right cooling unit isn’t just about beating the heat—it’s about finding the perfect match for your space and needs while keeping energy consumption low.

From understanding British Thermal Units (BTUs) to gauging decibel levels, each factor plays a crucial role in your decision-making process. Whether it’s a compact portable air conditioner for your HDB flat or a robust central air conditioning system for commercial spaces, options abound.

This guide walks you through essential considerations and sheds light on various types of air conditioners available—ensuring you make an informed choice without regrets. Ready to keep cool efficiently? Read on.

Key Takeaways

  • Check how powerful an air conditioner is using BTUs. For a small room, you need about 6,000 BTUs. Big rooms might need up to 15,000 BTUs.
  • Energy efficiency matters. Look at the EER number to see if the air cooler will save on electricity bills. Higher EER numbers mean more savings.
  • Noise level is important too. If you want a quiet space, choose an air conditioner with low decibels.
  • There are different types of air conditioners like window units for single rooms and central systems for whole houses.
  • Think about where you can put your air conditioner and how much it costs to install it. Portable ones are easy but may not cool big spaces well. Split systems are quiet but need a place outside for part of the unit.

Before You Buy: 3 Key Things You Should Know

Before you pick your next air conditioner, there are crucial bits to get right. You need to understand BTU capacity, how energy efficient the unit is, and how loud it will be.

Talking about BTU, or British Thermal Unit… Think of it as the power behind cooling your room. It tells you how big an area the aircon can cool down. Then comes energy efficiency – a big deal if you want to keep bills low.

Look for the EER number; higher means more savings on electricity. Lastly, noise levels matter too – measured in decibels (dB). You don’t want a machine that’s too noisy in your space.

So when choosing an air conditioner, keep in mind these three things: its cooling power (BTU), its ability to save on electricity costs (EER), and how quiet it is (dB). This knowledge sets you up well for finding the right fit for your home or office.

1. BTU (British Thermal Unit) / Capacity



BTU stands for British Thermal Unit and measures the air-conditioner’s power to cool your space. Think of BTUs as a way to match the cooling strength of an aircon with the area it needs to cool.

Small rooms up to 150 square feet work well with a unit that has about 6,000 BTUs. If your room stretches up to 350 square feet, you’ll need around 9,000 BTUs. For those very large spaces over 500 square feet, aim between 10,000 and 15,000 BTUs.

Getting this right keeps your room comfortable without dampness or wasted energy.

Here at Billy Aircon, we’ve seen all room sizes and know exactly how important it is to pick an air conditioner with the correct capacity. Too many times homeowners face high bills or wear out their units because they chose wrong—too powerful or not powerful enough for their room size.

Keep these numbers in mind when selecting your next air conditioning unit for energy-efficient cooling customised just right for your space.

2. EER (Energy Efficiency Rating)



EER tells you how efficient an air conditioner is. A higher EER means the unit uses less energy, saving you money on bills. Think of it like this: for every point above 10 in the EER scale, your power costs drop by about 10% each month.

So, picking an air-conditioner with a good Energy Efficiency Ratio is smart if you want to cut down on electricity use and save cash over time.

Billy Aircon will show you models with high EER numbers. This ensures that your cooling needs meet energy-saving goals. Always look at the EER label before buying. It’s one step toward lower energy charges and more eco-friendly living spaces.

3. dB (Decibels)

dB, or decibels, measure how loud your air conditioner is. Low dB means a quiet unit. This matters a lot in bedrooms or where you need silence. Some air conditioners are really silent and fit well in such spaces.

At Billy Aircon, we’ve seen customers happy with units that have lower noise levels. Silent models are perfect for sleeping areas. Choose an air conditioner with low decibels for peace and comfort in your home.

What Types of Air-Conditioners Are On The Market?

Many kinds of air coolers are out there, each fitting different places. Let’s break them down.

First off, window air coolers sit in your window. They’re great for small rooms. Next, split air coolers have two parts: one inside and one outside—perfect for cooling large spaces without needing a big hole in the wall.

Central air systems are best for whole houses or big areas; they push cold air through ducts in floors or ceilings. Lastly, portable air coolers can move from room to room; they work well if you can’t fit other types.

Each type has its own perks and fits certain spots better than others.



1. Window Air Conditioner

A window air conditioner is a compact, all-in-one unit perfect for cooling single rooms. You’ll find it easy to set up and take down, making it an ideal choice if you’re in a smaller space or renting your home.

Unlike central air conditioners that need more room and installation work, these units fit snugly into a window frame. They cost less too, offering a budget-friendly option for beating the heat.

These models can be louder than other air conditioning types due to their design, which combines both the cooling system and fan in one unit placed inside the room. But with advancements in technology, many newer models have become quieter while still being powerful enough to keep your space comfortable.

With choices ranging from basic cooling functions to those with digital thermostats and remote controls, window air conditioners provide efficient climate control for any small area needing relief from high temperatures.

2. Split Air Conditioner

Split air conditioners consist of two parts. An indoor unit cools your room. The outdoor unit throws out the heat. They work together quietly, making hardly any noise. This setup means no big holes in your walls for ducts.

These coolers are great for cooling more than one room at a time. You need a professional like Billy Aircon to install them properly. Once set up, they offer quiet comfort without taking up window space, unlike window air conditioners or bulking units like central systems.

3. Central Air Conditioner

Central air conditioners excel in cooling entire homes efficiently. They use a network of ducts to deliver chilled air to every room. This system ensures consistent temperature control throughout your house.

Expect higher installation costs due to the complexity of setting up ductwork.

Billy Aircon confirms that central air-conditioning systems require professional installation. Once set up, they offer long-term energy savings by maintaining an even climate across large spaces.

Ideal for multiple rooms, these units provide a solution for comprehensive ventilation and dehumidification, enhancing indoor air quality significantly.

4. Portable Air Conditioner

Portable air conditioners offer you flexibility. They move easily from room to room. You don’t need permanent fixing for them. This makes them perfect for places where fixed units don’t fit.

Portable units are less efficient than other types but still cool your space well.

They work great for temporary needs or smaller areas. No complex installation is needed. Just plug them into a wall outlet and start cooling down your room right away. Billy Aircon knows how important easy solutions can be for sudden heat waves or guest rooms needing quick comfort without the hassle of big installs.

So, which air-conditioner type should you get?



Picking the right air-conditioner isn’t just about the cost or looks. It’s about your space and needs. If you have many rooms, consider a central system to cool everything evenly. For one room, a window unit might do just fine.

Think about how big your area is too. A bigger space will need more power to keep it cool.

1. The Number of Rooms

Billy Aircon knows choosing the right air conditioner matters a lot. If your home has many rooms, a central air conditioning unit is best. This system cools multiple rooms efficiently.

But if your house layout allows it, split air conditioners can also cool several rooms well.

For one room, window or portable air conditioners are ideal choices. They fit single spaces perfectly and are easy to install. Think about how many rooms you need to cool before deciding.

This choice will guide you to the most fitting option for your space and comfort needs.

2. The Area Size You’re Planning To Cool

Choosing the right air conditioning unit depends a lot on the size of your room. Small rooms, up to 150 square feet, work well with units that have around 6,000 BTUs. For bigger spaces, like those up to 350 square feet, you’ll need something stronger — about 9,000 BTUs should do it.

And if you’re cooling a very large area over 500 square feet, aim for an air conditioner with between 10,000 and 15,000 BTUs. Picking the wrong size can lead to wasted energy and higher bills.

For example, if you’ve got a compact portable air conditioner in mind for a small study room or bedroom — think Mitsubishi Portable ACs — they often fit the bill nicely for smaller areas due to their lower BTU output.

But for larger living spaces or open-plan areas in your home or office requiring more extensive coverage? A split air conditioner might be your best bet due to its higher capacity for cooling larger spaces efficiently.

Always match the unit’s power with your space size; this ensures efficient operation and keeps costs down.

Other Considerations



Before picking your air cooler, think about a few more things. Check how much room you have for it. Some spots might be too tight for bigger units. Also, listen to the noise each model makes.

You’ll want something quiet if it’s going in a bedroom or study area. Lastly, don’t forget installation costs and work needed—some systems are easier and cheaper to set up than others.

Amount of Space You Have:

Your space dictates your air-conditioner choice. Big rooms need units with more power. Small spaces work well with smaller, portable air-conditioners. At Billy Aircon, we’ve found that not every home fits a central air system due to a lack of outdoor space for the unit or insufficient room indoors for ductwork.

If you live in a flat, a window air-conditioner might be off-limits because you don’t have the right size windows. Portable units are great here but keep in mind they take up floor space.

Choosing split air conditioners requires wall space inside and a spot outside for the compressor—often tricky in tight spaces. Our experts frequently recommend these for single rooms where installing bigger systems isn’t possible.

Through years of fitting various types across Singapore homes and offices, we guarantee there’s always an option that matches your exact needs—be it a sophisticated mini-split system that barely takes any room or a compact portable unit easy to move around.

Noise Levels

Air conditioners come in different noise levels. Silent running units are best for bedrooms or study areas. These rooms need quiet to help you sleep or focus. Some air conditioners make more noise, measured in decibels (dB).

This number tells you how loud the unit will be.

If you have a place where silence matters, pick an air conditioner with low dB numbers. Models vary, so check the specs carefully. Bedrooms and quiet zones demand models with fewer decibels to avoid disruptions.

Billy Aircon offers options that balance cooling power and peaceful operation, ensuring your comfort without adding unwanted noise to your space.

Installation Costs (and Effort)

Choosing the right air conditioner goes beyond just picking a model. Installation costs and effort play a big part in your decision. For window air conditioners, you’ll find them easier to install.

Most people can do it with basic tools and a bit of DIY knowledge. This makes them a budget-friendly choice.

On the other hand, split systems and central air-conditioning units need professional help for installation. They involve complex setups like running pipes and installing outdoor units.

Central systems especially cost more because they cool your whole house through ducts hidden in walls or floors. Portable air conditioners offer ease too; roll them in, plug them into a power socket, and you’re set—minimal fuss involved.

So, before you buy an aircon from Billy Aircon or plan where to place your new fan coil unit or dehumidifier, keep in mind the extra charges for setting it up plus any special needs like insulation for efficient cooling or upgrading power plugs for safety.

These details ensure you get comfort without blowing your budget on unexpected expenses.


1. What should you consider before buying an air-conditioner?

Think about the size of your room, humidity levels, and if you need features like dehumidifiers or air purifiers. Look for models with HEPA filters to catch smaller particles, ensuring cleaner air.

2. How do inverter air conditioners differ from regular ones?

Inverter air conditioners adjust power use based on heat load, making them more energy-efficient than standard units. They’re quieter too, thanks to their unique compressors.

3. Why is refrigerant type important when choosing an aircon?

Refrigerants like R410A are eco-friendlier than older types such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). Selecting the right one helps reduce your carbon footprint and meets regulations set by environmental agencies.

4. Can installing an AC help with PM2.5 and dust at home?

Yes! Aircons with high-efficiency particulate air (HEPA) filters can trap PM2.5, dust, smoke, and other small particles—improving indoor air quality significantly.

5. What installation costs should you expect for different types of AC units?

Room air conditioners might only need a window space or a small hole in the wall—making them cheaper to install compared to mini-split systems that require more effort due to separate indoor and outdoor components connected through pipes.

6. How does buying an AC from Billy Aircon ensure peace of mind?

Billy Aircon provides detailed product information on Mitsubishi portable and inverter models along with installation services—ensuring everything fits perfectly within your budget while meeting all requirements for efficiency and comfort.