(2026) Review of Mitsubishi Heavy Industries Aircon in Singapore

Written by Elvin Yeo, with over a decade of Aircon Installation Experience in Singapore.

If you are looking for a new aircon in Singapore, you have probably heard of Mitsubishi. But did you know there are two different Mitsubishi aircon brands?

Many of our customers get confused between Mitsubishi Electric and Mitsubishi Heavy Industries (MHI). They share the same history from the 1800s, but today, they are completely different companies.

In this guide, I will share my honest, first-hand experience with Mitsubishi Heavy Industries. I will explain the best models, the real electricity savings, the warranty details, and even the common problems you need to watch out for. My goal is to help you make the best choice for your offices.

1. Mitsubishi Heavy Industries vs. Mitsubishi Electric

What is the real difference? As someone who has installed thousands of aircons in Singapore, here is the simple truth:

Mitsubishi Heavy Industries (MHI) is famous for building heavy machinery, rockets, and airplane parts. Because of this, their aircons are built like tanks. They use industrial-grade parts. They have very strong cooling power, making them perfect for commercial offices. They are slightly cheaper than Mitsubishi Electric, but some older models can be a bit noisier.

Mitsubishi Electric (ME). Their aircons are known for being extremely quiet and having very smart, easy-to-use controls. However, their residential units are sometimes less rugged than MHI units when forced to run continuously in Singapore’s hot weather.

The Winner? If you want a quiet aircon with the best smart features for an office, Mitsubishi Electric is a great choice. But if you want a heavy-duty, long-lasting aircon that cools down a hot room extremely fast, Mitsubishi Heavy Industries is the winner.

2. The Best MHI Aircon Models for Singapore Offices

Not all MHI aircons are the same. Based on our 2026 installation data, here are the two best series you should consider for your office.

The SRK-YYS Rocket Series (Best for your offices). This is the newest and most popular model right now. It is called the Rocket Series because it uses Jet Flow technology. MHI used its rocket-engineering expertise to design the fan blades.

• Airflow: It can shoot cold air up to 20 meters across the room.
• Smart Features: It comes with built-in WiFi. You can use the Smart M-Air app on your phone to turn on the aircon before you even reach home.
• Health: It has an Allergen Clear Filter that catches dust mites, pollen, and bacteria.
• Best for: Commercial projects or large open office spaces.

The SRK-ZS Premium Series (Best for office). If you need an aircon for your office, the ZS series is excellent.

• Comfort: It features 3D Auto airflow. With one press of a button, the motors move the air up, down, left, and right. The cold air goes to the ceiling and falls gently like a cool breeze, so it does not blow directly into your face while you sleep.
• Quiet: It features a Silent Operation mode that reduces outdoor compressor noise by 3 decibels, helping your offices work more efficiently.

3. The Best MHI Aircon Models for Singapore Businesses

Based on our 2026 installation data for commercial projects, here are two standout series that perform exceptionally well in business environments.

The SRK-YYS Rocket Series (Best for Larger Open Spaces). This is one of the newest and most popular models for commercial use right now. It draws on MHI’s rocket-engineering expertise to optimize fan blades for powerful performance.

• Airflow: It can deliver cold air up to 20 meters across the space, ensuring rapid, even cooling in large areas.
• Smart Features: Built-in WiFi lets you control the system remotely via the Smart M-Air app. This is perfect for turning on cooling before staff arrive or managing multiple units from your phone.
• Health: Features an Allergen Clear Filter that captures dust mites, pollen, and bacteria, helping maintain better indoor air quality in offices or client-facing areas.
• Best for: Large open-plan offices, retail showrooms, restaurants, or long commercial layouts where consistent cooling is essential.

The SRK-ZS Premium Series (Best for Quieter or Smaller Commercial Areas). For business spaces where comfort and low noise matter, the ZS series delivers excellent results.

• Comfort: 3D Auto airflow adjusts in multiple directions with one button press. The cold air rises to the ceiling and falls gently, avoiding direct drafts on people working or meeting.
• Quiet: Silent Operation mode reduces outdoor compressor noise by up to 3 decibels. This is ideal for offices, meeting rooms, or areas with phone and video calls.
• Best for: Smaller office zones, private consultation rooms, or quieter commercial setups.

(Note: For full EEG aircon grant eligibility on these or similar models, check the latest pre-approved lists on grants.gobusiness.gov.sg. Many MHI inverters and multi-split systems qualify for businesses in sectors like retail, F&B, or offices.)

4. Electricity Costs and the NEA 5-Tick Rating

Electricity bills in Singapore are getting more expensive. This makes energy-efficient upgrades a smart move, especially with potential EEG support for businesses.

Both the Rocket Series and ZS Series are 5-Tick Inverter aircons. This is the highest energy-saving rating from the National Environment Agency (NEA).

How much can you actually save? A lower-rated 2-tick system consumes far more power. A 5-tick MHI System 4 setup has an estimated annual energy cost of around $855 per NEA standards. Compared to a 2-tick equivalent, this can save you up to $400 a year on your SP Group bills.

With MHI’s higher upfront cost offset by these savings, the system often pays for itself in about two years. For eligible businesses, you can even get up to 70% off from the EEG aircon grant in Singapore. Always verify current ratings and pre-approved models directly on the official NEA Energy Efficiency Grant or GoBusiness portal.

5. The Honest Weaknesses (What Other Shops Will Not Tell You)

To give you the best advice, here are the real issues our technicians encounter with MHI units in residential and commercial settings.

The “Jelly” Water Leak Problem Singapore’s high humidity affects all aircons, but MHI models have a deep drainage tray. Daily heavy use without regular cleaning allows dirt and moisture to form a thick jelly that blocks drains, leading to leaks.

• The Fix: Schedule professional Chemical Wash or Steam Cleaning every 6 to 12 months to prevent blockages. This is essential for homes and offices running extended hours.

Need for Thicker Copper Pipes. These units use high gas pressure for fast cooling. Thin pipes from low-cost installers can lead to bursts or leaks over time in demanding environments.

• The Fix: Insist on upgraded G22 copper pipes (0.71mm thickness). At Air-con.com.sg, we use G22 exclusively for all MHI installations to ensure reliability.

Spare Parts Waiting Time: Specialized parts, such as PCBs, may take a few extra days to source compared to some competitors. You should plan ahead for minimal downtime in business operations.

6. MHI Warranty Details in Singapore

Here is the standard coverage:

• Compressor: 5-year warranty.
• Spare Parts: 1 Year warranty.

7. Real Customer Case Studies and Testimonials

Here are real examples from our clients who upgraded to Mitsubishi Heavy Industries.

Case Study 1: Fast Cooling for a Busy Office in Jurong. A client’s open-plan office struggled with afternoon heat buildup. Their old 3-tick system took over 45 minutes to cool the space. We installed the MHI Rocket Series System 3.

• Result: Jet Flow technology now brings the area to 24 degrees Celsius in just 10 minutes, improving staff comfort and productivity.
• Testimonial: Elvin Yeo and his team recommended the MHI Rocket series. The airflow is incredibly strong and covers the entire workspace. We can pre-cool remotely before meetings. Highly recommended for offices! Ms. Sarah Wong, Business Owner

Case Study 2: Cutting Bills in a Tampines Home Office. A small business owner ran the aircon for over 12 hours daily, with bills exceeding $250 a month. We replaced an outdated budget unit with a 5-Tick MHI Inverter system.

• Result: The first-month bill dropped by $60, with consistent performance during long work hours.
• Testimonial: The higher upfront cost was worth it for the real 5-tick savings. The Air-con.com.sg Group team was professional and kept the area clean. The silent operation is perfect for Zoom calls and client meetings. Mr. Kelvin Lee

8. Frequently Asked Questions (FAQ)

Is Mitsubishi Heavy Industries a good aircon brand? Yes. It is one of the most reliable and heavy-duty brands in Singapore. It is especially good for large spaces and areas that get very hot.

How often should I service my MHI aircon? For normal use, you should do general servicing every 3 to 4 months. Because of Singapore’s humidity, we strongly recommend a chemical wash or steam cleaning every 6 to 12 months to prevent jelly buildup and water leaks.

Why is my MHI aircon blinking and not cold? A blinking light usually indicates an error code. It could be due to a dirty filter, low refrigerant gas, or a faulty circuit board. You should turn off the power switch and call a professional technician to check it.

Does the MHI aircon come with a smart app? Yes. Newer models, like the Rocket Series, come with built-in Wi-Fi. You can use the Smart M-Air app to control the temperature and fan speed from your mobile phone.

Final Verdict: Is MHI Worth Your Money?

If your business needs an aircon that cools large spaces quickly, delivers long-term energy savings, and withstands extended daily operation, Mitsubishi Heavy Industries is one of the top choices in Singapore. It is particularly strong for offices, retail, and F&B outlets.