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R290 Commercial Refrigerators in Singapore: A Buyer's Guide

• en • R290 commercial refrigerator

An R290 commercial refrigerator is a purpose-built unit that uses propane as its refrigerant. It has a very low global warming potential and is generally efficient, but propane is flammable. In Singapore, a business buying one must check three things: the unit is registered with the National Environment Agency (NEA) and carries the energy label, the flammable refrigerant charge complies with fire safety rules, and any servicing is done by technicians trained in hydrocarbons.

This guide is written for restaurant owners, caterers, food manufacturers and kitchen managers who are buying or replacing refrigeration equipment.

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TL;DR

  • R290 is propane. NEA describes HFCs as potent greenhouse gases, and R290 is a low-GWP alternative with a GWP of about 3 or less.
  • Since 1 April 2025, commercial storage refrigerators sold in Singapore must meet MEPS and the MELS requirements1-with-effect-from-1st-april-2025.pdf).
  • R290 is flammable. Buy sealed, self-contained units designed for it, and never convert an existing R134a or R404A unit.
  • Use only maintenance contractors trained in hydrocarbon refrigerants.
  • Compare the energy label and annual energy use, not the refrigerant alone.

Table of Contents

What R290 is and why kitchens are moving to it

R290 is the refrigerant code for propane, a natural hydrocarbon. It has no ozone depletion potential. Its global warming potential (GWP) is quoted at roughly 0.02 to 3, depending on the assessment method. Common hydrofluorocarbon (HFC) refrigerants such as R404A have a GWP many hundreds of times higher.

NEA explains that HFCs are much more potent greenhouse gases than carbon dioxide and sets out how refrigerant use in the refrigeration and air-conditioning sector is being managed in Singapore. Equipment makers are therefore moving self-contained commercial units to natural refrigerants. The European Commission also lists non-fluorinated options for stand-alone commercial refrigeration, which shows the same direction of travel in other markets.

For a kitchen, there are two practical reasons to consider R290:

  1. Lower direct climate impact. A leak releases a gas with negligible warming potential.
  2. Efficiency. A laboratory comparison of R290 and R454C in commercial refrigerators and display cabinets examined performance in these appliances. R290 is generally associated with a high coefficient of performance, though results depend on the design of each unit.

The efficiency claim needs a caveat. Research on life cycle climate performance of commercial refrigeration shows that the overall footprint depends on system design, refrigerant charge, leak rates and the energy source of the electricity grid. A refrigerant does not make a poor cabinet efficient. The energy label on the finished product is the better guide.

R290 compared with R134a and R404A

Readers often ask which refrigerant is better, R290 or R404A, and whether R134a can be swapped for R290. The table summarises the main differences.

Point R290 (propane) R134a R404A
Type Hydrocarbon HFC HFC blend
Direct GWP About 3 or less High Very high
Flammability Flammable (A3) Non-flammable Non-flammable
Typical use in kitchens Sealed self-contained units Older chillers and cabinets Older freezers and larger systems
Regulatory direction in Singapore Allowed within fire safety limits Increasingly restricted Increasingly restricted
Servicing Hydrocarbon-trained technician required Conventional procedures Conventional procedures

For a detailed technical comparison, see our article on R290 versus R134a for commercial kitchens.

Singapore rules that apply to R290 units

Three sets of rules matter to a buyer. All of them mainly bind suppliers, but they affect what you can buy and how you operate it.

Energy labelling and minimum performance

From 1 April 2025, all commercial storage refrigerators and water heaters sold in Singapore must meet the Minimum Energy Performance Standards (MEPS) and comply with the Mandatory Energy Labelling Scheme (MELS), according to an NEA circular to suppliers1-with-effect-from-1st-april-2025.pdf). NEA publishes the MEPS requirements and the tick rating framework, including the maximum annual energy consumption for regulated refrigerators.

In practice, ask the supplier for:

  • the model’s NEA registration details;
  • the energy label showing the tick rating and annual energy consumption;
  • the rated refrigerant and its charge in grams.

The same NEA circular carries an advisory that suppliers of commercial storage refrigerators using flammable refrigerants such as R290 must comply with the Singapore Civil Defence Force (SCDF) requirements for flammable refrigerants in stand-alone units.

Fire safety limits on flammable refrigerant

Singapore regulates flammable refrigerant storage under the Fire Safety Act. The Fire Safety (Flammable Refrigerants, Exemption) Order 2013 exempts refrigerators from the licensing requirement under defined conditions, including a limit on the amount of refrigerant and labelling requirements. The SCDF Fire Code appendix on this subject, Appendix 22, is the reference we have used for the 150 gram charge figure often quoted for self-contained appliances.

The international appliance standard has since been revised. Danfoss explains that the IEC 60335-2-89 charge limit for flammable refrigerants was increased in 2019. Because the Singapore order was amended in 2023, confirm the current limit with your supplier and SCDF before you buy a larger unit. Do not assume that a figure quoted in another country applies here.

Handling by workers

The Ministry of Manpower and other agencies issued a joint circular on safe handling and use of hydrocarbon refrigerants. It states that hydrocarbon refrigerants carry a fire and explosion hazard in addition to the hazards of conventional refrigerants, and that workers unfamiliar with this may treat them like conventional gases. This is the risk a kitchen manager should plan around.

Why you cannot convert an old unit to R290

Some owners ask whether R290 can simply replace R134a or R404A in an existing cabinet. It cannot. R290 needs components designed for a flammable gas, including suitable electrical parts and a compatible compressor and oil. Swapping the gas in a system built for another refrigerant is unsafe, may breach safety rules and may void the manufacturer’s warranty. The MOM-linked circular above is the starting point for the regulatory position.

The practical answer is to buy a new unit built for R290 from the factory. For a general discussion of why replacement choices are limited when an old system uses a phased-out refrigerant, this overview of refrigerant replacement options is a useful read, although it is written for US homeowners and is not specific to Singapore.

What to check before buying

Use this list when comparing R290 commercial refrigerators.

  1. Registration and label. The model should be registered with NEA and display the energy label. A 5-tick rating corresponds to a low Energy Efficiency Index, which NEA sets out in its MEPS tables.
  2. Annual energy consumption. Compare kWh per year between models of similar volume. Multiply by your electricity tariff to estimate running cost.
  3. Refrigerant and charge. The rating plate should state R290 and the charge in grams. Check that the charge is within the applicable limit.
  4. Sealed, self-contained design. The refrigeration circuit should be factory-sealed. Avoid any supplier proposing a conversion.
  5. Operating environment. Kitchens are hot. Confirm the climate class and the ambient temperature the unit is rated for, and leave the ventilation clearances stated by the manufacturer.
  6. Service support. Ask who will service the unit and whether they are trained in hydrocarbon refrigerants.
  7. Labelling. Flammable refrigerant units should carry the warning labels required by the fire safety order.
  8. Size and layout. A counter freezer or chiller must fit the line. Our note on restaurant refrigeration layout covers sizing and placement.

A simple running cost example

Suppose two chillers of similar size have rated annual consumption of 1,500 kWh and 1,100 kWh. The difference is 400 kWh a year. At a tariff of S$0.30 per kWh, which is an illustrative figure and not a quoted rate, the saving is S$120 a year per unit. Across a kitchen with six units over a seven-year life, that is S$5,040, before any grant. Use your own tariff and the labelled figures for your shortlisted models.

Annual energy use and savings calculation for chillers

The point of the example is the method. Check the label, calculate the difference and set it against the purchase price.

Grants and payback

Energy-efficient refrigeration may qualify for government support in Singapore. Our own guidance describes equipment support of up to 70% under the Enterprise Energy Efficiency grant for qualifying projects. Eligibility depends on the scheme’s current conditions, the equipment and the business, so confirm the requirements before you place an order, not after.

Further reading on this site:

Our view on R290 in commercial kitchens

We supply commercial kitchen equipment to Singapore food businesses, and energy-efficient equipment and grant guidance are central to what we do. Our view on R290 is practical.

First, refrigerant is one factor among several. A kitchen manager who chooses a unit only because it uses a natural refrigerant may end up with a model that consumes more electricity than a well-designed alternative. The energy label and the annual kWh figure tell you what the unit will cost to run.

Second, safety is a procedure, not a worry. Sealed R290 units are designed for kitchens, but the people who repair or dispose of them must know the difference between a hydrocarbon and an HFC. Put the requirement in your service contract.

Our view on R290 in commercial kitchens — overview diagram

Third, buy new for R290. A retrofit saves nothing once you account for the redesign, the compliance risk and the warranty.

Fourth, plan the purchase together with the grant. Eligible equipment and the application sequence matter, so speak to us before ordering. We can discuss which models in our range suit your kitchen and what the label and the supplier documents show.

— David

Maintenance for R290 units

A sealed unit still needs routine care.

  • Clean condenser coils on a schedule, since dust and grease raise energy use.
  • Check door gaskets and keep doors closed during service.
  • Keep ventilation clearances free of stored goods.
  • Log temperatures daily.
  • Do not use welding torches, grinders or other ignition sources near a unit that has leaked or is being opened.
  • Call a hydrocarbon-trained technician for any work on the refrigeration circuit.

Our commercial fridge maintenance checklist and the six-point refrigeration maintenance checklist for Singapore give task lists you can give your team.

Buying refrigeration from Superior Kitchen Equipment

We sell commercial refrigerators, chillers and freezers to restaurants, caterers and food manufacturers in Singapore, online and through our showroom, where you can see the equipment before you order. Browse the refrigerator, chiller and freezer range, or look at a counter freezer such as the 0.9m Hoshizaki counter freezer. Ask us for the refrigerant type, charge and energy label of any model you are considering.

1.8m Hoshizaki Counter Freezer (75cm)

Frequently asked questions

Can I replace R134a with R290 in my existing refrigerator?

No. R290 is flammable and needs components and a compressor designed for it. A system built for R134a or R404A should not be filled with propane. Buy a new unit designed for R290.

Which is better, R290 or R404A?

R290 has a far lower global warming potential, and R404A is an HFC that is under increasing regulatory pressure. R290 is flammable, so it needs sealed design and trained servicing. Compare the energy label of the actual models, since efficiency depends on the whole unit.

Is an R290 commercial refrigerator safe in a kitchen?

Sealed, self-contained units are designed for commercial use within the charge limits set by fire safety rules. The main risk arises during repair or disposal. Use trained technicians and keep ignition sources away from the unit when it is opened.

What must an R290 refrigerator have to be sold in Singapore?

Since 1 April 2025, commercial storage refrigerators must meet MEPS and MELS requirements, so they should be registered with NEA and show the energy label. Suppliers of flammable refrigerant models must also meet SCDF requirements.

Sources

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