A2L (flammable) HFC R32 Refrigerant



What is A2L (flammable) HFC R32?

HFC 32, Introduced (1st flammable refrigerant in the mass produced AC industry) as a Short Term Single Component in 2015, is an HFC A2L Class Flammable refrigerant with zero ODP and Low GWP, but flammable, and requires: (These requirements must be recomended to Specifiers & End users)

Responsobilities and Obligations

Manufacturers / Authorised Representative / Importers / Distributors

Important: Specifiers, contractors, Installers, Mainteneace companies and End users Must seek written confirmation that the R32 flammable equipment is in compliance with H&S 2016 no. 1107 Statutory Instrument.

See more info in REFERANCE


- Manufacturers, Authorised Representatives, Importers and Distributors are under Obligations to follow ATEX (Atmosphères Explosibles) Directive 2014/34/EU as refered to by UK Regulatory Guide Lines 2016. and H&S Statutory Instrument 2016 No. 1107 .

- Clear Labeling, Installation & Operation instructions must conform & comply with the above mentioned directives, Statutory Instruments and guidlines

- Sales leaflets, advertising, websites etc must follow Adertising Standards" The CAP Code".



Specifiers and designers of building services needs to be aware of the EXTRA HSE requirements and compliance with Statutory Instrument when appyling A2L flammable refrigerants in buildings.

Building Managers and Owners responsibility fall under BS EN378-16,  DSEAR / ATEX regulations and directives and equipment complies with UK H&S Statutory Instrument.

Ensure  UK Statutory Guidelines & manufacturers factory guidelines  are written in the specification including User manual conditions (e.g. Equipment must not be operated by children below the age of 8 years.

Multiple Sytems within a Building needs to be of one type of refrigerant to insure compliance, life cycle security and reduce multiple diciplne maintenance.

Note: R410A for example is non-flammable and will be with us at least 30+ Years (see Kigali Amendment-EPPE) and no extra risk assesment.



Installers, Designers, Building Managers and Owners responsibility fall under BS EN378-16 and DSEAR / ATEX regulations and directives.  A2L R32 Installation


Installers must hold Specilalist qualifications in A2/A2L Class refrigerants (in addition to City & Guilds 2079-11, 12)  . City & Guilds 6187-21


End Users

End users and occupiers must be clearly be informed, trained and made aware of risks associated with flammable or explosive refrigerant before installation...


Space Air

40 years experiance meeting Industry requirements and legal obligation


-Manufacturers have moral and ethical responsibility of providing legaly safe products that contains legal, safe and compliant refrigerants. 

-The restriction in the supply of A1 class R410A for small splits is only in the UK!. Countries like France (largest sale of Heat Pumps systems of over 1 million Europe) heavily restricts the use of any flammables in Public Buildings.

-Same manufacturers operating in the UK supply R410A everywhere in the world! Why NOT in the UK?

-WHY R32 cartel DO NOT DISPLAY FLAMMABLE SIGN or WARNINGS ON SALES LEAFLET, ADVERTISING or WEBSITES??     (Anti persperant spary DOES if use flammable!!!)

-Important: current UK ban Guide Lines, there are no bans on sale of split systems containing less the 3 kg R410A until Jan 2025 (extendable if Safety in question) AND NO BANS for any system or Heat Pumps for larger than 3 kg charge including, multi splits, VRF, Chillers etc.

- Multiple systems in a building need to be of one Refrigerant Class (not a mixture of non flammable A1 & flammable A2L) as each require different skills and proccedures.

-The Montreal Protocole / Kigali Amendment will be the target the UK will follow to share the world effort in the reduction of HFC phase down (A1 & A2L) which is adopted by 197 parties and 140 countries including the UK. see Extract EPEE presentation      

-R32 (A2L class) as a single component is not a suitable solutions in the massly produced split market where 96 million sold annually worldwide. There are better (A1 class current and being developed) environmently and SAFE options.

It is our (all parts of the industry) legal,  ethical, and moral duty to provide viable and safe CHOICES to customers . Commercial dictatorship or personal openion have no place when it comes to safety.

-Insist on A1 class
 like R410A refrigerants when you purchase or specify. IT IS AVAILABLE !!.

Refrierants used in a DX (direct expansion cycle) are circulated (not consumed) to perform efficient energy transfer from inside to outside (cooling) and outside to inside (heating).

The only release to the atmosphere is due to accidental leaks where F-Gas regulation needs to be adhered to as it is primarily and Environmental qualifications for engineers ensuring Environmentally safe handling of refrigerant.


A2L HFC R32 Introduced in 2014/15 has zero ODP gas with a GWP of 675 (Low).

IT IS FLAMMABLE IF 'LEAKED'. Class A2L under ISO 817 and ASHRAE Standard 34 classification.

R32 1st Flammable refrigerant introduced to the AC mass produced industry by Daikin!

It is not covered by Building & Fire regulation standard codes.
Risk Assesment must be carried under UK DSEAR or European ATEX and Statutory Guidance
  Current Class A1 R410A NON-FL:AMMABLE Refrigerant

A1 HFC R410A introduced in 2004 has zero ODP gas with a GWP of 2088 (High). Has a mixture of R32 and R125 (R125 acts as a suppressant to R32 flammability)

IT IS NON-FLAMMABLE IF 'LEAKED'. Class A1 under ISO 817 and ASHRAE Standard 34 classification.

Non Flammable refrigerants (A1 Class) has been around for over 100 years

Its is covered by standard HSE and Building & Fire regulation & risk assesmment
There are no bans (except on sale of split systems with a total charge of less than 3kg by 2025 with
exemptions if there are technical or safety issues) .[see F-Gas ban]

Health and Safety Guidelines Apply to A2, A2L, A3 Class Flammable  Refrigerants NOT A1

FETA DSEAR Guideline

Dangerous Substances & 
Explosive Atmospheres

ATEX 2014/34/EU Guidelines

ATEX Workplace


BSEN 60079-10-1:2015

Hazardous Area
Control of
Ignition Sources


Labeling is mandatory 
and helps awarenes


Important:  F-Gas certification of engineers does not cover any competency on personal or project safety. It sets targets to reduce GWP of refrigerants. There are 3 classes of refrigerants engineers need to be competant to handle (A1, A2/A2L & A3). BSEN378 dictates project installation safety.

Warning signs on all Space Air literature for R32 to meet DSEAR Regulations

Q : Can an R32 system explode?  Watch this video (Diesel Effect)

Space Air website have more guidance and advice to ensure the correct and safe use of all LG AC equipment that utilises HFC R32 Refrigerants (an A2L Class - flammable).The following is bad marketing and deceptive by some major manufacturers:

See more info

Mitsubishi Electric announces R32 (A2L) risk assesment tools!

Important: This tool DOES NOT represent a LEGAL or CORRECT risk assesment document or meet UK Statutory Guidance & H&S 2016 no. 107 Statutory Instrument.

Calculation of concentration should be in accordance with: 

  1. BSEN378 Refrigerant charge limti (for any AC) is for displacement of oxygen, which is based on Room Volume

  2. Minimum Floor Area for fire/explosion risks as per LG Installation recomendations & OD Installation


Space Air Terms & Conditions