A2L (flammable) HFC R32 Refrigerant



What is A2L (flammable) HFC R32? Is it worth it? Is it Legal?

In 2015, HFC 32, Introduced (1st flammable refrigerant in the AC industry since 1928 ) as a Short Term, Single Component, with Low GWP,(675) to relace current safe NON-flammble R410A with High GWP (2088).


 R32 is flammable, and requires: 

Manufacturers / Authorised Representative / Importers / Distributor / Specifiers / Installers






- Manufacturers, Authorised Representatives, Importers and Distributors are under Duty & Obligations to meet the following:


- Manufacturers can follow " Code of practice on consumer product safety related recalls and other corrective actions 


- Clear Labelling, Installation & Operation instructions must conform & compliance and warnings

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




Building Managers


- 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 and user awareness

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 dicipline maintenance.

- AC equipment selection for any Building needs to take account the long term servicibility and availability of spares and long term refrigerant availability.. e.g. R410A non flammable willl be at least till 2040





Installers, Designers, Building Managers and Owners responsibility fall under 

     a) Written confirmation from Manufacturers, Distributors, importers that products containing flammable R32 meets H&S 2016 no.1107 & meets Code of Practice PAS 7100

    b) Installation & maintenance meets the following manufacturers recommendations


    c) Installer are qulified and certified to handle (A2/A2L) flammable refrigerants e.g. City & Guilds 6187-21   (in addition to City & Guilds 2079-11,12) 


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


-Space Air have been distributing AC equipment since 1980 and have followed all local, National & International Standrds, Dirctive and ISO Standards. The introduction by manufacturers of flammable refrigerent in 2015 by Daikin have created instability in our industry. Space Air have obligations under H&S 2016 no.1107 to inform the MArket Survailance Authority, the manufacturer and the advertising Authority.


-The restriction in the supply of A1 class R410A for small splits is only in the UK!. is unethical and illigal while countries like France (largest sale of Heat Pumps systems of over 1 million Europe) heavily restricts the use of any flammables in Public Buildings & insist on safer options. 

-Same manufacturers operating in the UK supply R410A everywhere in the world! Why NOT in the UK? it is an illigal Business Cartel forcing flammable refrigerants in Domestic & Public Buildings that does not meet safety and CE regulations

-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.

-The Montreal Protocole / Kigali Amendment (International adopted by 197 Countries including UK) will replace the EU political guidelines, in international effort in the reduction of HFC phase down (A1 & A2L). see Extract EPEE presentation     

- 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 safty proccedures. 

-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 an 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 industry by Daikin! in 2012/Japan, 2015 in EU/UK


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


Government Study of the impact of high GWP refrigerants in Heat Pumps concluded that the carbon benefit of displacing fossil fuels was around 17 times higher than the impact of refrigerant leaks.

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 awarene

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 regulations & directives

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:


Calculation of refrigerant R32 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 


Space Air Terms & Conditions