Flammability: R32 has a lower flammability compared to R22 and R410A, making it a safer option for air conditioning systems. Toxicity: R32 is considered to be less toxic compared to R22 and R410A, but it should still be handled with caution to avoid potential harm to humans and the environment.
R32 is an hydrofluorocarbon compound which has zero ODP, which means it does not harm the ozone layer. Refrigerants are divided into two categories; Class A and Class B, based on toxicity. R32 falls under Class B, the non-toxic category. This means that it is safe for both humans and the environment.
Most of the common refrigerants used (R12, R22, R32, R410a, R134a, R1234yf, etc) aren't particularly toxic to breathe in lower concentrations. But just like any other gas, they will displace oxygen and can be very dangerous in an enclosed space.
Other hazards : Asphyxiant in high concentrations. These high concentrations are within the flammability range. Contact with liquid may cause cold burns/frostbite. The substance/mixture has no endocrine disrupting properties.
Regulatory - There are no published regulations or granted EPA petitions that state R-32 will be prohibited in the U.S. after 2029. In fact, R-32 is a single component refrigerant, while R-454B is a blend that consists of nearly 70% R-32.
R-32 is the most balanced refrigerant in terms of environmental impact, energy efficiency, safety, and cost-effectiveness. Refrigerant is a medium for conveying heat. Air conditioners transfer heat while circulating refrigerant between the indoor and outdoor units.
AC units manufactured since 2010 use R410A, and more recently, R32 refrigerants, both are virtually odourless. This means that a smell of rotten eggs is unlikely to be the smell of leaking refrigerant coming from your air conditioner itself.
Compared to all other Class A (Lower Toxicity) refrigerants such as R22, R410A, R134a, R290 (Propane) and R600a (Isobutane), R32 has the highest (safest) Acute Toxicity Exposure Limit (ATEL) of 220,000 ppm.
Ingestion: * Ingestion is unlikely due to the physical properties of the product. As product is a gas refer to inhalation section. Inhalation: * Inhalation may produce the following symptoms: Shortness of breath, dizziness, weakness, nausea, headache, narcosis, irregular cardiac activity.
Ammonia gives an unpalatable flavor to food. SO2 kills flowers and is a dying agent for textiles. Refrigerants have been assigned toxicity grades 1-6 by the National Board of Underwrites of the USA. SO2 is the most toxic.
However, R32 is not a drop-in replacement for R410A — and vice versa — because the two require different operating conditions.
What refrigerant will replace R-410A in 2025? For whole-home systems, Lennox has chosen 2025 Compliant Refrigerant R-454B due to its excellent performance for ducted systems and zero ozone depletion potential. For mini-splits, we selected R-32, designed to optimize efficiency and reliability in ductless systems.
Which gases are used in AC? R290 and R32 are both gases used in air conditioning units. They're also known as refrigerants, which means they help cool down your room by turning into liquids when pumped through the system. Compared to other gases such as R12, and R22, they are safer and environment-friendly to use.
Asphyxiation and freeze burns are also a risk. For transportation purposes, R32 is classified as a dangerous goods class 2.1 flammable gas under the Australian Dangerous Goods Code and therefore requires additional handling and storage safeguards compared to class 2.2 non-flammable gases.
Nitrogen Dioxide
NO2 is the most harmful of these compounds and is generated from the combustion of fuel engines and industry. It can damage the human heart and lungs and it reduces atmospheric visibility at high concentrations. Finally, it is a critical precursor to the formation of ground-level ozone.
The F-Gas regulations are a phase down (not out) of higher GWP refrigerants. R410A equipment will still be readily available to buy. R32 will be introduced and will run alongside R410A equipment for the coming years.
Research conducted to prepare the document confirms that R32 is NOT an extremely flammable, highly toxic gas that causes cancer (as some industry representatives have suggested).
Flammability: R32 has a lower flammability compared to R22 and R410A, making it a safer option for air conditioning systems. Toxicity: R32 is considered to be less toxic compared to R22 and R410A, but it should still be handled with caution to avoid potential harm to humans and the environment.
Toxic substances like hydrogen fluoride and carbon dioxide are created when R32, like all fluorinated refrigerants, is burnt. Asphyxiation and freeze burns are also a risk.
CFCs and HCFCs are the most harmful because they contain chlorine. These refrigerants are also relatively stable, meaning they don't get destroyed easily by rain or sunlight. This makes it more likely that they will reach the stratosphere, where the ozone layer is.
R-32, also known as HFC-32, is an organic hydrofluorocarbon compound with the formula CH₂F₂. It's a colorless odorless, mildly flammable gas which is insoluble in water. Some of its properties are contained in the table below.
Modern refrigerators usually use a refrigerant called HFC-134a (1,1,1,2-Tetrafluoroethane), which, unlike CFCs, does not deplete the ozone layer, although it still is a quite potent greenhouse gas. HFC-134a is becoming much rarer in Europe, where newer refrigerants are being used instead.
How well a person does depends on the severity of the poisoning and how quickly medical help was received. Severe lung damage may occur. Survival past 72 hours usually means the person will have a complete recovery. Sniffing Freon is extremely dangerous and can lead to long-term brain damage and sudden death.
Disadvantages:Different from R22 and R410A, the R32 is slightly flammable. But combustion will not occur unless three critical conditions are met, refrigerant concentration, constant oxygen, and an ignition source. In real practice, it's hard to meet all the combustion conditions.
A sweet, syrupy smell could be a sign of a coolant leak from your HVAC system or refrigerator. Coolants used in air conditioning such as ethylene glycol can be toxic if inhaled or ingested.