R-454B
R-454B is a refrigerant blend with a lower global warming potential, providing a more eco-friendly option for HVAC systems.
What Is Refrigerant?
Refrigerant is a chemical fluid used in HVAC systems to absorb and release heat, cooling the air as it cycles through the system. The refrigerant changes from liquid to gas and back again during this process, allowing it to transfer heat effectively.
Why the Change to R-454B?
Traditional refrigerants, like R-22 and R-410A, contained hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), which were found to harm the ozone layer or contribute significantly to global warming. Environmental regulations now mandate the use of refrigerants with lower global warming potentials (GWPs), leading to the phase-out of HCFCs and HFCs.
What Is R-454B?
R-454B is a new, eco-friendly refrigerant blend of R-32 (an HFC) and R-1234yf (an HFO). It is intended to replace R-410A in newer HVAC systems. R-454B has a much lower climate impact due to its reduced GWP, making it more environmentally sustainable.
Environmental Impact of R-454B
- No Ozone Depletion Potential (ODP): R-454B has zero ODP, meaning it does not harm the ozone layer.
- Lower Global Warming Potential (GWP): Its GWP is over 75% lower than that of R-410A, meeting and exceeding EPA standards.
- Energy Efficiency: Systems using R-454B tend to operate more efficiently, which further reduces greenhouse gas emissions from energy use.
How to Identify Your HVAC Refrigerant
If your HVAC system was installed before 2010, it likely uses R-22, while systems manufactured after 2010 commonly use R-410A. The refrigerant type is usually specified on the unit’s data plate, which is typically located near the refrigerant lines or on the unit’s side. You can also consult your system’s manual or ask your HVAC technician to verify the refrigerant type.
Servicing Older Systems
Although older refrigerants like R-22 are being phased out, stockpiled supplies allow for continued servicing of existing systems. However, when the time comes to replace an aging system, R-454B is likely to be the new standard, offering a more sustainable and energy-efficient option.
