Euro R‑600a (Isobutane, HC)

Description

Euro R‑600a (isobutane) is employed almost exclusively in household fridges and small vending units. It provides excellent thermodynamic efficiency while maintaining minimal environmental impact, though it is flammable (A3 classification). 

Key Features:

• GWP ~3 and ODP = 0

• ASHRAE A3 classification (flammable)

• Very efficient for sealed, small-charge systems

• In widespread global use in refrigerators since ~2010

Specifications:

• Chemical formula: C₄H₁₀; typical charge size: under 150 g

• Non-toxic, odorless, and stable in sealed systems

Applications:

• Domestic refrigerators and freezers

• Beverage coolers, vending machines, minibar units

Usage:

• Use only in hermetically sealed systems designed to handle flammable refrigerants

• Strict limit on refrigerant quantities; explosion-proof components required

 FAQs:

1. Why is R‑600a popular in domestic fridges?
   Its high efficiency and negligible environmental footprint make it ideal for sealed small systems.

2. Is R‑600a dangerous?
   It is highly flammable. Devices must be designed, manufactured, and serviced to stringent safety standards.

3. Can existing systems be retrofitted to R‑600a?
   No—only systems specifically engineered for this refrigerant may use it.