Refrigerant gas (also called refrigerant or freon) is the lifeblood of every cooling system. From your home fridge to massive industrial freezers, it all runs on this magic fluid. Looking for 2025 refrigerant prices, leak symptoms, proper charging steps, or green alternatives?
How Does Refrigerant Gas Actually Work?
Think of it as a heat shuttle on a loop:
| Step | What Happens | Result |
|---|---|---|
| 1. Compressor | Squeezes low-pressure gas | Hot + high-pressure |
| 2. Condenser | Dumps heat outside | Turns into liquid |
| 3. Expansion Valve | Drops pressure fast | Super-cold liquid |
| 4. Evaporator | Absorbs indoor heat | Back to gas |
Top search: refrigerant cycle explained, how freon cools
Top Refrigerants in Iran Market (October 2025)
| Gas | Main Use | GWP | 2025 Status | Price per kg (IRR) |
|---|---|---|---|---|
| R-134a | Fridge, car AC | 1,430 | Allowed until 2030 | 85,000 – 95,000 |
| R-410A | Split AC units | 2,088 | Phasing out | 155,000 – 170,000 |
| R-32 | Next-gen ACs | 675 | Encouraged | 135,000 – 145,000 |
| R-404A | Cold storage | 3,922 | Banned in new systems | 175,000 – 190,000 |
| R-600a | Home fridges | 3 | Factory standard | 115,000 – 125,000 |
Pro tip: 100g R-410A leak = 208 kg CO₂ in the atmosphere!
5 Clear Signs Your System is Low on Refrigerant
- Frost patches on evaporator coils
- Compressor running hot (even at night)
- Weak cooling despite max fan speed
- Hissing or gurgling from compressor
- Oil stains near service valves
Related searches: AC not cooling gas low, fridge frost but warm
Refrigerant Charging: 6 Steps Only Pros Should Do
⚠️ Never DIY – risk of fire or compressor burnout.
| Step | Action | Tool |
|---|---|---|
| 1 | Recover old gas | Recovery machine |
| 2 | Deep vacuum | Digital vacuum pump |
| 3 | Leak test | Dry nitrogen + soap |
| 4 | Add correct oil | POE / PVE |
| 5 | Charge by weight | Digital scale |
| 6 | Log charge amount | Service form |
Standard Charge Amounts (Examples)
| Unit | Gas | Amount |
|---|---|---|
| 18,000 BTU Gree AC | R-410A | 1.1 – 1.3 kg |
| 26 cu.ft Daewoo fridge | R-134a | 160 – 180 g |
| 400L chest freezer | R-404A | 850 – 950 g |
Future of Refrigerants: Green, Cheap, Efficient
Per Iran’s new EPA rule (Aug 2024):
- ❌ R-404A banned in new installs
- ✅ R-32 & R-290 get tax breaks
- 🌱 CO₂ (R-744) in chain supermarkets
| Green Gas | GWP | Best For |
|---|---|---|
| R-744 | 1 | Supermarkets |
| R-717 | 0 | Large industry |
| R-1234yf | 4 | 2025+ car AC |
How to Buy Genuine Refrigerant? (Anti-Fake Checklist)
| Genuine | Fake |
|---|---|
| Gray DOT-39 cylinder | Odd colors |
| Brass valve + factory seal | Plastic valve |
| Barcode + serial | No label |
| COA certificate | Only invoice |
Best buy spots in Tehran: Reza Market, Jomhouri St., SamSarma dealers
Full Cylinder Prices (Oct 2025):
- R-134a (13.6 kg): IRR 1,180,000
- R-410A (11.4 kg): IRR 1,780,000
FAQ – Most Asked Questions
Is R22 still available?
Yes, only for repairs. New production banned.
Can I swap R410A with R32?
Never! Different pressure = burned compressor.
How often does a fridge need recharging?
Never, if no leaks. Low gas = mechanical fault.
Final Word: Smart Gas = Save Money, Save Earth
Refrigerant isn’t just “a can of gas.” Pick the right one and get:
- ✅ 30% lower electricity bill
- ✅ 5+ extra years from your unit
- ✅ Zero eco fines
