Is your AC running but the room still feels warm? In most cases, the culprit is low refrigerant — and you are probably wondering how much AC gas charging is going to cost you in Kolkata.
The honest answer: it depends on your AC type, gas type, and whether there is a leak. But to give you a clear picture before you call anyone, we have put together this complete price guide based on current Kolkata market rates.
We are Unique Aircon — a certified AC service team based in Jadavpur, serving South and Central Kolkata for 9+ years. We share these prices openly because we believe you deserve to know what you are paying for before a technician even steps through your door.
AC Gas Charging Cost in Kolkata — Quick Price Table
Use this table to get a quick estimate before calling a technician. Prices are based on current Kolkata market rates as of 2026.
| AC Type & Tonnage |
Gas Top-Up (partial) |
Full Gas Refill |
| Split AC — 1.0 Ton |
₹1,500 – ₹2,000 |
₹2,200 – ₹3,000 |
| Split AC — 1.5 Ton |
₹1,800 – ₹2,500 |
₹2,500 – ₹3,500 |
| Split AC — 2.0 Ton |
₹2,200 – ₹3,000 |
₹3,000 – ₹4,500 |
| Window AC — 1.0 Ton |
₹1,200 – ₹1,800 |
₹1,800 – ₹2,800 |
| Window AC — 1.5 Ton |
₹1,500 – ₹2,200 |
₹2,000 – ₹3,200 |
⚠ Note: These are standard Kolkata market rates as of 2026. Final price depends on gas type (R22, R32, R410A), your AC's condition, and whether a leak needs to be repaired first. A genuine technician will always check gas pressure with a manifold gauge before recommending a refill.
What is AC Gas Charging?
AC gas charging — also called gas refilling or gas top-up — is the process of replenishing the refrigerant inside your air conditioner. Refrigerant is the substance that absorbs heat from inside your room and releases it outside, creating the cooling effect.
Here is something most people do not know: refrigerant gas does not get used up during normal operation. It circulates in a sealed loop. If your AC needs gas, it almost always means there is a leak somewhere in the system. A good technician will find and fix that leak before refilling — otherwise you will be paying for gas refills every season.
Types of Refrigerant Gas and Their Cost in Kolkata
The type of gas your AC uses is the single biggest factor in the overall cost. Here is what is commonly used in Kolkata:
R32
Most common · 2018+
The most common refrigerant in new split ACs today. Eco-friendly, efficient, runs at moderate pressure.
≈ ₹600 – ₹900 per kg
R410A
Common · 2010–2020
Widely used in older split ACs. Zero ozone depletion but requires higher system pressure to handle correctly.
≈ ₹700 – ₹1,000 per kg
R22
Legacy · Being phased out
Older ACs use R22 (Freon). Being phased out due to ozone depletion. Harder to source in Kolkata now.
≈ ₹800 – ₹1,200 per kg
What is Included in the AC Gas Charging Service?
When you book a gas charging service with a reputable provider in Kolkata, here is what the visit should include:
1
Inspection and diagnosis
The technician checks why the gas level is low. Is there a visible leak? Is the pressure drop slow or rapid? This step is essential and must not be skipped.
2
Leak detection and repair
If a leak is found, it must be repaired before new gas is added. Leak repair typically adds ₹500–₹2,000 to the bill depending on the location and severity.
3
Vacuuming the system
Before refilling, the system must be evacuated of any moisture or air. Skipping this step shortens the life of your compressor significantly.
4
Gas refill to correct pressure
Using a manifold gauge, the technician fills refrigerant to the manufacturer's specified pressure — not by feel or guesswork.
5
Performance test
After refilling, the AC is run for 10–15 minutes to confirm outlet air temperature has dropped at least 15–20°C compared to room temperature.
5 Signs Your AC Needs Gas Charging
You may not need to guess — your AC usually tells you when the refrigerant is low:
1
AC is running but not cooling the room — The fan blows air, the compressor is on, but the room stays warm. In Kolkata's humid summer, this is impossible to ignore.
2
Ice forming on the copper pipes or indoor unit — Low refrigerant causes pressure to drop, making the evaporator coil freeze. You may see frost or dripping water on the indoor unit.
3
AC takes much longer than usual to cool the room — If a room that used to cool in 20 minutes now takes an hour, reduced gas pressure is a likely cause.
4
Hissing or bubbling sound from the unit — These sounds can indicate refrigerant leaking from a valve, joint, or pipe.
5
Electricity bills going up without more usage — A low-gas AC works harder to compensate, drawing more power than it should.
How to Avoid Getting Overcharged for AC Gas Refill in Kolkata
Gas refilling is one of the services where some technicians charge more than they should. Here is how to protect yourself:
✓
Ask what type of gas your AC uses before calling anyone. Check the sticker on the back of your indoor unit — it will mention the refrigerant type (R32, R410A, or R22). This way you can cross-check the quote.
✓
Insist on a pressure check first. A genuine technician will use a manifold gauge before deciding whether you need a top-up or a full refill. A recommendation for full refill without a pressure check is a red flag.
✓
Do not pay for a refill if the leak is not fixed first. Refilling without fixing the leak is like filling a punctured tyre with air. Ask specifically: "Are you fixing the leak first?"
✓
Get a price breakdown before the work starts. A trustworthy provider will tell you upfront: inspection fee, gas cost per kg, labour charge, and any leak repair cost. Hidden charges after the job are a sign of a poor operator.
How Much Does AC Gas Charging Cost at Unique Aircon?
At Unique Aircon, we charge transparently with no hidden fees. Here is exactly what you pay:
Unique Aircon — Gas Charging Price List (Kolkata, 2026)
Inspection / gas pressure check
Included in visit
Gas top-up — R32 / R410A (partial)
From ₹1,500
Full gas refill — 1.5-ton split AC (vacuum + recharge)
From ₹2,500
Leak detection and repair
₹500 – ₹1,800
Service visit / labour charges
Included — no surprises
Final price confirmed before any work begins. Certified technicians · Genuine refrigerant · 30-day service warranty.
Jadavpur
Garia
Tollygunge
Ballygunge
Kasba
Santoshpur
Behala
Dhakuria
Mukundapur
Ruby
Sonarpur
Bhawanipore
Frequently Asked Questions
Q
How long does AC gas last?
In a well-maintained AC with no leaks, the refrigerant should last the entire lifespan of the unit — typically 10–15 years. It circulates in a sealed loop and is not consumed during use. If you need gas refilled every year, you have a leak that needs to be found and fixed permanently.
Q
Can I check AC gas level at home?
You cannot measure gas pressure accurately without a manifold gauge. However, you can do a basic check: feel the thicker copper pipe coming out of the outdoor unit — it should be cold and slightly moist. If it is warm or dry, gas pressure is likely low. Call a technician for a proper reading.
Q
Is R22 gas still available in Kolkata?
Yes, but it is being phased out and availability is shrinking. If your AC uses R22 and needs frequent refills, it may be more economical to upgrade to a newer model that uses R32 — especially given Kolkata's long summer cooling season.
Q
What happens if I ignore low gas in my AC?
Low refrigerant forces the compressor to overwork, which leads to overheating and eventual compressor failure. A compressor replacement in Kolkata costs ₹6,000–₹18,000 depending on the brand — far more expensive than a timely gas refill. Do not delay.
Q
Does gas charging fix AC water leakage?
Not directly, but low gas can cause the evaporator coil to freeze, which then melts and drips water into the room. If ice formation is causing the leak, restoring the correct gas pressure will resolve it. Water leakage from other causes — blocked drain pipe or tilted indoor unit — requires separate attention.
Book AC Gas Charging Service in Kolkata
Same-day service · Transparent pricing · Certified technicians across South & Central Kolkata
📍 3/87 C. R. Colony, Jadavpur, Kolkata – 700032
Jadavpur · Garia · Tollygunge · Ballygunge · Kasba · Santoshpur · Behala · Dhakuria · Jodhpur Park · Mukundapur · Anandapur · Sonarpur · Ruby · Bhawanipore
Last updated: June 2026 · Written by the Unique Aircon technical team, Kolkata
