AC Installation
in Karachi
Professional Fitting by Karachi Repairs
Buying a new air conditioner is only half the job done. How it's installed decides almost everything that comes after — how well it cools, how much electricity it consumes, how long it lasts, and whether you'll be calling a technician again in six months for a problem that shouldn't have happened in the first place. In Karachi, we've lost count of how many "AC repair" calls turn out to be installation mistakes made by someone who was in a hurry to finish the job and move to the next customer.
At Karachi Repairs, AC installation is treated as a proper technical job, not a quick fitting task. Our technicians follow manufacturer guidelines, check the structural and electrical requirements of your space, and make sure the unit is positioned for maximum cooling efficiency before a single screw goes into the wall. This page explains exactly what our installation service includes, what to expect on the day, and why getting this step right matters more than most people realise.
AC installation is part of our complete HVAC Services in Karachi, alongside repair, gas refilling, and full system servicing for homes and businesses.
Same-Day Response AC Installation
Purchased a new AC or moving it to a new location? Tell us the address and your AC type. Our expert technicians usually reach you within 1 to 2 hours anywhere in Karachi, fully equipped for safe and reliable fitting.
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Types of AC Installation
We Handle
Our technicians are equipped to install every common type of air conditioner used across Karachi homes, offices, and commercial spaces.
Split AC Installation: The most requested installation type in Karachi. This involves mounting the indoor unit on an interior wall, positioning the outdoor condenser unit, running copper piping and drainage lines between the two, and completing the electrical connection safely.
Inverter AC Installation: Inverter units require more precise handling because of their sensitive PCB and communication wiring between indoor and outdoor units. Incorrect wiring polarity or a poor electrical earth connection can damage the control board almost immediately, so our technicians follow strict checklists for these installations.
Window AC Installation: Still common in smaller shops, single rooms, and older buildings. This requires proper structural support at the window or wall opening, correct sealing to prevent air leakage, and safe electrical connection given these units often draw significant current.
Ducted and Central AC Installation: For larger homes and commercial spaces, ducted systems require careful duct routing, insulation, and airflow balancing across multiple rooms or zones. This is a bigger project that typically needs a site visit and planning before installation day.
Cassette and Ceiling-Mounted AC Installation: Common in offices, showrooms, and restaurants, these units are installed within a false ceiling and require careful positioning for even airflow distribution and access to piping and drainage above the ceiling line.
AC Installation for Homes vs Offices
What's Different
Residential and commercial AC installations often need a different approach, and our teams plan accordingly.
In homes, the focus is usually a straightforward single or dual-unit installation, completed within a few hours, with attention to keeping the indoor unit's placement aesthetically appropriate for the room while maintaining optimal cooling performance.
In offices, restaurants, clinics, and retail spaces, installations often involve multiple units, coordination around business hours to minimise disruption, and sometimes ducted or cassette systems that require more planning around false ceilings and existing electrical infrastructure. For larger commercial projects, we recommend booking a site visit in advance so we can plan the full installation properly rather than working it out on the day.
Choosing the Right AC Before Installation
We often get calls from customers asking us to recommend the right tonnage and type before they even purchase the unit, and it's worth getting this right before installation day rather than after.
Room Size and Tonnage
A rough guideline commonly used in Pakistan is around one ton of cooling capacity for every 120 to 150 square feet of room space, though this varies with ceiling height, window size, and how much direct sunlight the room receives during the day. A room with large west-facing windows in Karachi's heat will need more cooling capacity than a similarly sized interior room.
Inverter vs Non-Inverter
Inverter units cost more upfront but consume noticeably less electricity over time because they adjust compressor speed based on cooling demand rather than switching fully on and off. For rooms used for long hours daily, the electricity savings usually justify the higher initial cost within a couple of cooling seasons.
Outdoor Unit Placement Options
Before buying, it's worth considering where the outdoor unit will realistically go. Balconies, external walls, and rooftop placements all have different piping length requirements, and longer piping runs can slightly affect cooling efficiency if not properly insulated.
Best Time of Year to Install
a New AC in Karachi
A lot of people wait until the first heatwave hits before thinking about installing a new AC, and that's usually the worst time to do it. Once summer starts, technicians across the city get booked out days in advance, spare parts and standard mounting hardware sometimes run short, and rushed installations become more common simply because everyone is trying to get units up and running at the same time.
The smarter window is late winter or early spring, roughly between January and March, before the demand surge begins. Installing during this period means our technicians can take their time with the site assessment, electrical checks, and testing, without the pressure of a queue of emergency bookings behind them. It also means your AC is fully tested and ready well before the first genuinely hot day arrives.
That said, we understand this isn't always practical — sometimes a unit fails or a family moves into a new home in the middle of summer, and the AC simply has to go in immediately. Our teams handle installations year-round regardless of season, but if you have the flexibility to plan ahead, an off-season booking tends to be a smoother experience.
Important Installation & Maintenance Considerations
Where Should the Outdoor Unit Go? A Question We Get Asked Constantly, and Post-Installation Care for the First Few Weeks With a New AC.
Avoid Direct, Prolonged Sunlight
An outdoor unit sitting in direct afternoon sun all day has to work harder to release heat, which reduces overall cooling efficiency. Where possible, we try to position it somewhere with at least partial shade, or suggest a simple shade cover if the only available spot faces direct sun.
Leave Enough Clearance
The unit needs open space on at least two sides for proper airflow. Cramming it into a tight corner between walls restricts heat dissipation and forces the compressor to run longer than necessary.
Consider Noise and Neighbours
In densely built areas common across Karachi, outdoor units placed too close to a neighbour's window or bedroom wall can become a source of complaints. We try to factor this in during the site assessment rather than leaving it as an afterthought.
Balcony vs Wall Bracket vs Rooftop
Each option has trade-offs. A balcony placement is usually the easiest to service later, a wall bracket saves floor space but requires solid wall structure and secure mounting, and rooftop placement works well for ducted systems but adds piping length and sometimes needs additional weatherproofing.
Run It Through a Few Full Cycles
In the first week, let the AC run through complete cooling cycles rather than switching it on and off constantly. This helps you notice if it's reaching the set temperature at a reasonable pace, which is a good early indicator that gas charging and airflow were handled correctly.
Check for Any Water Marks
Keep an eye on the wall and floor area below the indoor unit for the first couple of weeks. Any dampness or water marks usually point to a drainage angle issue, which is much easier to correct while it's still a new installation than after it's caused wall damage.
Listen for Unusual Sounds
A newly installed AC should run quietly. If you notice rattling, buzzing, or a knocking sound from either the indoor or outdoor unit within the first few days, call us back — this is covered under our installation warranty and is far easier to fix early.
Keep the Filter Clean From the Start
Karachi's dust builds up faster than people expect, even on a new unit. Get into the habit of checking and rinsing the filter every couple of weeks from the beginning rather than waiting for cooling to drop before thinking about it.
Note Down Your Electricity Usage
If you're switching from an old unit to a new inverter AC, keep a rough note of your electricity bill for the first month or two. This gives you a real before-and-after comparison and helps confirm the unit is running as efficiently as it should be.
What Makes Karachi Repairs Different For AC Installation
Trained, Verified Technicians
Every technician carrying out installation work for Karachi Repairs has been checked for both technical skill and reliability before joining our team. We don't send unverified labour to handle electrical wiring and gas charging in your home.
Correct Tools, Not Shortcuts
Proper AC installation requires a vacuum pump, gauge manifold, pipe cutter and flaring tool, and a digital multimeter — not just a drill and a spanner. Our teams carry the right equipment for every job rather than improvising with whatever's available.
Transparent Pricing Before Work Begins
You'll be given a clear cost estimate covering labour, piping, and any additional materials before installation starts, based on your unit's tonnage, the distance between indoor and outdoor units, and the complexity of the site.
Installation Warranty
Our installation work comes with a service warranty period. If an installation-related issue comes up shortly after — a leak at a joint, a drainage problem, or a wiring fault — we return and fix it without charging labour again.
Same-Day Installation Where Possible
If you've already purchased your AC and just need it fitted, most standard split AC installations booked in the morning can be completed the same day, subject to site complexity.
Service for Homes, Offices, and Commercial Projects
From a single split AC in a bedroom to multi-unit installations across an entire office floor or retail outlet, our teams handle both small residential jobs and larger commercial installation projects.
Common Installation Mistakes We Fix Later
A significant portion of our repair calls trace back to installation problems from months or years earlier. Here are the most frequent ones we encounter.
Incorrect Refrigerant Charging
Overcharging or undercharging refrigerant gas during installation causes the unit to either underperform or put unnecessary strain on the compressor, often not becoming obvious until months later when cooling starts to noticeably drop.
Poor Drainage Pipe Angling
If the drainage pipe isn't angled correctly during installation, water can pool inside the indoor unit or drip back into the room, leading to water damage on walls and ceilings that could have been avoided entirely.
Excess or Poorly Insulated Piping
Some installers leave excess coiled piping behind the indoor unit instead of cutting it to the correct length, or skip proper insulation, both of which reduce cooling efficiency and increase electricity consumption.
Weak Outdoor Unit Mounting
An outdoor unit mounted on a weak or improperly secured bracket can vibrate excessively, become noisy over time, or in worse cases, become a safety hazard, especially on upper floors or balconies.
Skipping the Vacuuming Step
Not vacuuming the pipeline before gas charging leaves moisture and air inside the system, which is one of the most common reasons compressors fail earlier than they should.
Our AC Installation Process, Step by Step
We've refined our installation process over years of doing this across Karachi's different building types — from older bungalows to modern apartment towers — and here's exactly how it works.
Step 1 – Booking and Initial Details
Call us at 0332-6678611 and tell us the AC brand, tonnage, and type you've purchased (or plan to purchase), along with your area. This helps us send a technician equipped with the right tools and mounting hardware for your specific unit.
Step 2 – Site Assessment
Before drilling anything, our technician assesses the wall structure, checks for existing electrical wiring or plumbing behind the intended drilling spot, and confirms the best location for both the indoor and outdoor units based on airflow, sunlight exposure, and distance between the two.
Step 3 – Electrical Check
We verify that your existing electrical point can safely handle the AC's load, check the earthing connection, and recommend a dedicated circuit breaker if your current setup isn't sufficient. This step alone prevents a huge number of future electrical faults.
Step 4 – Mounting the Indoor and Outdoor Units
The indoor unit is mounted on a properly leveled bracket, and the outdoor unit is placed on a stable stand or bracket with enough clearance for airflow. Positioning here affects both cooling performance and noise levels inside the room.
Step 5 – Piping, Drainage, and Wiring
Copper piping is cut to the correct length and properly insulated to prevent energy loss, the drainage pipe is angled correctly to avoid water pooling or leakage, and electrical wiring is connected following the manufacturer's exact specifications.
Step 6 – Vacuuming and Gas Charging
Before releasing refrigerant into the system, we vacuum the pipeline to remove air and moisture, which is one of the most commonly skipped steps by untrained installers and a major cause of early compressor failure. Gas is then charged to the exact pressure specified for your unit's tonnage.
Step 7 – Testing and Final Walkthrough
Once installed, we run the unit through a full test cycle, check cooling output, inspect for any refrigerant leaks at the joints, confirm drainage is working properly, and walk you through basic operation and care instructions before we leave.
Things to Check Before Your AC Installation Day
A little preparation on your end can make the installation smoother and faster. Here's what we recommend checking before our team arrives.
What Happens If You Skip Professional Installation
We occasionally get calls from customers who had their AC "installed" by a general electrician or handyman to save money upfront, only to run into problems within weeks. It's worth being honest about what usually goes wrong in these cases.
Without proper vacuuming equipment, moisture stays trapped in the refrigerant line, which slowly corrodes internal components and shortens compressor life. Without a gauge manifold, refrigerant is often charged by guesswork rather than exact pressure readings, leading to a unit that either underperforms from day one or develops a leak within months. Loose electrical connections made without proper testing can trip breakers repeatedly or, in worse cases, create a fire risk.
The cost difference between a rushed, informal installation and a proper technical one is usually smaller than people expect, especially once you account for the repairs and electricity waste that typically follow a bad installation within the first year.
Book Your AC Installation With Karachi Repairs Today
A new AC is a real investment, and the only way to actually get the performance and lifespan you're paying for is a proper, careful installation from someone who knows what they're doing. Our teams are positioned across Karachi specifically so we can reach you quickly, install your unit correctly the first time, and stand behind the work with a real warranty.
Call or WhatsApp us now at 0332-6678611, or explore our complete range of HVAC Services for repair, gas refilling, and full system maintenance.
Areas We Cover Across Karachi
Karachi Repairs provides AC installation services across the city, including but not limited to Clifton, DHA (all phases), Gulshan-e-Iqbal, Gulistan-e-Johar, North Nazimabad, Nazimabad, Federal B Area, PECHS, Bahadurabad, Malir, Korangi, Landhi, Saddar, Garden, North Karachi, Shah Faisal Colony, and surrounding neighbourhoods. If you're unsure whether we cover your specific area, call us and we'll confirm coverage along with the expected arrival time of our nearest team.
Frequently Asked Questions About AC Installation
How fast can Karachi Repairs reach my location for installation?
We maintain teams stationed across different areas of Karachi, so in most cases our nearest available technician can reach you within 30 minutes of your call, depending on your exact location and time of day.
Do you install all AC brands and types?
Yes. Our technicians are trained to install all major brands sold in Pakistan, including Haier, Gree, Dawlance, Orient, PEL, Samsung, LG, TCL, and Kenwood, across split, inverter, window, ducted, and cassette systems.
How long does a standard split AC installation take?
A standard split AC installation usually takes between two and four hours depending on piping distance, wall type, and whether additional electrical work is needed. Ducted and multi-unit commercial installations take longer and are usually scheduled after a site visit.
Do you provide installation for units I've already purchased elsewhere?
Yes, we install units regardless of where you purchased them. Just share the brand, model, and tonnage when booking so our technician arrives prepared with the right hardware.
Is there a warranty on your installation work?
Yes, our installation work comes with a service warranty period. If an installation-related issue such as a leak or drainage problem occurs shortly after, we return and fix it without an additional labour charge.
Will installation affect my AC's manufacturer warranty?
Most manufacturers require installation by a competent technician for the warranty to remain valid, and our installations follow manufacturer specifications to keep your unit's warranty intact.
Do you charge for a site visit before installation?
For standard split AC installations, we provide a clear cost estimate over the phone based on the details you share. For larger ducted or commercial projects, a site visit may be recommended, which we'll discuss with you in advance.
Do you handle installation for offices and commercial spaces?
Yes, we install AC units in homes, offices, clinics, restaurants, and retail spaces across Karachi, including multi-unit and ducted system installations for larger commercial projects.
Areas We Cover
Across Karachi
Our technicians are spread across the city rather than run from one workshop, which is how same-day response stays possible in Karachi traffic.