Complete AC Installation Guide for Dhaka Homes & Offices — What To Know Before, During, and After
Getting your AC installed correctly is just as important as buying the right one. Poor installation is responsible for a large share of early AC problems we see across Dhaka — from refrigerant leaks that appear within months to compressors that fail prematurely because the outdoor unit was placed somewhere with no airflow. This guide walks you through everything you should know about proper AC installation in Dhaka’s specific conditions.
Step 1 — Choose the Right AC Capacity for Your Room
The most important decision you make before installation is choosing the correct capacity. An undersized AC runs constantly and never reaches the set temperature. An oversized AC cools too quickly, cycles off before removing humidity properly, and leaves the room feeling damp and uncomfortable.
| Room Area | Recommended Capacity | Adjustment for Dhaka |
|---|---|---|
| Up to 120 sq ft | 0.75 Ton (9,000 BTU) | Add 0.25T for west-facing rooms |
| 120–180 sq ft | 1 Ton (12,000 BTU) | Standard bedrooms |
| 180–250 sq ft | 1.5 Ton (18,000 BTU) | Large bedroom or small living room |
| 250–350 sq ft | 2 Ton (24,000 BTU) | Living room / dining area |
| 350–500 sq ft | 2.5 Ton (30,000 BTU) | Open-plan living spaces |
| 500+ sq ft | 3+ Ton or multiple units | Offices, commercial spaces |
Add approximately 0.5 ton extra capacity for: rooms with large windows facing west, rooms directly under a roof exposed to full sun, rooms with many occupants, or commercial spaces with heat-generating equipment like computers.
Step 2 — Inverter vs Non-Inverter in Dhaka’s Climate
For Dhaka, where the AC typically runs 6–10 hours daily for 7–8 months of the year, inverter technology is almost always the better choice economically. The higher upfront cost is offset by electricity savings within 2–3 years. The only case where a non-inverter makes sense is for a rarely-used guest room or a space where the AC runs for less than 2 hours per day.
Step 3 — Indoor Unit Placement Rules
Where the indoor unit is mounted significantly affects how well the AC cools the room and how efficiently it operates.
Mount at 7–8 feet height
The indoor unit should be mounted high on the wall so cold air blows across the room at ceiling level and settles down naturally. Too high, and cold air never reaches where people are sitting. Too low, and occupants directly under the unit feel too cold while the far end of the room stays warm.
Center placement is ideal
Placing the indoor unit centrally on a longer wall distributes cold air evenly across the room. Avoid corners where airflow is blocked by adjacent walls.
Avoid these locations
Never install directly above a bed (users get hit with direct cold air), directly above a TV or electronics (condensation risk), or on an exterior wall where running the drainage pipe will be problematic.
Drainage must slope downward
The condensate drain pipe must run continuously downhill from the unit to the outside. If any section runs level or uphill, water will back up and drip inside the room — one of the most common AC complaints in Dhaka.
Step 4 — Outdoor Unit Placement Rules
The outdoor unit placement is critical and is often rushed during installation. A poorly placed outdoor unit reduces cooling efficiency and shortens compressor life.
- Must have at least 30 cm of clear space on all sides for airflow
- Never install in an enclosed cabinet, alcove, or under a closed awning — heat cannot escape
- Install in a shaded location if possible — a unit in full afternoon sun has to work harder
- Mount on a sturdy bracket or concrete pad — vibration on weak supports causes noise and loosens pipe connections over time
- Elevate above ground level in areas prone to flooding (important in many Dhaka neighborhoods during monsoon)
Step 5 — Piping Length and Quality
The copper piping that connects the indoor and outdoor unit is a component that cheap installation teams often cut corners on. This is a mistake that shows up as poor cooling, gas leaks, and compressor damage within 1–2 years.
Piping longer than 5 metres for a 1-ton AC requires additional refrigerant. If extra gas is not added to compensate for the longer pipe run, the system will run short on refrigerant from day one. Always ask the installation team whether additional gas has been accounted for on long pipe runs.
Step 6 — Electrical Requirements
Each AC needs a dedicated circuit with the correct wire gauge and a properly rated circuit breaker. The most common electrical problem we encounter in Dhaka is ACs sharing overloaded circuits, which causes breaker trips and overheating of wiring inside walls.
| AC Capacity | Min. Wire Gauge | Circuit Breaker | Socket Type |
|---|---|---|---|
| 0.75–1 Ton | 2.5 mm² | 16A | 16A dedicated socket |
| 1.5 Ton | 4 mm² | 20A | 20A dedicated socket |
| 2 Ton | 6 mm² | 25A | 25A dedicated socket |
| 2.5–3 Ton | 6–10 mm² | 32A | 32A dedicated circuit |
The Installation Process — What Should Happen
A proper AC installation in Dhaka takes 2–4 hours for a standard split unit. Here is what a professional installation should include:
- Site survey — measuring the room, checking wall strength, identifying pipe route, confirming electrical capacity
- Wall bracket installation for outdoor unit on secure masonry anchors
- Core drilling through the wall for pipe, drain, and cable
- Indoor unit mounting with level check
- Copper pipe and cable routing — properly insulated and secured
- Outdoor unit installation, refrigerant line connection, and nitrogen leak test
- Vacuum pump evacuation of the refrigerant lines (removes moisture and air) — this step is critical and often skipped by cheap installers
- Refrigerant valve opening and system startup
- Temperature and pressure verification
- Drainage function test
Ask your installer specifically whether they will vacuum pump the lines before charging. This step removes moisture from inside the copper pipes. Skipping it leads to acid contamination of the refrigerant, which destroys compressors over time. Any professional installer will include this step.
AC Installation Cost in Dhaka — What To Expect
| Installation Type | Typical Cost Range | Notes |
|---|---|---|
| Standard split AC (up to 3m pipe) | BDT 2,500–4,000 | Ground floor or easy access |
| High floor / difficult access | BDT 3,500–6,000 | Scaffolding or rope work may be needed |
| Long pipe run (5–10m) | Add BDT 1,000–2,000 | Extra pipe and additional gas charge |
| Commercial / cassette unit | BDT 5,000–15,000+ | Depending on unit size and complexity |
| New dedicated electrical circuit | BDT 1,500–3,500 | Required if existing wiring is inadequate |
Common Installation Mistakes That Cost You Later
- Skipping the vacuum process — moisture enters the refrigerant system and causes compressor damage within 1–2 years
- Using thin copper pipe to save cost — thin pipe cannot handle the refrigerant flow, causes pressure drops and poor cooling
- Outdoor unit in an enclosed space — the compressor overheats and fails prematurely
- No earth/grounding wire — electrical fault protection is missing; dangerous and can void insurance
- Drain pipe with upward sections — water backs up and drips inside, usually blamed on a “defective unit”
- Indoor unit too close to the ceiling — less than 15 cm gap prevents proper airflow into the unit
Need Professional AC Installation in Dhaka?
We install all brands of split, cassette, and window ACs across Dhaka City. Every installation includes proper vacuum pumping, drainage testing, and electrical safety checks. Available every day 8AM to 12AM.
Frequently Asked Questions
How long does AC installation take in Dhaka?
A standard split AC installation takes 2–4 hours for a qualified team. This includes mounting both units, running the pipe and cable, vacuum pumping, and testing. Difficult access, long pipe runs, or new electrical circuit work can extend this to 5–6 hours.
Does AC installation include the copper pipe and materials?
It depends on the installer. Some quote a labor-only price and charge separately for copper pipe, insulation, cable, drain hose, and wall brackets. Always ask for a complete itemized quote so you know exactly what is included before work begins.
Which side of the room should the AC indoor unit face?
Ideally, it should face the longest dimension of the room and be centered on the wall so airflow reaches all corners evenly. Avoid installing directly opposite a door — cold air will constantly be pulled out when the door opens.
Can I install my new AC myself in Bangladesh?
Not for split ACs. Split AC installation requires a vacuum pump, manifold gauge set, and refrigerant handling equipment that is not practical for DIY. Incorrect installation also typically voids the manufacturer warranty. Window ACs are simpler but still require correct electrical connections and proper sealing.