Every split-unit air conditioner installation in a concrete-walled home or apartment in Kerala requires a hole through the wall for the copper refrigerant pipes, electrical cable, and condensate drain line. The way that hole is made matters significantly — both for the quality of the installation and the safety of your wall.
The standard AC pipe hole through a concrete wall is 75mm to 100mm in diameter. Diamond core cutting is the only method that achieves this cleanly without cracking the surrounding wall.
What size hole for AC installation?
For a standard 1–2 ton split unit, the pipe set (refrigerant pipes + drain + cable) typically passes through a single hole. Recommended hole sizes:
Why not use a hammer drill?
Many AC technicians in Kerala still use a rotary hammer drill with a masonry bit to make the pipe hole. On brick walls and thin plaster, this can work adequately. But on concrete and RCC walls — which is the standard for most modern Kerala homes — hammer drilling causes serious problems:
- Problem: Irregular, rough hole
Effect: Pipe sleeve doesn't seal cleanly — insects, water, and air leakage - Problem: High vibration
Effect: Adjacent wall tiles and plaster can crack or debond — expensive to repair - Problem: Oversize hole
Effect: Multiple attempts leave an irregular, too-large opening - Problem: Structural micro-cracking
Effect: Impact force creates micro-cracks in concrete around the hole
Core cutting: the right approach
Diamond core cutting uses a water-cooled hollow diamond bit spinning at high rpm to cut a perfectly circular hole of exactly the specified diameter. The process for an AC pipe hole typically takes 15–20 minutes per hole and leaves a smooth, clean-edged bore that the pipe sleeve fits precisely.
Key advantages for AC installations:
- Exactly the right diameter — pipe sleeve fits snugly without gaps
- Smooth edges — no sharp concrete shards that damage the pipe insulation
- Zero vibration — no tile or plaster damage near the unit location
- Can cut through full RCC walls with rebar without difficulty
- Slight downward angle achievable — helps condensate drain outward
Angled drilling for drainage
A common best practice for AC pipe holes is to drill at a slight downward angle toward the outside (about 5–10°). This ensures the condensate drain flows outward naturally without relying solely on the flexible drain hose routing. Diamond core drills can be adjusted for any angle — our operators set the exact angle you specify.
Cost of AC pipe hole in Palakkad
* For 5+ holes in the same visit, we offer package pricing. Most apartment complexes with 10+ units get discounted bulk rates.
Can you book us directly with your AC technician?
Yes — we regularly coordinate with AC installation teams in Palakkad and across Kerala. The sequence is typically: AC technician marks the pipe hole location → we core drill the hole → AC technician installs the unit and routes the pipes through. The coordination adds an hour or two to the installation day but results in a much cleaner, more professional job.
For builders and developers fitting out multiple apartments, we can schedule bulk core cutting for all AC holes across an entire floor or building in a single day — significantly faster than sending individual technicians to drill each room separately.
BOOK AC PIPE HOLE DRILLING
Core cutting in Palakkad & Kerala.
Single holes or bulk building fit-outs. Call or WhatsApp for same-day or next-day service.