Can the installer reuse my old piping when replacing the unit?

Sometimes, if the copper is in good condition and sized correctly for the new unit's refrigerant. Many installers still recommend new piping for older systems to avoid leaks and efficiency loss.

Do I need a bigger unit if I'm replacing an old one?

Not necessarily, but it's worth rechecking the room's BTU requirement since old units are sometimes under or oversized for the space.

What happens to the old aircon unit and its gas?

A proper contractor recovers the refrigerant safely rather than releasing it, then disposes of or recycles the old unit.

New aircon installation vs replacing an old unit

Installing an aircon in a room that has never had one is a different job from replacing a unit that already exists. A fresh install usually means running new piping through walls or trunking, mounting a new outdoor bracket, and sometimes upgrading the electrical point. A replacement often reuses existing piping and wall openings, which can save time, but only if the old pipework is in good condition and matches the new unit's refrigerant and capacity.

Contractors that quote replacement jobs should check the condition of existing copper piping, the wall sleeve, and the outdoor unit bracket before assuming they can be reused. Old R22 systems being swapped for R32 or inverter units usually need new piping anyway because the refrigerants aren't compatible with old copper sizing in some cases.

Ask if your existing piping and bracket can be reused or need replacing
Confirm the new unit's capacity (BTU) actually matches your room size, don't just match the old one
Disposal of the old unit and refrigerant recovery should be part of a replacement quote

What it costs

Replacement jobs can sometimes cost less than fresh installs if piping and wiring are reused, but often cost more once old copper needs replacing or the wall opening needs enlarging for a bigger unit. Disposal of the old unit and safe refrigerant recovery are additional factors that should be in the quote.

Top 3 by our score

Ranked from our published scoring of public Google reviews for aircon installation.

1. Dr Asia Aircond - Service, Repair, Installation & HVAC System Contractor @ Sungai Petani
4.6★ · 200 reviews

84
2. Mutiara Bumi Solution Aircond
5.0★ · 251 reviews

92
3. Hooi Air Conditioning & Elec Service
4.9★ · 57 reviews

86

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FAQ

Can the installer reuse my old piping when replacing the unit?: Sometimes, if the copper is in good condition and sized correctly for the new unit's refrigerant. Many installers still recommend new piping for older systems to avoid leaks and efficiency loss.
Do I need a bigger unit if I'm replacing an old one?: Not necessarily, but it's worth rechecking the room's BTU requirement since old units are sometimes under or oversized for the space.
What happens to the old aircon unit and its gas?: A proper contractor recovers the refrigerant safely rather than releasing it, then disposes of or recycles the old unit.

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