Can old piping be reused for a new unit?

Sometimes, if the piping size matches the new unit's requirements and isn't corroded or damaged. Contractors usually inspect this before quoting a straight swap.

Is replacing an old unit cheaper than installing in a new spot?

Generally yes, since the wall penetration and piping route are already there, cutting down labour and materials.

What if I'm upgrading to a bigger horsepower unit?

Bigger units may need larger piping, a stronger bracket, and sometimes an upgraded electrical point, so it isn't always a like-for-like swap.

New aircon installation vs full unit replacement

Not every installation job starts from scratch. A first-time install into a room with no existing piping is a different scope from swapping out an old, dying unit where wall holes, brackets and copper piping are already in place. Contractors price and plan these differently, and buyers often search separately for a straight swap versus a new setup.

Replacement jobs usually involve removing the old indoor and outdoor unit, checking whether the existing piping and wiring can be reused or need upgrading (especially if moving from a smaller unit to a larger horsepower), then mounting and connecting the new set. A ground-up install needs new wall penetration, bracket mounting, piping runs to the outdoor unit, and drainage routing.

Straight replacement: reuse of existing piping/wiring where condition allows, faster turnaround
New installation: wall drilling, piping route planning, outdoor unit placement, drainage setup
Also covers relocating an outdoor unit due to renovation or complaints from neighbours

What it costs

Replacement is often cheaper when existing piping and wiring are reusable, while a fresh install costs more due to drilling, new copper piping, and bracket work. Higher horsepower units, ducted/casette systems, or outdoor units needing a taller bracket or crane access also push costs up.

Top 3 by our score

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

1. BioHydro (M) Sdn Bhd - Aircond Service (Chemical free)
5.0★ · 413 reviews

94
2. Jaya Maju Aircond Electrical & Plumbing Services
5.0★ · 1152 reviews

94
3. Aircon Anda
5.0★ · 207 reviews

94

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FAQ

Can old piping be reused for a new unit?: Sometimes, if the piping size matches the new unit's requirements and isn't corroded or damaged. Contractors usually inspect this before quoting a straight swap.
Is replacing an old unit cheaper than installing in a new spot?: Generally yes, since the wall penetration and piping route are already there, cutting down labour and materials.
What if I'm upgrading to a bigger horsepower unit?: Bigger units may need larger piping, a stronger bracket, and sometimes an upgraded electrical point, so it isn't always a like-for-like swap.

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