Split & cassette systems supplied and installed

Air conditioning installation in Melbourne

Split system and cassette supply and installation by ARC-licensed technicians based in Bayswater — plus new for old replacement of tired units. Fixed written quotes and tidy work.

  • ARC licence · L126509
  • BPC registered · 116236
  • REC · 27289
  • Compliance certificate with every job
  • Split & cassette systems supplied and installed
Installation types

Three ways to air condition a Melbourne home

Which one suits you comes down to how many rooms you need conditioned, how much roof and wall space you have, and what you want to spend.

Split system installation

One indoor head, one outdoor unit. The most cost-effective way to add reverse cycle heating and cooling to a bedroom, study or living area. Usually a half-day job.

Split systems

Cassette air conditioner installation

A ceiling-recessed indoor unit that throws air four ways from a flush panel. Ideal for large open-plan living areas, shops and offices — nothing hanging on the wall.

Cassette systems

What a Mr Cool Mr Heat installation includes

Cheap air conditioning installation in Melbourne usually means something has been left out. Here is what is always in our price, so you can compare quotes properly.

  • Supply of the agreed make, model and capacity — named on the quote, not “or equivalent”
  • Wall or ceiling mounting of the indoor head, and a levelled bracket or slab for the outdoor unit
  • Insulated refrigerant pipework, drain and electrical, neatly run and covered where it is visible
  • Nitrogen pressure test and vacuum of the pipework before commissioning — the step most often skipped
  • Dedicated electrical circuit and isolator where required, plus a Certificate of Electrical Safety
  • Core drilling and full make-good to brick, weatherboard or render
  • Commissioning, controller and app setup, and a walkthrough with you
  • Removal of the old unit and all packaging from site
  • A compliance certificate issued on completion — with every job

What can add to the price

Long pipe runs, second-storey or roof access, a switchboard that is already full, asbestos-containing eaves, crane or scaffold access and heritage overlay conditions all add cost. We identify these at the site assessment, not on installation day.

Outdoor condenser unit installed during an air conditioning installation in Melbourne
Getting it right

Sizing: getting the capacity right

A rough guide to capacity by room size. We confirm the exact figure at the site assessment.

Indicative air conditioning capacity by room size
SpaceApproximate floor areaTypical capacityUsual solution
Bedroom or studyUp to 20 m²2.5 kWSingle split system
Large bedroom or small lounge20–30 m²3.5 kWSingle split system
Open-plan living and kitchen30–45 m²5.0–6.0 kWSingle split system
Large open-plan or high ceilings45–65 m²7.1–8.0 kWLarge split or ceiling cassette
Three to five roomsWhole floor2.5–5.0 kW eachA split system in each room
Shop, office or large open area50 m²+7.1–14 kWCeiling cassette
Why sizing matters more than brand

An undersized system runs at full tilt on the worst days and never quite gets there. An oversized one reaches temperature too quickly, short-cycles, leaves the room humid and wears its compressor out early. The table above is a starting point only — ceiling height, glazing area, orientation, insulation and how open the space is all shift the number, sometimes considerably. We calculate it properly on site.

On the day

How installation day runs

  1. Protection down

    Drop sheets and floor protection through the work path before anything else happens.

  2. Core and mount

    Core drill the wall penetration, mount the indoor head level, and set the outdoor unit on brackets or a slab clear of the ground.

  3. Pipe, drain and power

    Run and insulate the refrigerant pipework and condensate drain, and pull in the electrical from a dedicated circuit.

  4. Pressure test and vacuum

    Nitrogen pressure test to prove the joints, then evacuate the lines to remove moisture and non-condensables before releasing refrigerant.

  5. Commission and certify

    Run the system through heating and cooling, check operating pressures and airflow, and issue the Certificate of Electrical Safety.

  6. Clean up and hand over

    Make good the penetration, remove old equipment and packaging, and walk you through the controller before we leave.

Licensed, insured and accountable

Every installation is carried out by licensed tradespeople and certified to Australian standards.

Building and Plumbing Commission registered 116236
BPC registered · 116236
Energy Safe Victoria licensed
Energy Safe Victoria · REC 27289
ARC licensed refrigerant handler L126509
ARC licence · L126509
Customer reviews

What our customers say

Feedback left by customers after recent Mr Cool Mr Heat jobs across Melbourne’s eastern suburbs.

Rated 5 out of 5

Efficient timely and expert installation of our Mitsubishi split system. So much better for health and pocket than cumbersome gas ducted heating. Thankyou
Janet L. Verified customer · Oct 2025

Rated 5 out of 5

Benn was helpful and did his job well
Jenny E. Verified customer · Sep 2025

Rated 5 out of 5

  • Professional service
  • Explained the work
  • Quality workmanship
Angela E. Verified customer · Nov 2025

Rated 4 out of 5

  • Professional service
  • Arrived on time
  • Clean work area
  • Quality workmanship
  • Explained the work
Henry A. Verified customer · Jan 2026
Answers

Air conditioning installation questions

We provide air conditioning installation across Bayswater · Boronia · Ferntree Gully · Wantirna · Ringwood · Croydon · Knoxfield · Rowville · Vermont · Mitcham · Box Hill · Glen Waverley and the wider eastern suburbs. See our eastern suburbs service area for the full list.

Get a fixed price on your installation

Free site assessment across Melbourne's eastern suburbs. No obligation, no “from” pricing.

Free, no-obligation quote

Book your free site assessment

Tell us the rooms you want conditioned and your suburb. We will assess on site and come back with a fixed written quote.

Call now Free quote