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Sized for weatherboard, specified for salt air

Split System Installation in Altona

Our workshop is on Jordan Close in Altona 3018, so this is the suburb where we have opened the most walls and seen the most condensers reach the end of their lives. Two things shape almost every split system job here: the way post war weatherboard behaves thermally, and what salt air does to outdoor equipment.

  • Altona 3018
  • Powercor network
  • REC 37223

The short answer

A split system installed in Altona costs $2,500 to $7,500 depending on capacity and the number of indoor heads. Reverse cycle delivers 3 to 4 units of heat per unit of electricity, against 80 to 92 percent conversion for gas, so heating a room costs roughly 28 to 36 cents an hour instead of 50 to 72 cents for ducted gas. Altona post war weatherboard homes have low ceilings but poor wall insulation, and bay salt means outdoor condensers need corrosion rated coils and stainless brackets.

Pivot Trade Services electrician working at an outdoor air conditioning unit beside a brick wall

Neither is a reason not to install. They are the reasons a system specified properly for Altona outlasts one specified from a price list, and the difference is not visible on the day of installation. It shows up in year five when one coil is clean and the other is powdered with corrosion.

Sizing a post war Altona room

Capacity comes from room volume, glazing area and orientation, ceiling height and insulation, not floor area on its own. Altona post war homes typically have 2.4 metre ceilings, which keeps the volume down, but weatherboard walls with little or no bulk insulation lose heat far faster than a modern insulated cavity.

The practical result is that a 4 by 4 metre Altona bedroom that would take 2.5kW in a Point Cook estate house often wants 3.5kW here, because the walls and the single glazed timber windows are working against you. We measure the room, check the ceiling batts and look at the western glass before putting a number on it.

  • 2.5 kW

    A small insulated bedroom or study with modest glazing and a ceiling that has been re-batted.

  • 3.5 kW

    The common Altona bedroom answer, particularly in uninsulated weatherboard or where there is west facing glass.

  • 5.0 kW

    A lounge or a lounge and kitchen in a post war layout with a doorway open to a hallway.

  • 7.1 to 8.0 kW

    Open plan living in a renovated or extended home, especially where a rear extension has added volume and glazing.

Coastal corrosion and the outdoor unit

Altona is a bay suburb and salt reaches outdoor equipment. Standard condenser coils, plated brackets and unrated fixings age noticeably faster here than four suburbs inland. We see the evidence constantly on isolators, antenna fixings and old air conditioning units around Pier Street and the Esplanade.

Our standard here is a condenser with corrosion protection on the coil, stainless or hot dip galvanised mounting hardware, and a position that is not on the fully exposed western elevation where the building allows a choice. We also suggest a fresh water rinse of the outdoor coil each spring, which costs nothing and materially extends the life of the unit.

Single heads or a multi head system

Most Altona blocks have side access with room for more than one outdoor unit, which means single head systems are usually available to you. That matters, because singles are more efficient at part load, they let rooms run at different temperatures, and one failure does not take out the whole house.

Multi head becomes the answer where a home has been extended to the boundary, where a townhouse has almost no side path, or where the only workable condenser position can hold one unit and no more. Multi head systems share one compressor and one refrigerant circuit, so all heads run in the same mode and part load efficiency is lower. Where the space exists in Altona, we recommend singles.

Running cost, gas replacement and the VEU discount

A reverse cycle split heats a room for roughly 28 to 36 cents an hour compared with 50 to 72 cents an hour for ducted gas, which is worth about $200 to $450 a year to a typical household, more if dropping gas entirely also removes the daily supply charge.

Victorian Energy Upgrades discounts come off the installation invoice directly. There is no rebate to chase afterwards and no income test. The property has to be at least two years old and there is a minimum customer contribution of $200 including GST. The program changed on 30 September 2026, so we confirm the current amount in writing at quote time rather than quoting a figure that may have moved.

Licensing and what you are left with

Refrigerant work requires an ARC licence and the electrical connection requires a licensed electrician who issues a Certificate of Electrical Safety. We hold REC 37223 and carry out both parts, which is also what most manufacturers require before they will honour a warranty claim.

What should never be optional is the part you cannot see. Brazed joints, a nitrogen pressure test, a proper vacuum to remove moisture from the lines, insulated and UV protected pipework, a graded condensate drain that goes somewhere sensible, and a dedicated circuit with an isolator. Our workmanship is guaranteed for 12 months on top of the equipment warranty.

On the ground

What we see specifically in Altona

  • Post war weatherboard with original or missing wall insulation is the defining sizing factor here. The same room needs more capacity in Altona than it would in a modern estate home with insulated cavity walls.
  • Salt exposure off Port Phillip Bay means corrosion rated condenser coils and stainless mounting hardware are our default in this postcode, not an upgrade. Standard hardware simply does not last as long here.
  • Ceiling insulation in unrenovated Altona homes is frequently compressed, patchy or absent above the extension. Fixing that before sizing the unit is often the cheapest capacity you can buy.
  • Most Altona blocks have side access wide enough for more than one condenser, which keeps single head systems on the table where inner west terraces would force a multi head.
REC 37223SAA S3962281ABN 876892969375.0 from 63 Google reviews12 month workmanship guarantee

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Answers

Altona questions

Because those charts assume floor area and average construction. Weatherboard walls with little or no bulk insulation, single glazed timber windows and a ceiling with tired batts lose heat far faster than a modern insulated cavity. A 4 by 4 metre bedroom that would take 2.5kW elsewhere often wants 3.5kW here. We measure the room and the construction rather than reading a table.

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