Smart Thermostats near you

The manufacturer's own controller is the option that keeps everything in warranty and usually the only one that gives full access to the unit's zoning, fan modes and fault reporting. It is also the least flexible: change the equipment brand later and the controller goes with it.

A Wi-Fi module fitted inside a split system's indoor unit sits in the middle. It is designed for that unit, it is installed by a technician rather than plugged in by you, and it gives scheduling and remote control without touching the wiring of the house. What it usually does not give is a sensor anywhere other than the indoor unit, which is why a room can feel wrong even when the display says it has hit the set point.

A third-party infrared bridge is the cheapest and most portable option, and it works by imitating the remote. It has no idea what the system is really doing, it cannot read a fault, and if someone uses the handheld remote the bridge and the unit disagree until the next command. For a rental or a single room it is a reasonable answer; for a whole-house ducted system it is not.

Anything hard-wired is electrical installation work. Energy Safe Victoria's position applies nationally in substance: unqualified electrical work is not only extremely dangerous but illegal, and electrical work is not a do-it-yourself job even for small tasks such as changing powerpoints or light switches. Replacing a wall controller that is wired to a ducted unit sits well past that line, and the work should end with the certificate your state requires.

Work inside the indoor unit of a split system brings a second consideration. Opening the unit to fit a Wi-Fi module is work on the appliance as well as on its electrical supply, and it is normally done by the installing trade rather than by a general electrician, partly to keep the equipment warranty intact. Ask who is doing it and under what licence before the appointment, not afterwards.

A plug-in or battery-powered infrared bridge is the exception: it connects to nothing and is genuinely something a householder can set up. It is worth being clear which of the three you are buying, because the price difference between them is mostly the licensed labour.

Sustainability Victoria's guidance for Victorian homes is to set the thermostat between 18 and 20 degrees Celsius for heating, and states that every one degree higher will add around fifteen per cent to the heating bill. That single figure is the reason a smart control earns its keep: the value is not in the app, it is in the fact that the set point stops drifting upward and the system stops running overnight and while the house is empty.

Zoning is the other lever, and it is the one Australian ducted systems are built for. Sustainability Victoria describes the most efficient way to use a ducted reverse-cycle system as zoning it, splitting the house into different heating zones so that heating is limited to the areas being used, and notes that the indoor units of a multi-split can be operated all at once, one at a time or several at a time. A controller that can schedule zones independently is doing more useful work than one that simply schedules the whole house.

Two habits go with the control rather than being replaced by it. Sustainability Victoria recommends cleaning the filter of indoor units every month so the system operates effectively, and having a gas furnace serviced at least every two years so it operates efficiently and safely. A blocked filter shows up as a system that never reaches its set point, which people then fix by raising the set point.

A control decides when the system runs and how hard. It cannot change where the heat goes after that, and in Australian houses a great deal of it goes into the roof space. The National Construction Code's housing provisions require heating and cooling ductwork to achieve a material R-Value and to be sealed against air loss, with the required R-Value depending on the system and the climate zone, and exempt ductwork located within the insulated building envelope. Ducting that has been crushed, disconnected at a joint or stripped of its insulation is losing conditioned air before it reaches a room, and no schedule recovers that.

The second limit is the building. A ceiling with no insulation, unsealed downlights, draughty external doors and unshaded west-facing glass will pull a system back to its set point over and over, and the controller will faithfully run it. Insulation and draught sealing change how much the system has to do; the controller only changes when it does it.

The third limit is the sensor. A controller reads the temperature where it is mounted, so a wall in a sunny hallway, a spot above a heat source or a position on a bathroom wall will all report something the rest of the house is not feeling. If one room is persistently wrong, the answer is usually the sensor position or the zoning, not a different brand of thermostat.

Energy performance of heating and cooling equipment in Australia is regulated nationally under the Greenhouse and Energy Minimum Standards Act 2012, which underpins the registration of product models, minimum performance requirements and the energy labelling consumers see at the point of sale. The rating on the appliance, not the controller attached to it, is what sets the efficiency ceiling for the system.

Victoria has begun writing those ratings into tenancy law, which makes them a useful reference point even for owner-occupiers. Consumer Affairs Victoria's new minimum energy efficiency standards require, from 1 March 2027, an energy efficient fixed heater in the main living area - an air conditioner or heat pump with a GEMS heating star rating of at least two stars, or a ducted system with a GEMS Heating Seasonal Performance Factor of 3.2 or above - triggered when an existing fixed heating system fails and cannot be repaired.

The cooling standard runs alongside it: a fixed energy-efficient cooling system in the main living area rated three stars or above, or a ducted system with a Total Cooling Seasonal Performance Factor of 3.8 or above, required from 1 March 2027 at the start of a new rental agreement or a conversion to a month-to-month agreement, and for all properties from 1 July 2030. If you are replacing equipment anyway, those are sensible floors to quote against regardless of whether you are a rental provider.

The main variables are which of the three jobs you are actually asking for, whether the existing control wiring suits the new controller or a new cable has to be run, how many zones the system has and whether zone motors are being added, and whether the work is being done by the equipment brand's own service network or by an independent trade. A controller swap on a compatible ducted unit and a zoning retrofit are different projects that often arrive under the same heading.

LokalMatch is where the job starts, not where it ends. Say what system you have - brand and model of the indoor unit or heater, ducted or split, how many zones - add your postcode, and heating, cooling and electrical businesses covering your area contact you directly; those businesses pay LokalMatch for the requests they receive. LokalMatch does not do the work, does not set or quote prices and does not vet, rank or recommend anyone, so confirm the licence and the warranty position before anyone opens the unit.