7 kW class
7 kW split systems, compared on the figures that matter.
A 7 kW unit typically suits a open-plan living and dining — roughly 32 to 64 square metres depending on which way it faces, how well it is insulated and how many people use it. 47 models in this class are registered for sale in Australia across 8 brands.
Quick answer
A 7 kW split system air conditioner suits a room of roughly 32 to 64 square metres — typically a open-plan living and dining — with the exact figure depending on orientation, insulation, ceiling height and occupancy. 47 distinct 7 kW-class models are registered with the Australian Government's GEMS database across 8 brands: Carrier, Daikin, Fujitsu, Hisense, Mitsubishi Electric, Mitsubishi Heavy Industries, TCL, Teco. In this class the best cooling efficiency figure is AEER 3.9 and the best heating efficiency figure is ACOP 4.33, and the lowest declared indoor noise level is 52.7 dB. Thunderman Electrical and Air Conditioning Services supplies and installs units in this class across Greater Melbourne under ARCtick certification, with electrical work by REC 28523.
What this size means on the job
The part a showroom won't tell you.
7 kW is the open-plan size — living, dining and usually a kitchen with no door between them. All eight brands register a unit here, so the choice is wide, but this is the capacity where a single head starts to struggle with the shape of a room rather than its area. A long L-shaped space will have a warm corner no matter how well the unit is sized, which is where a multi-head system earns its cost over a bigger single head. Electrically, a unit at this size is a dedicated circuit as a matter of course, and on a board that is already full it is the point where an upgrade stops being optional.
Quietest in this class
Ranked by declared indoor noise.
In this class the declared indoor noise levels run from 52.7 dB to 68 dB — a spread of 15 dB between the quietest and the loudest, which is a difference you would hear plainly in the same room.Capped at three models per brand so one range cannot fill the table.
| Model | Cooling | Heating | Indoor noise | AEER | ACOP | Stars | Registration |
|---|---|---|---|---|---|---|---|
| TecoTWS-TSO70H3DVKT | 7 kW | 7 kW | 52.7 dB | 3.45 | 3.32 | 3 / 2.5 | AAC8919 |
| TecoTWS-TSO72H3DVJT | 7 kW | 7 kW | 52.7 dB | 3.45 | 3.32 | 3 / 2.5 | AAC7278 |
| TCLTPH11IT | 7.2 kW | 7.2 kW | 53.68 dB | 3.76 | 4.19 | 3.5 / 2.5 | AAC7664 |
| Mitsubishi Heavy IndustriesDXK_71+2 variants | 7.1 kW | 8 kW | 55 dB | 3.84 | 3.94 | 3.5 / 2.5 | AAC8721 |
| Mitsubishi Heavy IndustriesDXK24ZRA-WF1+1 variant | 7.1 kW | 8 kW | 55 dB | 3.83 | 3.94 | 3.5 / 2.5 | AAC8233 |
| Mitsubishi Heavy IndustriesDXK24ZRA-WF+1 variant | 7.1 kW | 8 kW | 55 dB | 3.83 | 3.94 | 3.5 / 2.5 | AAC7764 |
| Mitsubishi ElectricMSZ-AP71VGD+3 variants | 7.1 kW | 8 kW | 58.1 dB | 3.53 | 3.82 | 3 / 2.5 | AAC6359 |
| Mitsubishi ElectricMSZ-AP71VGD+4 variants | 7.1 kW | 8 kW | 59 dB | 3.53 | 3.82 | 3 / 2.5 | AAC7201 |
Cooling and heating are rated capacity. AEER andACOP are the annual efficiency figures for cooling and heating — higher is cheaper to run. Stars are shown as cooling / heating for a mixed climate zone, which is the one Melbourne sits in. Indoor noise is the manufacturer's declared sound level for the indoor unit. Every figure is as registered with the Australian Government's GEMS register, and the registration number is there so you can look it up yourself.
Cheapest to run — cooling
Ranked by AEER.
Cooling efficiency in this class runs from AEER 3.11 to 3.9 — the best unit here delivers about 25% more cooling per unit of power than the weakest. That gap is what you are choosing between, and it does not show up on the star sticker, because stars are banded.
| Model | Cooling | Heating | Indoor noise | AEER | ACOP | Stars | Registration |
|---|---|---|---|---|---|---|---|
| HisenseHAWG24KR | 7.2 kW | 7.5 kW | 64.5 dB | 3.9 | 3.91 | 3.5 / 2.5 | AAC8257 |
| Mitsubishi Heavy IndustriesDXK_71+2 variants | 7.1 kW | 8 kW | 55 dB | 3.84 | 3.94 | 3.5 / 2.5 | AAC8721 |
| Mitsubishi Heavy IndustriesDXK24ZRA-WF1+1 variant | 7.1 kW | 8 kW | 55 dB | 3.83 | 3.94 | 3.5 / 2.5 | AAC8233 |
| Mitsubishi Heavy IndustriesDXK24ZRA-WF+1 variant | 7.1 kW | 8 kW | 55 dB | 3.83 | 3.94 | 3.5 / 2.5 | AAC7764 |
| HisenseHAW24KR+2 variants | 7.2 kW | 8 kW | 64.4 dB | 3.78 | 3.51 | 4 / 2.5 | AAC9240 |
| TCLTPH11IT | 7.2 kW | 7.2 kW | 53.68 dB | 3.76 | 4.19 | 3.5 / 2.5 | AAC7664 |
| Mitsubishi ElectricPKA-M71KA+6 variants | 7.1 kW | 8 kW | not published | 3.68 | 3.65 | 2.5 / 2.5 | AAC6696 |
| DaikinFTXM71UVMZ | 7.1 kW | 8.1 kW | not published | 3.62 | 4.15 | 3 / 2.5 | ZAC0721 |
Best for a Melbourne winter
Ranked by ACOP — the heating figure.
Heating efficiency here runs from ACOP 3.3 to 4.33, a spread of about 31%. Because Melbourne runs a reverse-cycle system for warmth far more of the year than for cooling, that spread costs more over time than the cooling one does — and this ranking is rarely the same as the one above it.
| Model | Cooling | Heating | Indoor noise | AEER | ACOP | Stars | Registration |
|---|---|---|---|---|---|---|---|
| DaikinFTXM71AVMA | 7.1 kW | 8 kW | 65 dB | 3.47 | 4.33 | 3.5 / 3 | AAC10033 |
| DaikinFTXV71W1VMA | 7.1 kW | 8 kW | 65 dB | 3.62 | 4.19 | 3 / 2.5 | AAC6562 |
| DaikinFTXV71W2VMA | 7.1 kW | 8 kW | 65 dB | 3.62 | 4.19 | 3 / 2.5 | AAC6732 |
| TCLTPH11IT | 7.2 kW | 7.2 kW | 53.68 dB | 3.76 | 4.19 | 3.5 / 2.5 | AAC7664 |
| FujitsuASTG24KMTC | 7.1 kW | 8 kW | 64 dB | 3.41 | 4.18 | 3.5 / 2.5 | AAC8710 |
| FujitsuASTH24KMTD | 7.1 kW | 8 kW | 64 dB | 3.41 | 4.18 | 3.5 / 2.5 | AAC7483 |
| TCLVEIH+4 variants | 7.2 kW | 7.3 kW | 63.8 dB | 3.42 | 3.96 | 3 / 3 | AAC8788 |
| TCLU+4 variants | 7.2 kW | 7.3 kW | 63.8 dB | 3.42 | 3.96 | 3 / 0 | AAC10354 |
Not sure this is the right size?
Look either side.
All figures from the GEMS registration database (Australian Government). Every model above carries its registration number so you can check it atthe register.
7 kW air conditioners — common questions
Is one 7 kW unit better than two smaller ones?
It depends on the shape of the space rather than its size. One head suits an open rectangular area where air can move freely. Two smaller heads, or a multi-head system, suit an L-shaped or partly divided space where a single unit would leave a corner that never gets comfortable. A site visit answers this properly, because it depends on doorways, ceiling height and where the sun lands in the afternoon.
How many 7 kW models are sold in Australia?
47 distinct models in this capacity class are currently registered with the Australian Government's GEMS database, across 8 brands: Carrier, Daikin, Fujitsu, Hisense, Mitsubishi Electric, Mitsubishi Heavy Industries, TCL, Teco. That count is registrations rather than shelf listings — a single registration often covers several colourways of the same unit, which is why a retailer's catalogue looks larger.
What is the quietest 7 kW air conditioner?
The lowest declared indoor sound level in this class is 52.7 dB. Noise figures are declared by the manufacturer at a stated fan speed, so they compare like with like between models but will not match what you measure in a room — where the mounting position, the wall and the furnishings all change what you hear. A unit that is quiet on paper and badly positioned will still be the loudest thing in a bedroom.
Does a 7 kW unit heat as well as it cools?
Not necessarily, and in Melbourne that is the question worth asking. In this class the best cooling efficiency figure (AEER) is 3.9 and the best heating figure (ACOP) is 4.33, and they usually belong to different models. Because a reverse-cycle system here runs for warmth far more of the year than for cooling, the heating figure generally deserves more weight than the cooling star rating a showroom will point at.
Right size, wrong switchboard is still the wrong job.
Yiannis will confirm the capacity against the actual room, check the board can carry it, and quote the whole job rather than the easy half. Free quote, ARCtick certified, REC 28523.