Best 3-in-1 Bathroom Heaters in Australia (2026 Buying Guide)

A 3-in-1 bathroom heater puts a heater, an exhaust fan and a light into one ceiling cut-out. It is the single most-installed fitting in an Australian bathroom renovation, and it is also the one most often bought on price alone — which is how people end up with a warm bathroom that still grows mould in the grout.

This guide covers the three specs that actually decide whether a unit works in your room, then walks the current bathroom heaters range model by model. Everything here is Martec, because that is what we stock as an authorised stockist, and every figure quoted is the manufacturer's own.

Start with extraction, not heat

Extraction is the spec that decides whether the unit does its real job. Heat is comfort; extraction is what stops condensation turning into mould, peeling paint and swollen door frames. Every manufacturer quotes it in cubic metres per hour (m³/hr).

The working rule is room volume × 10 — you want the fan capable of changing the air in the room about ten times an hour. Measure length × width × height in metres, then multiply the result by ten.

The Australian building rules give you a floor, not a target. Under the National Construction Code a mechanically ventilated bathroom needs at least 25 litres per second, which is only 90 m³/hr. That is the legal minimum for a sanitary compartment — it is not the figure that keeps a family bathroom dry after two back-to-back showers.

Tip: Buy up, not down. The gap between a 300 m³/hr unit and a 500 m³/hr unit is usually $40–$80, and it is the cheapest insurance against mould you will ever buy. Overspecifying extraction costs you nothing in running cost, because the fan only runs when it is switched on.

Where the unit goes matters as much as the number

Mount it between the shower and the rest of the room, not directly over the shower rose. Directly overhead, the fan pulls the warm plume straight up and out before it has crossed the room, and the far corners stay damp. Ducting should run as short and as straight as practical to an external vent — every extra metre of flexible duct and every tight bend costs you real airflow against the rated figure.

Heat lamps vs heat tubes vs PTC elements

Three heating technologies show up in this category and they behave completely differently. This is the choice people get wrong most often.

Infrared heat lamps (275W globes)

The classic Australian setup: two or four 275W infrared globes behind a fascia. They heat you, not the air, by direct radiation — so you feel it within a second of switching on, and you feel it most standing directly underneath. Cheap to buy, effective for drying off, and the globes are a consumable you will replace every few years. Four lamps draw 1,100W, so it is not a heater to leave running.

R7s linear heat tubes (1000W)

A single 1000W quartz tube instead of multiple globes. Same instant radiant heat, but it spreads across the fascia rather than pooling under two hot spots, and there is only one consumable instead of four. This is what the higher-end units in the range use.

PTC ceramic elements

A fan blows air across a self-regulating ceramic element. Slower to feel than radiant — you are warming the room, not the person — but the warmth stays after switch-off, there is nothing to replace, and it can be thermostatically controlled. In this range PTC appears on the wall-mounted Thermo rather than the ceiling units.

Watch out: Never handle a new R7s tube or heat globe with bare fingers. The oil from your skin creates a hot spot on the quartz and shortens the life of the lamp dramatically. Use a tissue or a clean glove.

How much light you actually get

Treat the light in a 3-in-1 as task lighting for the room, not as the whole lighting plan. As a rough target a bathroom wants around 400–500 lumens per square metre, so a 12 m² bathroom is looking for roughly 5,000 lumens all up. The brightest unit in this range puts out 2,400 lm. The rest comes from downlights — one over the vanity, one over the shower, one in the general space.

Nearly everything here is tri-colour (CCT switchable) between 3000K, 4000K and 5000K, set with a dip switch at installation. For a bathroom, 4000K is the setting most people land on: warm enough not to feel like a hospital, cool enough to shave and apply makeup by. If the rest of your house is 3000K, match it — mismatched colour temperature between adjacent rooms is far more noticeable than either temperature on its own. There is more on this in our colour temperature guide.

The range, model by model

Martec Linux DC — the most extraction, the least noise

Linux DC (MBHLDC1000W) — $407

• 600 m³/hr extraction from a DC motor, rated ≤40 dB
• 1000W R7s heat tube
• 4 × 6W GU10 tri-colour lamps, 2,400 lm total
• Steel housing with aluminium fascia, IPX2, thermal overload protection
• Ships with 3 m duct, clips, external grille, 3-gang switch and back-draft stopper

This is the pick if you have a big bathroom or one that fogs badly. 600 m³/hr is the highest figure in the range and the DC motor is the reason it manages that at 40 dB instead of 50 — the difference between a fan you notice and one you don't. The four GU10 lamps also make it the only unit here bright enough to genuinely light a medium bathroom on its own. It is the most expensive option and it earns it on the two specs that matter.

Martec Linux Mini DC — the same motor, a smaller hole

Linux Mini DC (MBHMDC1000W) — $397

• 480 m³/hr DC extraction, ≤40 dB
• 1000W R7s heat tube
• 3 × 6W GU10 tri-colour lamps, 1,800 lm

Everything good about the Linux in a smaller fascia. If the ceiling space or the room does not justify the full-size unit, this keeps the quiet DC motor and the R7s tube and gives up 120 m³/hr and one lamp. In an ensuite that is the right trade.

Martec Phoenix — the metal-bodied all-rounder

Phoenix in White (MBHP1000W) — $278
Phoenix in Black (MBHP1000M) — $287.99

• 500 m³/hr extraction, 1,100W motor
• 1000W R7s heat tube with thermal overload protection
• 20W CCT LED, up to 1,695 lm across 3000K / 4000K / 5000K
• Metal housing and metal fascia
• Back-draft stopper and cut-out template included; pairs with the MBHREM remote

The best balance in the range. You get almost the Linux's extraction and the same 1000W tube for well over a hundred dollars less, and the all-metal build does not have the slightly hollow feel of the polypropylene units. It is also the only model offered in black, which matters if your tapware and shower frame are black. If you want one recommendation without reading the rest of this list, it is this one.

Martec Phoenix Mini — for ensuites and powder rooms

Phoenix Mini in White (MBHPM1000W) — $278
Phoenix Mini in Black (MBHPM1000M) — $283

• 420 m³/hr extraction, 1,100W motor
• 1000W R7s heat tube
• 10W CCT LED, 800 lm
• Same metal housing and fascia as the full-size Phoenix

A compact footprint for rooms where the full Phoenix fascia would dominate the ceiling. Note that the light drops to 800 lm, so plan on downlights doing the work.

Martec Aspire II — quiet, low-profile, well-lit

Aspire II (MBHA1000W) — $350

• 500 m³/hr extraction
• 1000W heating
• 20W tri-colour LED
• Polypropylene housing with aluminium fascia, thermal overload protection, back-draft stopper

Specs close to the Phoenix in a slimmer profile. Worth it if the low-profile look is what you are after; the Phoenix is the better value if it is not.

Martec Furnace — the 4-in-1 that also cools

Furnace 4-in-1 (MBHF2200W) — $258

• Heat, cool, extract and light from one fitting
• Efficient fan-only / cooling function
• Tri-colour LED light
• Polypropylene housing with polycarbonate fascia, thermal overload protection

The only unit in the range with a dedicated cooling mode. In a north-facing bathroom or anywhere north of Brisbane that fourth function stops being a gimmick — being able to move air over you in February is worth as much as the heat is in July.

Martec Profile Plus DC 2 and 4 — heat lamps with GU10 downlights

Profile Plus DC 2 (MBHP2LW) — $214
Profile Plus DC 4 (MBHP4LW) — $238

• 460 m³/hr extraction, ≤50 dB, ball-bearing motor with turbo blade
• 2 × or 4 × 275W infrared heat lamps
• 3 or 4 switchable-CCT GU10 LED lamps included
• 3 m duct, clips, external grille, 3-gang switch and back-draft stopper included

If you want the instant radiant hit of heat lamps but hate the look of a bare globe fascia, this is the compromise — the lamps sit in a slimline panel alongside proper GU10 downlights. Strong extraction for the money.

Martec Profile Panel 2 and 4 — the value spec-sheet pick

Profile Panel 2 (MBHN2LW) — $247
Profile Panel 4 (MBHN4LW) — $289

• 460 m³/hr extraction, ≤50 dB, IPX2
• 2 × or 4 × 275W heat lamps, half-heat function on the 4-lamp model
• 12W tri-colour LED, 850–950 lm
• Cut-out 435 × 255 mm (Panel 2) — check your ceiling depth, 220 mm minimum

The half-heat function on the Panel 4 is genuinely useful: four lamps is a lot of heat and a lot of watts for a quick morning shower, and being able to run two is the difference between using the heater and avoiding it.

Martec Striker 4 — best extraction-per-dollar

Striker 4 (MBHS4LW) — $146

• 360 m³/hr extraction at ≤40 dB — quiet for the price
• 4 × 275W heat lamps with half-heat function
• 12W R80 tri-colour LED, 1,100–1,200 lm
• IPX4 rated, 320 × 320 mm cut-out, 200 mm minimum ceiling depth

The value standout. IPX4 and ≤40 dB at this price is unusual, and the square 320 mm cut-out is a common size. For a standard family bathroom on a budget this is the one to beat.

Martec Forme 2 and 4 — compact, quiet, ducting included

Forme 2 (MBHF2LW) — $124.99
Forme 4 (MBHF4LW) — $145

• 300 m³/hr extraction from a 45W turbo fan
• 2 × or 4 × E27 275W infrared lamps
• 10W tri-colour switchable LED
• Exterior grille with self-closing shutter and 1.5 m flexible duct included
• 386 × 215 × 197 mm, 375 × 202 mm cut-out

Small footprint, self-closing shutter, safety cut-out thermostat. Sized for small to medium bathrooms — at 300 m³/hr, do not put one in a large room and expect it to keep up.

Martec Contour 2 and 4 — the entry point

Contour 2 (MBHC2LW) — $94.99
Contour 4 (MBHC4LW) — $114.25

• 240 m³/hr (Contour 2) and 250 m³/hr (Contour 4) turbo extraction
• 2 × or 4 × 275W infrared heat lamps
• 8W R80 E27 LED included — 800 lm, fixed 3000K

The cheapest way to get all three functions. Be honest about the extraction: 240–250 m³/hr is a powder room or a small ensuite figure. The light is also fixed warm white rather than switchable. Right unit for a rental or a second bathroom, wrong unit for the main one.

Two units that are not 3-in-1s, but often the better answer

Martec Uno single heat lamp (MBHU1LW) — $60.49. A single 275W infrared lamp in a 155 mm cut-out. If you already have good extraction and good light and just want warmth over the drying area, this is all you need. Not dimmable.

Martec Thermo 2200W PTC wall heater with towel rail (MBHT2200W) — $196. A wall unit rather than a ceiling one: 2200W PTC element, touch controls with a live temperature readout, thermostat adjustable 20–45°C, a 5–90 minute timer, half-heat mode, an oscillating outlet and an integrated towel rail, all at ≤45 dB. If your ceiling is concrete, or the ceiling space is full, or you want warm towels as well as a warm room, this solves a problem no ceiling unit can.

Full comparison table

Prices shown are correct at the time of publishing and include GST. Stock and pricing change — check the product page for the current figure.

Installation, cut-outs and ceiling depth

Three numbers decide whether a unit physically fits, and they are the ones people check last:

• Cut-out size — the hole in the plasterboard. The Striker 4 is 320 × 320 mm; the Profile Panel 2 is 435 × 255 mm; the Forme is 375 × 202 mm. If you are replacing an existing unit, measure the current hole before you buy, because a smaller replacement means patching and a larger one means a bigger hole in a waterproofed ceiling.
• Minimum ceiling depth — clearance above the plasterboard. Most of these units need 200–220 mm. In a flat-roofed apartment or under a low pitch that is not guaranteed.
• Duct diameter — commonly 120–150 mm. The duct has to reach an external vent; venting into the roof cavity moves the moisture problem rather than solving it, and it is not compliant.

Most models in the range are adaptable to the Martec MBHREM / MBHRKIT remote kit, which is worth adding at installation if the switch plate would otherwise end up on the far side of the room.

In Australia, hard-wired ceiling fittings, heaters and fans must be installed by a licensed electrician. Nothing on this page is a substitute for the installation instructions supplied with the product or for AS/NZS 3000.

Frequently asked questions

What size 3-in-1 bathroom heater do I need?

Multiply your bathroom's length × width × height in metres to get the volume, then multiply by 10. A 2.5 × 2.0 × 2.4 m bathroom is 12 m³, so you want around 120 m³/hr as an absolute minimum and 250–400 m³/hr to keep it genuinely dry. The NCC minimum of 25 L/s (90 m³/hr) is a legal floor, not a design target.

Are heat lamps or a heat tube better?

Both give instant radiant heat. A 1000W R7s tube spreads the heat across the fascia and gives you one consumable instead of four, which is why it appears on the higher-spec units. Four 275W heat lamps deliver more concentrated warmth directly underneath and cost less up front, but draw 1,100W and need replacing more often.

Can I run the heater and the exhaust fan at the same time?

On these units, yes — they are separately switched, which is why they ship with a 3-gang or 4-gang wall plate. Running both together does mean you are heating air you are then extracting, so most people run the heater while showering and leave the fan going for 10–15 minutes afterwards.

How long should I leave the exhaust fan running after a shower?

At least 10 minutes, ideally 15–20. Most of the moisture is still airborne and on the surfaces when you step out, and switching the fan off with the light is the single most common reason a well-specified bathroom still gets mould. A run-on timer or a separate switch fixes it.

Do I need a licensed electrician to install one?

Yes. These are hard-wired ceiling fittings in a wet area, and in Australia that is licensed electrical work. Some ceiling exhaust fans in this range are supplied with a flex and plug for connection to an existing switched socket, but the 3-in-1 units are not.

Which is the quietest 3-in-1 bathroom heater?

The Linux DC and Linux Mini DC, both rated ≤40 dB thanks to their DC motors, and the Striker 4 which also achieves ≤40 dB. Most of the polypropylene units sit at ≤50 dB, which is noticeably more present in a tiled room.

Keep reading

• What size exhaust fan do I need? A sizing guide
• Heat lamps, fan heaters or panel heaters — which bathroom heater type?
• 3000K vs 4000K vs 5000K: choosing LED colour temperature
• How many downlights do I need?

Ready to shop? Browse the full bathroom heaters range, or the exhaust & bathroom fans range if you already have heating sorted.