Replace Gas · Melbourne Metro

Panasonic CO₂
Heat Pump 315L

HE-UM40CR · Split System · 315L Tank

Replace your gas hot water and cut your annual bill from ~$1,200 to ~$175. CO₂ technology with a GWP of just 1, 315L tank, 37dB operation, no electric backup ever needed — and a 10-year parts and labour warranty.

$3,430 installed*

*After VEU, STC & SolarVic rebates. Gas-to-heat-pump gets maximum rebate. Standard installation conditions.

Replaces gas — max VEU rebate

COP 5.0 — 5× more efficient

315L — large household tank

37 dB — barely audible

10-yr warranty — parts & labour

Get a free quote View full specs

$3,430installed*

How CO₂ technology works

1kW in, 5kW out

Outdoor unit draws heat from the air

The split-system outdoor unit extracts heat energy from ambient air — even at -10°C — using CO₂ as the refrigerant. Replaces your gas flue entirely.

CO₂ transfers heat at high efficiency

R744 (CO₂) operates at higher pressures than conventional refrigerants, enabling superior heat transfer and a COP of 5.0 — your gas system can't get close.

Stratified heating — hot water available fast

The 315L tank heats from the top down, so usable hot water at 59°C is available within minutes — no waiting like a gas storage system recovering.

No electric backup ever — even at -10°C

Unlike other heat pumps, the CO₂ system produces 59°C water without any electric element, even on Melbourne's coldest winter nights.

5.0

COP at AS 5125 test conditions. For every $1 of electricity, you get $5.00 worth of hot water. Your current gas system delivers roughly $0.65 worth of heat per $1 of gas.

The product

Replace your gas.
Nothing compromised.

The Panasonic CO₂ system is the definitive gas replacement — a split-system design where the outdoor unit connects to your 315L storage tank. The outdoor unit is manufactured in Japan and the tank in Australia, both covered by a 10-year parts and labour warranty. No other residential system on the market offers this combination of efficiency, quiet operation, and warranty coverage.

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~$1,000/year saving over gas

Gas costs ~$1,200/year. This system costs ~$175/year to run. The saving starts immediately and every gas price rise makes the gap bigger.

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CO₂ refrigerant — GWP of just 1

R744 (CO₂) has a Global Warming Potential of 1 — the absolute lowest. You're not just getting off gas bills, you're getting off gas emissions too.

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Split system — flexible installation

The outdoor unit and tank are separate — the unit can be positioned wherever suits your property, with no restriction on tank location.

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37dB — barely audible

At 37dB, quieter than a library whisper. Perfect for installations close to bedrooms, living areas or neighbours.

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PV / Solar ready

Set it to run during your solar export hours and your hot water runs on near-free energy.

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10-year parts & labour warranty

The longest warranty in residential heat pumps. Conditions apply — ask us for details when you enquire.

Smart control

Control from
your phone

The Panasonic Comfort Cloud app gives you complete control of your hot water from your phone. View usage, set schedules, boost on demand, or activate holiday mode from anywhere.

Timer & scheduling — automate around your solar export or off-peak tariff

One-shot boost — heat to 65°C on demand

Self legionella control — automatic protection built in

Holiday mode — save energy while you're away

Self defrost & anti-freeze — automatic cold weather protection

Wireless LAN built in — no extra hardware needed

Technical specifications

Built for performance

Verified figures from the Panasonic CO₂ datasheet. Heat pump HE-UM40CR with PHE-315ASR stainless steel tank.

5.0

COP at AS 5125 test condition

315 L

Stainless steel tank

37 dB

Noise — quietest available

10 yr

Parts & labour warranty

Heat Pump — HE-UM40CR
COP (AS 5125 condition 4)	5.00
Heat output	4.00 kW
Electric input	0.80 kW
Max power input	2.0 kW
Max heat output	5.6 kW
Noise level	37 dB(A)
Heating temperature	63°C
Min operating temp	-10°C
Refrigerant	R744 (CO₂) · 630g · GWP 1
Design pressure	14 MPa / 9 MPa
Current input (max)	10.0A
Power supply	230–240V / 50Hz
Ingress protection	IPX4
Weight	41 kg
Manufacture	Japan

Tank — PHE-315ASR (Stainless)
Tank volume	315L
Material	Stainless steel
Connections	Dual handed
Height	2,038 mm
Diameter	620 mm
Weight (empty)	75 kg
PTR valve	700 kPa
Max mains pressure	500 kPa
Water connections	3/4" BSP female
Manufacture	Australia
Warranty	10 yr parts & labour

Controller — HE-1MAHR
Wireless LAN	Built-in
Power source	DC 12.2V
Rated consumption	4W
Ingress protection	IPX4
App	Comfort Cloud

Your saving vs gas hot water

Panasonic CO₂ 315L · COP 5.0 · Real Victorian tariff rates

People in household4 people

Current hot water system

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Heat pump running cost

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Have solar panels?

Schedule your heat pump to run during the day and your hot water running cost drops to near zero. Most Victorian retailers now pay as little as 2–3c/kWh feed-in — that solar is worth almost nothing exported. Far better to use it to heat your water for free.

💡 VEU, STC & SolarVic rebates already in the $3430 price. Gas-to-heat-pump gets the maximum VEU rebate — we handle all paperwork.

Based on: Victorian gas Step 1 tariff 6.1c/MJ · 8 min shower · 55c/kWh electricity

💡 VEU, STC & SolarVic rebates already in the $3,430 price. Gas-to-heat-pump gets the maximum VEU rebate — we handle all paperwork.

Why the Panasonic CO₂ 315L

The most future-proof gas replacement

~$1,000 annual saving over gas — immediately

Gas costs ~$1,200/year. This system costs ~$175/year. Every year gas prices rise, the saving gets bigger — you've locked in the low side forever.

No electric backup ever — genuine independence

The CO₂ system produces 59°C water at -10°C with no electric element. Total gas replacement, total energy independence — no caveats.

GWP of 1 — the cleanest refrigerant available

CO₂ has a Global Warming Potential of 1. You're not just switching energy sources — you're switching to the most environmentally responsible technology available.

10-year warranty — the longest available

Full parts and labour for 10 years. The most comprehensive residential heat pump warranty on the market.

Get a quote

Get off gas this week

Tell us about your home and current gas system. We'll get back with a firm quote — usually same day.

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All Melbourne metro suburbs

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Mon–Sat, 7am–6pm

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Same-week installation available

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Panasonic CO₂Heat Pump 315L