What outlet water temperatures can Q‑ton deliver?

Q‑ton delivers sanitary‑grade hot water from 60°C up to 90°C for commercial applications and underfloor heating.

Can Q‑ton operate in very low ambient temperatures?

Yes. Q‑ton is engineered to perform in ambient temperatures down to −25°C.

What is Q‑ton’s energy efficiency?

Q‑ton achieves a COP of up to 4.3 (condition‑dependent), significantly reducing energy use and operating costs compared to traditional systems.

Does Q‑ton include a legionella sanitary cycle?

Yes. Q‑ton includes an inbuilt sanitary cycle that superheats water to eliminate bacteria.

How does Q‑ton work?

Q‑ton absorbs heat from the air and uses a patented two‑stage rotary‑scroll compressor to compress CO₂ refrigerant, transferring heat to water and delivering 60–90°C hot water for sanitary use and space heating.

Q-ton Air to Water Heat Pump

Q: Which industries is Q‑ton suited to?

Q‑ton is ideal for aged care facilities, hospitals, hotels, gyms, breweries, wineries and food processing plants.

Q-ton is a high-efficiency air-to-water CO₂ heat pump that delivers 60°C to 90°C sanitary-grade hot water for commercial applications and underfloor heating. Engineered for reliability in extreme conditions, Q-ton performs in ambient temperatures as low as −25°C, making it ideal for aged care facilities, hospitals, hotels, gyms, breweries, wineries, and food processing plants.

By using CO₂ as a natural refrigerant and advanced Japanese-engineered components, Q-ton delivers exceptional energy efficiency – helping businesses cut energy use and operating costs while reducing emissions and improving sustainability.

POWER: Three Phase | HEATING CAPACITY: 30.0kW

Key features

Delivers 60-90°C hot water in temperatures as low as -25°C
Highly energy efficient offering reductions in running costs
Up to 76% less emissions than gas boilers & up to 74% less emissions that electric heaters
Easy to use touch screen control with advanced functions
High quality, Japanese engineered technology and components
Anti-Legionella sanitary cycle to eliminate bacteria

Up To 6 Times More Energy Efficient

Q-ton’s advanced compressor technology delivers exceptional efficiency – producing up to 4.3kW of heat for every 1kW of energy consumed. For comparison; electric heaters typically only deliver around 1kW of heat per 1kW of energy, while gas boilers average 0.8 kW. This makes Q-ton air to water heat pump up to six times more efficient than gas boilers and five times more efficient than electric heaters.

This level of performance delivers a dramatic reduction in energy use and operating costs usually resulting in tens of thousands of dollars in annual savings, a short payback period, and a strong long-term return on investment.

Up to 76% Less Emissions Than Traditional Systems

The Q-ton air to water heat pump produces 76% less emissions than gas boilers and 74% less emissions than electric water heaters*, offering businesses a long-term solution to reducing their carbon footprint and environmental impact.

*Intermediate season: Air on at 16°C, Water on at 17°C, Water off at 65°C.

Reliable Hot Water

60-90^oC hot water in temps as low as -25^oC , maintaining 100% capacity down to -7^oC

Lower Operation Costs

One of the industry's leading energy efficiency ratings, offering reduced operating energy usage and operating costs.

Fewer Carbon Emissions

Q-ton produces 76% less emissions than a gas boiler and 74% less emissions than an electric water heater.

Minimise Maintenance

Reliable technology and components backed by 140 years of Japanese engineering helps reduce maintenance.

Easy Operation

Easy to use touch screen allows scheduling of hot water generation during off-peak periods, offering further cost savings.

Flexible System Design

Flexible design allowing seamless retrofitting into existing hot water systems.

Advanced Monitoring

Easy integrating into building management systems to provide advanced monitoring.

Legionella Protection Cycle

Dedicated sanitary cycle that superheats water at a consistent 70°C, eliminating legionella bacteria.

FEATURES
CONTROL OPTIONS
DOWNLOADS

Q-ton

Easy operation

Easy to use touchscreen control with advanced functions including user friendly scheduling options and one-touch fill up.

Environmentally Responsible

Produces 74% than an electric heater and 76% less emissions than a gas boiler.

High Efficiency

High coefficient of performance (4.3 in intermediate season) delivering massive reductions in both running costs and CO2 emissions.

High Performance

Delivers 60°C to 90°C water supply in -25°C ambient temperature. Ability to maintain 100% capacity down to -7°C.

Long Term Reliability

High quality, robust technology and components offering long life expectancy.

Modbus Compatibility

Ability to send messages via Modbus communication via the RCI-MDQE interface kit.

Space heating

Q-ton can be used in variety of space heating applications including underfloor heating and low temp radiators.

Space Saving Design

Much smaller footprint compared to gas boilers offers easier installation and design flexibility.

SELECT CONTROLLER TYPE FOR DETAILS:

RC-Q1EH

Easy to use, touch screen LCD screen
Large 3.8 inch full dot display
Backlight Function
Easy to use manual operation to manually fill water tank to suit demand
Variety of schedule options including weekly and daily timers and a peak-cut timer.

Solutions for Any Commercial Application

Q-ton air to water heat pump offers a reliable and efficient hot water solution for any sized business in any industry from aged care, food & beverage, healthcare, hospitality, fitness, horticulture and more.

DISTILLERIES

Lark Distillery, TAS

AGED CARE

Eden Care, Auckland

HEALTHCARE

Timaru Hospital, South Canterbury

HOSPITALITY

Atura Hotel, Wellington

STADIUMS

Mt Smart Stadium, Auckland

The Smarter Choice for Sustainable Hot Water

Compared to traditional gas boilers and electric heaters, Q-ton offers superior energy efficiency, lower carbon emissions and reduced operating costs and reliably delivers hot water in any conditions.

Q-ton air to water CO₂ heat pumps are manufactured in our state-of-the-art ISO 9001 and ISO 14001 certified facility in Japan. It meets international standards for quality, environmental management and safety, including CE marking, WaterMark approval, WRAS certification, and BREEAM compliance. These accreditations ensure Q-ton delivers reliable, sustainable performance for commercial applications worldwide.

Proven Solution Trusted by Global Brands

Already trusted by hundreds of brands globally across industries such as aged care, food and beverage, healthcare, hospitality and fitness, The Q-ton has helped businesses of all sizes reduce operating costs, boost efficiency, and transition toward carbon neutrality. View our full list of case studies below.

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Frequently Asked Questions

Why is the Q-ton air to water CO₂ heat pump better than electric or gas water heaters?

The Q-ton air to water CO₂ heat pump outperforms traditional electric and gas water heaters in efficiency, sustainability, and cost savings. Unlike gas boilers, Q-ton air to water CO₂ heat pump produces zero on-site emissions and operates with up to 76% lower CO₂ output. Compared to electric heaters, Q-ton CO₂ heat pump uses up to 60% less energy thanks to its advanced heat pump technology, which extracts heat from the air instead of relying solely on electricity. This results in lower operating costs, reduced carbon footprint and compliance with sustainability targets, making it the superior choice for commercial hot water applications.

What is an air to water CO₂ heat pump hot water system and how does it work?

An air to water CO₂ heat pump hot water system is an energy-efficient system that utilizes carbon dioxide (CO₂) as a natural refrigerant to heat water. It operates by extracting ambient heat from the surrounding air, even in low temperatures, and transferring it to the water through a refrigeration cycle. This process involves the CO₂ refrigerant absorbing heat, being compressed to increase its temperature, and then releasing the heat to warm the water before the cycle repeats. Unlike traditional gas or electric water heaters, this allows air to water CO₂ heat pumps such as the Q-ton to achieve a Coefficient of Performance (COP) of 4.3 meaning they generate 4.3 times more heat energy than the electricity they consume. This results in significant energy savings and a reduced carbon footprint.

Why are CO₂ heat pump hot water systems better than electric or gas water heaters?

CO₂ heat pump hot water systems such as the Q-ton outperform traditional electric and gas water heaters in efficiency, sustainability, and cost savings. Unlike gas boilers, co2 heat pumps such as the Q-ton produces zero on-site emissions and operates with up to 76% fewer CO₂ emissions. Compared to electric heaters, Q-ton uses up to 60% less energy thanks to its advanced heat pump technology, which extracts heat from the air instead of relying solely on electricity. This results in lower operating costs, reduced carbon footprint, and compliance with sustainability targets, making it the superior choice for commercial hot water applications.

What are the benefits of an air to water CO₂ heat pump hot water system?

Air to water CO₂ heat pump hot water systems such as the Q-ton offer numerous advantages over traditional gas and electric water heaters, including:

Superior Energy Efficiency – They use up to 60% less energy than electric water heaters, significantly lowering electricity costs.
Lower Carbon Emissions – By utilizing CO₂ as a natural refrigerant, these systems produce far fewer greenhouse gas emissions compared to gas or traditional heat pumps.
High-Temperature Hot Water – Unlike standard heat pumps, CO₂ systems can heat water up to 90°C, making them ideal for commercial applications.
Reliability in All Climates – CO₂ heat pumps maintain high efficiency even in cold temperatures, ensuring consistent performance year-round.
Long-Term Cost Savings – With a lifespan of 15+ years and low maintenance requirements, these systems provide a great return on investment.
Government Rebates – Q-ton is currently eligible under both the VIC Government’s Victorian Energy (VEU) Program and the NSW Government’s Energy Saving Scheme (ESS). Businesses in NSW or VIC can access thousands in rebates when replacing inefficient hot water systems with a Q-ton air to water hot water heat pump.

What industries and sectors are suitable for the Q-ton air to water CO₂ heat pump?

Air to water CO₂ heat pump hot water systems such as the Q-ton are ideal for industries that require a reliable, energy-efficient, and sustainable hot water supply. Some of the key sectors that benefit from this technology include:

Hospitality & Accommodation – Hotels, resorts, and serviced apartments need large volumes of hot water for guest rooms, kitchens, and laundry facilities.
Healthcare & Aged Care – Hospitals and aged care facilities require consistent and hygienic hot water for patient care, cleaning, and sterilization.
Fitness & Recreation – Gyms, swimming pools, and sports centers benefit from high-temperature water for showers, spas, and pool heating.
Food & Beverage Processing – Breweries, dairies, and food production facilities rely on large-scale hot water for processing, cleaning, and sanitation.
Manufacturing & Industrial – Factories, textile plants, and pharmaceutical industries require reliable and efficient hot water for production processes.
Education & Public Facilities – Schools, universities, and government buildings can benefit from air to water CO₂ heat pumps to meet high daily hot water demands while reducing energy costs.

What temperature can the Q-ton air to water heat pump perform in?

The Q-ton air to water CO₂ heat pump can reliably deliver up to 90°C hot water in temperatures as low as -25°C. It can also maintain 100% capacity down to -7°C. This makes it ideal for commercial applications in colder climates that require reliable hot water even all year round.

How can I install an air to water CO₂ heat pump hot water system?

Installing an air to water CO₂ heat pump system such as the Q-ton requires assessment by a professional to ensure compatibility with your existing hot water setup. To find out more about cost savings, system configurations, and installation options, you can fill out the form above to download the brochure and one of our team will be in touch.

TECHNICAL SPECIFICATIONS

	A	B	C	D
1	Model			ESA30EH2-25
2	Power source			3 Phase 380V±5%, 400V±5%, 415V±5%, 50/60Hz
3	Operation to top up (Intermediate season)*1	Heating capacity	kW	30
4		Water amount	L/min	8.97
5		Power consumption	kW	6.98
6		COP	-	4.3
7	Operation to top up (cold season)*2	Heating capacity	kW	30
8		Water amount	L/min	5.06
9		Power consumption	kW	10.73
10		COP	-	2.8
11	Operating sound pressure (In intermediate season)*1, 3		dB(A)	58
12	Operating sound power (In intermediate season)*1		dB(A)	70
13	External dimensions (HXWXD)		mm	1690 x 1350 x 720 + 35 (water pipe connection)
14	Current	Maximum	A	21
15	Current	Starting	A	5
16	Unit weight		kg	Off: 375 During operation: 385
17	Colour			Sutcco white (4.2Y 7.5/1.1 Approx)
18	Compressor	Type x Pcs		Hermetic inverter compressor x 1
19	Compressor	Nominal output	kW	6.4
20	Refrigerant	Type		R744 (CO2)
21	Refrigerant	Charged amount	kg	8.5
22	Refrigerant Oil	Type		MA68
23	Refrigerant Oil	Charged volume	cc	1200
24	Crackcase Heater		W	20
25	Anti-freezing heater	For water pipe	W	21 x 3
26		For drain pan	W	40 x 2
27		For drain hose	W	16 x 3
28	Heat exchanger, air-side	Type		Copper pipe straight fin type
29	Heat exchanger, water side (gas cooler)	Type		Copper pipe coil, indirect heat exchanger
30	Heat exchanger, water side (gas cooler)	Possession quantity of water		10
31	Fan	Type		Axial flow type (direct coupled motor) x 2
32		Output x pcs	W	386 x 2
33		Air volume	m3/min	260
34		External static pressure	Pa	50
35	Water pump	Type x output		Non-self-suction spiral type inverter pump × 95W
36		Materials contacting water		PPS
37		Actual pump head	m (kPa)	5m (49kPa) @ 17Litre/min
38	Usage temperature range	Outdoor air temperature	°C	-25 to +43
39		Feed water inlet temperature	°C	Top up 5-35, Warm up 35-63
40		Hot water outlet temperature	°C	60 - 90
41	Water pressure range		kPa	500 or lower (Keep water pressure more than 0kPa at the inlet of heat pump water heater)
42	Defrost			Hot gas type
43	Vibration and sound proofing devices			Compressor ;placed on anti-vibration rubber and wrapped with sound insulation
44	Protection devices			High pressure switch over current protection, power transistor overheat protection and anomalous high pressure protection
45	Pipe connection	Feed water inlet		Rc3/4 (Copper 20A)*4
46		Hot water outlet		Rc3/4 (Copper 20A)*4
47		Drain water outlet		Rc3/4 (Copper 20A)*4
48	Design pressure		MPa	High pressure:14.0, Low pressure: 8.5
49	IP Code			IP24
50	1. Performance of operation to top up during intermediate season shows the capacity measured under the conditions that outdoor temp is 16°C DB/12°C WB, water inlet temp is 17°C and how water outlet temp is 65°C.
51	2. Performance of operation to top up in cold region shows the capacity measured under the conditions that outdoor air temperature is -7°C DB/-8°C WB, water inlet temperature is 5°C and hot water outlet temperature is 90°C excluding heater for anti-freezing water (191W).
52	3. Operating sound shows a value is measured at 1m in front of the unit and 1m above the floor in an echoic room where the sound is slightly resonated. Accordingly, if the unit is installed on an actual site, it is normal that the measured sound levels may be higher than the value shown above, due to surrounding noise and echo within the room.
53	4. Pipe size 20A=DN20=20mm=3/4in.
54	5. The actual hot water outlet temp may vary ±3°C from target temp according to the change of outdoor air temp and water inlet temp. If feed water inlet temp is 30°C of high and outdoor air temp is 25°C or higher the water temp may be controlled to ensure temp does not increase too much.
55	6. Ensure clean water is used. Water quality should follow the standard which MTH specifies. If the water quality if not up to standard it may cause issues within the unit such as scale build-up and/or corrosion.
56	7. These articles mentioned above may vary without notice accordingly to development status.
57	8. Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country. Electrical installation work must be executed according to the technical standards and other regulations applicable to the electrical installations in the country.