Air-to-water heat pump
It heats in winter, cools in summer, and produces hot water all year. A monobloc architecture with natural R290 refrigerant. The entire refrigeration circuit stays outside.
Three uses
It replaces more than a boiler.
Heating, cooling, and domestic hot water come from the same equipment and the same control logic, according to the season and household priorities.
Winter
Heating
Low-temperature underfloor heating, low- or medium-temperature radiators, and even older high-temperature emitters.
Winter
Heating
Low-temperature underfloor heating, low- or medium-temperature radiators, and even older high-temperature emitters.
Summer
Cooling
Cooling floor or fan coils, depending on the emitters in the install.
Summer
Cooling
Cooling floor or fan coils, depending on the emitters in the install.
All year
Domestic hot water
Hot-water production with a sized tank and dedicated control, run as a priority.
All year
Domestic hot water
Hot-water production with a sized tank and dedicated control, run as a priority.
Monobloc architecture
No refrigerant piping inside the house.
The entire R290 circuit is confined to the outdoor unit. Only water circuits enter the building. The circulator, expansion vessel, plate heat exchanger, filter, and flow control are already built into the unit.
Strengths
Designed for retrofit as much as new build.
Built-in electric backup
Depending on the variant, a 3, 6, or 9 kW backup takes over in cold peaks, with no extra equipment to plan.
Built for retrofit
Water flow up to 80 °C, held down to −10 °C outdoor: existing radiators can often stay in service.
Running down to −25 °C
Heating keeps working in the coldest conditions, with automatic defrost.
A+++ rated
The top European energy class, with a COP of 4.75 on the new generation.
28 dB(A) at three meters
The new generation gains 17% blade area and 39% heat-exchange area: more air moved, less noise.
Heat Pump KEYMARK certified
Independent tests and production control, under the European heat-pump certification scheme.
R290, under control
A natural refrigerant, under watch.
R290 has a global warming potential of 3, where common synthetic fluids sit in the hundreds. Its use is framed by a dedicated design, from chassis ventilation to leak detection.
- Gas-refrigerant separator
- Gas leak sensor
- Sealed electrical enclosure
- Dedicated ventilation channel
- Triple leak detection
- Refrigeration circuit confined outdoors
- Automatic defrost
- Anti-freeze protection
Control & operation
One interface for the whole install.
Flow temperatures, operating modes, domestic-hot-water priority: everything is set in the same place, on the local control or from the Colyso app.
Integration
Wi‑FiModbusSG ReadyOTA / USB update3 zones + domestic hot water
Distinct weather compensation per zone and hot-water priority, from the same interface.
Cascade up to 8 units
Several heat pumps run together and share the load, for the highest demand.
7-inch touchscreen
On the new generation: guided commissioning, direct setup, and built-in Wi‑Fi module.
Smart Life app
Heating, cooling, and hot-water modes, scheduling, consumption and COP tracking, remote supervision.
Install & follow-up
Less time on site, more follow-up.
The monobloc simplifies fitting; commissioning validates it and opens the warranty. It’s done by Colyso or an approved partner.
A hydraulic and electrical fit
No refrigerant piping to run: the install focuses on water connections and the electrical panel.
Hydraulics built in
Inverter circulator, expansion vessel, plate heat exchanger, filter, and flow control are already in the unit.
5-year parts
Validated commissioning opens the 5-year commercial warranty on all parts, excluding labor and call-out.
Parts shipped within 48 h
Shipped within 48 business hours after a validated diagnosis, subject to stock.
Specifications & documentation
The numbers that matter.
Performance
- Rated capacity
- 4 to 16 kW
- SCOP at 35 °C
- up to 5.78 — A+++ class
- SCOP at 55 °C
- up to 4.35 — A+++ class
- COP
- up to 4.75 (new generation)
Operating range
- Heating
- −25 °C to +35 °C outdoor
- Cooling
- −5 °C to +46 °C outdoor
- Max water flow
- 80 °C
- Sound pressure
- from 28 dB(A) at 3 m
Architecture
- Type
- Monobloc — outdoor refrigeration circuit
- Refrigerant
- Natural R290 (GWP 3)
- Water connection
- R5/4" · Inverter circulator, 9 m head
- Power supply
- 220-240 V single-phase or 380-415 V three-phase
Control
- Zones
- 3 zones + domestic hot water
- Cascade
- up to 8 units
- Electric backup
- +3 kW (single-phase) · +6 or +9 kW (three-phase)
Warranty
- Commercial warranty
- 5-year parts, validated commissioning
Certifications
- Heat Pump KEYMARK
- A+++ at 35 °C
- R290 · GWP 3
- SG Ready
Documentation
Frequently asked questions
What you want to know before you start.
Retrofit, refrigerant, deep cold, warranty: straight answers.
Often yes. The heat pump produces water up to 80 °C, held down to −10 °C outdoor, which makes it compatible with high-temperature radiators. That doesn’t replace a heat-loss calculation or a check of emitter capacity, done during the study.
It’s a natural refrigerant with a global warming potential of 3, versus several hundred for common synthetic fluids. The monobloc architecture confines it entirely to the outdoor unit, and four protection layers frame it: gas-refrigerant separator, leak sensor, sealed electrical enclosure, and a dedicated ventilation channel.
Heating still runs down to −25 °C outdoor, with automatic defrost. Efficiency depends on the water regime chosen, outdoor conditions, and how the install is sized.
Yes. The heat pump produces domestic hot water with a tank sized for the household and dedicated control, which prioritizes hot water over heating. Volume and hydraulic decoupling are set by the study.
The Colyso commercial warranty is 5 years on all parts, excluding labor and call-out. It sits on top of statutory warranties. It activates on four conditions: install by a qualified professional, Colyso or approved-partner commissioning, product and serial-number registration, and maintenance per the instructions.
From the local control (7-inch touchscreen on the new generation, wired control on other capacities) and from the Smart Life app via the built-in Wi‑Fi module: modes, scheduling, consumption and COP tracking, remote supervision. Modbus and SG Ready interfaces allow integration into a wider install.
What emitters do you have today?
Radiators, underfloor heating, a boiler to replace: the study starts from what is already there. You’ll be put in touch with an approved Colyso installer near you.