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CHA Monoblock air-to-water heat pump 16/20, 20/24

Efficient, quiet and designed for large-scale applications up to 100 kW

With the CHA Monoblock series, replacing your heating system has never been easier. Ideal for renovating larger properties such as apartment buildings, it enables a direct switch from oil or gas heating to a future-proof monoblock heat pump – efficient, powerful, and using the environmentally friendly refrigerant R290 (propane).

CHA16/20

CHA20/44

Thanks to high flow temperatures, a robust monoblock design, and a comprehensive range of accessories, the CHA Monoblock is easy to install – ensuring maximum comfort and reliable, long-lasting operation, even in new buildings.

Easy modernization: Direct switch from oil or gas heating to a future-proof heat pump
Ideal for larger properties: Perfect for renovations in apartment buildings and existing structures
Top efficiency: High flow temperatures and powerful monoblock design
Fast & secure installation: Comprehensive accessory range for smooth assembly
Sustainable & future-proof: Operates with the environmentally friendly refrigerant R290 (propane)

Overview of benefits

Become part of the energy revolution and opt for the successful CHA Monoblock, which has proven itself thousands of times over.

Nine good reasons for choosing the
new CHA Monoblock heat pump

Natural and efficient with R290

The natural and environmentally friendly refrigerant R290 (propane) allows higher flow temperatures, which makes it very well suited for existing buildings. R290 guarantees efficient, sustainable and future-proof operation.

Low noise levels – peace and quiet in the neighbourhood

Numerous technical details such as a slowlyrotating fan and installation of the components in a sound-insulating EPP core ensure that noise from the heat pump disturbs neither operators nor neighbours.

Flexible connection

The hydraulic connection can be made on the bottom or at the rear without additional accessories – depending on structural conditions and customer requirements. The conversion is mplemented directly at the construction site within a very short time.

Save time at the construction site

Easy transport thanks to integrated crane hook receivers in the outdoor unit. Additional practical accessories available such as prefabricated foundations, ready-made electrical subdistribution, hydraulic connection solutions and much more.

Sturdiness and smooth operation

Designed for a long service life: With a robust housing and a UV-resistant powder coating, the heat pump copes with even the toughest environmental conditions. The raised base ensures smooth operation in high snowfall regions at all times.

Reliable failure protection and large power reserve

The demand-controlled heating element with 9 kW serves as a reliable power reserve and ensures defrosting energy. For CHA-16/20 and 20/24, a version without electric heater is also available upon request.

Online convenience

Thanks to the WOLF Link home interface module (always included ex works), you can keep an eye on your customers' systems at all times via the Internet. This makes it easy to read the status of the system and optimise settings without costly travel.

Pure heat pump output up to 100 kW

Can be used in any project as a cascade with up to five units. Efficient modulation ensures low noise, maximum economy and operational reliability with pure heat pump performance.

Take advantage of self-produced electricity

Use excess electricity for heating, preparing hot water or even cooling in summer. A two-wire cable is all it takes to connect to the inverter with PV output. This increases independence from the grid.

Performance specifications

CHA-Monoblock

A-7/W35 max. output

16,7

19,6

A7/W35 rated output / COP to EN 14511

kW / -

7,3 / 5,6

8,7 / 5,6

A2/W35 rated output / COP to EN 14511

kW / -

9,9 / 4,6

12,3/ 4,4

A-7/W35 rated output / COP according to EN14511

kW / -

11,9 /3,2

15,1 / 3,1

A35/W18 cooling capacity range

7,2 - 16,4

19,6

Max. flow temperature in pure heat pump operation

°C

Sound power level day max. / reduced night operation / ErP

dB(A)

65 / 56 / 52

66 / 58 / 53

Seasonal central heating efficiency 35°C (ETA_s / Prated / SCOP) at average climate conditions.

% / kW / -

215 / 14 / 5,46

205 / 18 / 5,2

Seasonal central heating efficiency 55°C (ETA_s / Prated // SCOP) at average climate conditions.

% / kW / -

154 / 15 / 3,92

152 / 18 / 3,88

Refrigerant type / GWP

- / -

R290 / 0,02

Refrigerant charge / CO2 eq.

kg / kg

3,8 / 0,08

Operating limits for supply air heating & hot water / cooling

°C

-22 bis +40 / +10 bis +45

Energy efficiency class, central heating, low temperature

A+++ ➔ D

A+++

Energy efficiency class, central heating, medium temperature

A+++ ➔ D

A+++

Dimensions of outdoor unit (W x H x D)

1.700 x 1.300 x 756

Dimensions of indoor unit (W x H x D)

440 x 790 x 340

Weight of outdoor/indoor unit

230 / 27

Electrical connection for outdoor unit

400

Max. power electric immersion heater

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Performance specifications

CHA-Monoblock

CHA-16/20
CHA-20/24

A-7/W35 max. output (kW)

16,7

19,6

A7/W35 rated output / COP to EN 14511 (kW / -)

7,3 / 5,6

8,7 / 5,6

A2/W35 rated output / COP to EN 14511 (kW / -)

9,9 / 4,6

12,3/ 4,4

A-7/W35 rated output / COP according to EN14511 (kW / -)

11,9 /3,2

15,1 / 3,1

A35/W18 cooling capacity range (kW)

7,2 - 16,4

19,6

Max. flow temperature in pure heat pump operation (°C)

Sound power level day max. / reduced night operation / ErP (dB(A))

65 / 56 / 52

66 / 58 / 53

Seasonal central heating efficiency 35°C (ETA_s / Prated / SCOP) at average climate conditions. (% / kW / -)

215 / 14 / 5,46

205 / 18 / 5,2

Seasonal central heating efficiency 55°C (ETA_s / Prated // SCOP) at average climate conditions. (% / kW / -)

154 / 15 / 3,92

152 / 18 / 3,88

Refrigerant type / GWP (- / -)

R290 / 0,02

Refrigerant charge / CO2 eq. (kg / kg)

3,8 / 0,08

Operating limits for supply air heating & hot water / cooling (°C)

-22 bis +40 / +10 bis +45

Energy efficiency class, central heating, low temperature (A+++ ➔ D)

A+++

Energy efficiency class, central heating, medium temperature (A+++ ➔ D)

A+++

Dimensions of outdoor unit (W x H x D) (mm)

1.700 x 1.300 x 756

Dimensions of indoor unit (W x H x D) (mm)

440 x 790 x 340

Weight of outdoor/indoor unit (kg)

230 / 27

Electrical connection for outdoor unit (V)

400

Max. power electric immersion heater (kW)

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Systems and components

For air-to-water CHA Monoblock

CWL-2 mechanical ventilation unit

The quietest WOLF mechanical ventilation unit ever
Genuine flow rate measurement for constant air flows
Bypass, automatic antifreeze control and maintenance-free condensate management as standard
Passive house certificate and application submitted for DIBt approval

WOLF and Alexa: a smart team

With Amazon’s digital assistant Alexa
For innovative WOLF heating and mechanical ventilation products
Control has never been this easy
“Alexa, turn the heat on”
“Alexa, switch on intensive ventilation”

All CHA heat pumps now come standard with the free WOLF Link!

Starting in 2025, every WOLF CHA heat pump will be equipped with the WOLF Link interface module as standard – at no additional cost! This makes the heat pumps internet-ready and allows easy connection to the Smartset app. Look forward to smart control, efficient energy optimization, and maximum comfort – all seamlessly integrated.

WOLF accessory solutions

Quick and simple installation

In addition to our premium products, WOLF also offers the necessary accessories for optimum installation of our appliances.

Accessories

Prefab foundation

No concrete work required
Simple and time-saving solution for foundation construction
Tested, ready-to-use solution from the factory
Tailored solution for each outdoor unit
Practical fixing points for easy alignment of the optionally available WOLF connection solution

Accessories

Prewired electrical sub-distribution unit

Perfect for existing buildings
Contains all key components for BAFA-compliant installation
Easy to connect on-site using terminal blocks and row terminals
Fast and error-free surface-mounted installation, factory-tested
Includes RCD Type B, electricity meter with S0 interface, circuit breaker, and Type 2 surge protection

Accessories

Hydraulic connection solutions

Gas-tight, pressure-tight, radon-tight
Wall entry
Basement entry (lengths: 3 m, 5 m, 10 m, 15 m, 20 m)
Floor slab entry (lengths: 5 m, 10 m, 15 m, 20 m)
Easy installation with flexible stainless steel corrugated pipe

Now with KEYMARK certification

The Heat Pump KEYMARK is a voluntary, independent European certification mark (ISO type 5 certification) for all heat pumps, combi heat pumps and water heaters (as covered by the Ecodesign Directive, EU Regulation 813/2013 and 814/2013). It is based on independent, third-party testing and demonstrates compliance with product requirements in accordance with the Heat Pump KEYMARK scheme rules and with efficiency requirements stipulated by the Ecodesign Directive.