Boiler design
Newly developed high-performance stainless steel heat exchanger X
Extremely compact and exceptionally powerful, making it highly efficient and responsive. It impresses with its high level of safety and durability.
Intelligent combustion technology X
Electronic, self-adjusting fuel-air system with fuel adaptability (1:10 modulation).
Interior lighting for maintenance and service work X
Turns on automatically when the front cover is opened and remains lit even when the device is powered off.
Integrated heating fittings X
Electronically controlled high-efficiency pump, 10-liter expansion tank, quick-release air vent, safety valve, diverter valve for domestic hot water production.
Clean, uncluttered design with improved accessibility X
Flexible installation and particularly easy to install, making it ideal for heating system retrofits.
High-efficiency pump X
It automatically adjusts its output to match actual heating needs, making it particularly energy-efficient.
Operating unit X
Boiler control panel with a large, easy-to-read plain-text display.
Cogent to the smallest detail
- Switches on automatically when the front cover is opened and lights up even when the appliance is without power.
- Flexible installation and particularly easy to install, making it ideal for modernising heating systems.
- Optionally available with or without built-in fittings – expansion tank, energy-saving circulation pump, valve for hot water tank.
- It is especially compact and has outstanding performance power, making it superbly efficient and responsive. Impressively high reliability and durability.
- Ensures the best use of energy and virtually residue-free combustion. The integrated sound and heat insulation also makes its operation particularly quiet.
- Automatically adjusts its output to the actual heating requirements and is therefore especially economical.*
- All important information can be called up at the touch of a button. The display changes colour depending on the operating status.
* for MultiWIN2 Plus 152-252 incl. heating fittings
The advantages at a glance
+ DURABLE: Thanks to high-quality, low-maintenance stainless steel heat exchangers with up to a 10-year material warranty.
+ FUTURE-PROOF: Certified for blending with up to 20% hydrogen and biogas.
+ EFFICIENT: Maximum efficiency thanks to condensing technology and 1:10 modulation.
+ EASY TO USE: Features an LED display with rotary and push buttons
Technical data
The MultiWIN4 is available in a total of six different versions.
MultiWIN4 155 - 354
| Type | MW 154 | MW 254 | MW 354 | MW 254 Kombi | |
| Rated thermal output (80/60°C) | kW | 3,0 - 15,0 | 2,5 - 25,0 | 3,5 - 35,0 | 3,0 - 25,0 |
| Rated thermal output (50/30°C) | kW | 2,2 - 16,3 | 2,8 - 27,2 | 3,8 - 38,1 | 3,3 - 27,2 |
| Rated heat output for hot water operation (combination boiler) | kW | - | - | - | 30 |
| Duty cycle | 1:7,5 | 1:10 | 1:10 | 1:8,3 | |
| Exhaust pipe diameter | mm | 80/125 | 80/125 | 80/125 | 80/125 |
| Efficiency at rated load Hi – at 100% load, 50/30°C | % | 105,8 | 105,8 | 105,8 | 105,8 |
| Boiler Weight | kg | 31 | 31 | 32 | 33,5 |
| Noise emissions | db(A) | 49 | 51 | 51 | 51 |
| Max. electrical power consumption | W | 59 | 70 | 90 | 79 |
| Energy efficiency class | A | A | A | A | |
| Water Heating Energy Efficiency Class | A (XL tap profile) |