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Protherm Lynx Condens 18/25 MKV 19.1 kW

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Energy source: gas; Installation: wall; Type: dual-circuit (heating and DHW); Heating area (m²): 153; Condensing; Heat output (kW): 19.1; Rated current (A): 2; Coolant max. T (°C): 75; DHW min. T (°C): 35; DHW max. T (°C): 60; Warm start; Control bus: eBus; Efficiency (%): 104; Combustion chamber: closed (turbocharged)
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Protherm Lynx Condens 18/25 MKV 19.1 kW
19.1 kW
26.5 kW
Energy source:gas
Mount:wall, dual-circuit
Boiler power:19.1 kW, area ~ 153 m²
Combustion chamber:closed, flue 60/100, 80/125 mm
DHW temperature:from 35 °С, up to 60 °С
High efficiency. Convenient management. Hot start function. Undemanding to water hardness and gas quality.
All specifications
Specifications Lynx Condens 18/25 MKV
Main
Energy sourcegas
Installationwall
Typedual-circuit (heating and DHW)
Heating area153 m²
Condensing
Technical specs
Heat output19.1 kW
Min. heat output5.3 kW
Power supply230 В
Power consumption86 W
Rated current2 А
Coolant max. T75 °С
Heating circuit max. pressure3 bar
DHW circuit max. pressure10 bar
Consumer specs
DHW min. T35 °С
DHW max. T60 °С
Performance (ΔT ~30 °C)10.4 L/min
"Summer" mode
Warm start
Circulation pump
Control buseBus
Boiler specs
Efficiency104 %
Combustion chamberclosed (turbocharged)
Flue diameter60/100, 80/125 mm / 80/80 mm for separate /
Inlet gas pressure13 mbar
Max. gas consumption2.7 m³/h
Expansion vessel capacity8 L
Heat exchangeraluminium
Connections
Mains water intake3/4"
DHW flow3/4"
Gas supply1/2"
Central heating flow3/4"
Central heating return3/4"
Safety
Safety systemsgas pressure drop
water overheating
flame loss
draft control
frost protection
More specs
Dimensions (HxWxD)700x390x280 mm
Weight31 kg
Added to E-CatalogApril 2016
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Protherm 2025 - new arrivals, bestsellers, and the most relevant models Protherm.
FAQ: 10 frequently asked questions about heating boilersAnswers to common questions in the section "heating boilers"
Model overview based on user reviews  
The Protherm Lynx Condens 18/25 MKV 19.1 kW is a wall-mounted, dual-circuit gas boiler known for its high efficiency and compact design, making it suitable for heating and water heating in spaces up to 153 m². Users appreciate its quiet operation and energy-saving capabilities, with some noting significant reductions in gas bills. The boiler features a convenient control panel and a hot start function for quick hot water access. Safety is a priority, with multiple protective features like flame and draft control, frost protection, and more. However, some users have reported issues with the circulation pump's noise and expensive spare parts. Overall, it is a reliable choice for those seeking a space-efficient and economical heating solution.
Pros

Cons

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3
0
2
crane do not recommend
21 December 2018 
I use 15 months. A little more economical than its predecessor TechnoTherm by 5 percent. The electrical part of the circulation pump is buzzing. In this model, it is a new single-speed, left-hand rotation. Replaced under warranty didn't help. When it works, it feels like the vacuum cleaner in the next room was turned on. During the day it is still tolerable, but at night you can go crazy. Repair of the boiler is in the stage of struggle with the manufacturer's representatives. There are still 7 months of warranty left. There are 4 more boilers in the service with the same defect.
Condensing
Zadolbal!
use Protherm Lynx Condens 18/25 MKV more than year
great model, love it
5 October 2018 
We use the "Protherm Lynx" boiler. The boiler came to us "by default," installed by the developer in our new apartment. The boiler is wall-mounted, installed in the kitchen, and is dual-circuit, providing both heating and water heating in one unit. Very convenient, and on the plus side, it takes up very little space and does not spoil the interior. It heats well; in three winters we haven't been cold once, and it heats the water reliably too.
High level of safety, flame and chimney draft control, low pressure sensor, safety valve, water flow sensor, thermal fuse, frost protection and pump jam protection.
Not found.
use Protherm Lynx Condens 18/25 MKV more than year
7 months flight normal
20 April 2019 
In the fall, I bought a Protherm "Lynx" condensing boiler on the recommendation of an acquaintance. My old boiler had worked for about eight years and recently had been causing regular issues with repairs and maintenance. My friend’s "Lynx" has already been in operation for its third season, and after comparing my gas bill to his, I came to a disappointing conclusion: all this time, I was overpaying "OOO Gazprom" by almost a quarter. Over the years, this added up to a rather substantial amount, close to the cost of a new boiler. The "Lynx" replaced the old boiler with minimal adjustments. It has a high efficiency, close to 100%. In operation, the boiler is quiet, much quieter than the old model. The "Lynx" has been running for seven months already, without any technical problems. I compared the new bills with last year’s receipts, and the savings amounted to about 5-6 thousand rubles. Considering the general interest in ecology and energy-saving technologies, this is a plus for the condensing boiler.
display, albeit not very large, as well as push-button controls - the previous one had levers, I can’t say in comparison that it was convenient
well, I didn’t really like the price
use Protherm Lynx Condens 18/25 MKV few months
3 out of 5 user review(s) shown
2 more user review(s)

The Czech company Protherm is part of the Vaillant Group, one of the world leaders in the heating systems market. The condensing boiler with the attachment "Lynx" provides efficient heating of a dwelling up to 150 m² and is endowed with the function of preparing hot water.

Undemanding

The numbers 18/25 in the model index indicate the maximum power of heating and water heating, respectively (measured in kW). The older colleague (Protherm Lynx Condens 25/30 MKV) has a slightly higher power, making it suitable for houses over 200 m². The boiler heat exchanger is made of aluminium-silicon alloy, and the hot water circuit is made of stainless steel. The model is completely undemanding to the quality of gas and water hardness, and the absence of thin tubes in its design eliminates clogging of the ducts with small debris.

Integration

The boiler is able to maintain the maximum temperature of the coolant at 75°C, and hot water — 65°C. Moreover , the “hot start” function allows you to get warm water in just a couple of seconds after the start of water intake. The levels of heating water and coolant are set using a convenient control panel with an electronic display for displaying information. You can also completely trust automation — the built-in eBus bus allows you to integrate the boiler into a heating system with control elements based on Protherm thermostats.

High reliability

The safe operation of the boiler is guaranteed by many protective functions: the model is not afraid of freezing and overheating, and special sensors monitor the presence of flame and draft in the chimney. It is worth noting that the manufacturer scrupulously approaches testing of its products at the production stage — Protherm Lynx Condens 18/25 MKV, like all its counterparts, is tested at the factory for more than 300 parameters. So you don’t need to worry about the reliability of the device — the satisfied reviews of the real owners of the model are a clear confirmation of this.