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Junkers Bosch  |  SKU: CALD_1953_coassiale

JUNKERS CONDENS 2000 W ZWB24-1RE Methane or LPG Condensing Boiler Complete with Fume Exhaust Kit - Erp

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Technical features

  • Heating and DHW energy efficiency class (ErP)
  • For heating and domestic hot water production
  • Forced draft sealed chamber
  • Declared load profile: L
  • Nominal heat output: 24 kW
  • Max. nominal heat input in heating: 25 kW
  • Seasonal space heating energy efficiency: 88%
  • Continuous sanitary production: 10.5 l/min
  • Dimensions (Depth x Width x Height): 355 x 440 x 725 mm; 37kg
  • Version: METHANE


Condensation efficiency at the best quality/price ratio

Condens 2000 W is a condensing boiler with instant domestic hot water production, powered by methane and convertible to LPG.

The Condens 2000 W wall-mounted gas condensing boiler guarantees you the energy efficiency of condensation at an unbeatable price: with this boiler the savings start from the purchase and will also be evident in subsequent gas and electricity bills.

Convenient from all points of view

With an energy production of up to 25.6 kW, Condens 2000 W is the ideal efficient and convenient solution for single-family and semi-detached homes. This boiler is designed to last over time, thanks to the robust bithermic stainless steel lamellar heat exchanger and the 1:3 modulation range, which allows you to reduce the number of times the burner starts, increasing the efficiency of the boiler and ensuring a longer life. To further reduce heating and domestic hot water production costs, Condens 2000 W is already ready for integration with a solar system: so, in addition to saving money, you do good for the environment.

Simple and economical installation and maintenance

Thanks to the compact dimensions of just 355x440x725 mm, the reduced weight (37 kg) and the 8 liter heating side expansion vessel already integrated at the rear, Condens 2000 W can be installed with great ease even in the smallest spaces. Thanks to the distance of the connections from the wall of 50 mm, installation is quick and easy. Programming the boiler is also extremely easy, thanks to the intuitive LCD display, which shows all the necessary information and any codes in the event of a malfunction, and the possibility of remote control via the TRZ 12-2 On/Off digital room chronothermostat.


  • Wall-mounted condensing gas boiler in combined version for instantaneous production of domestic hot water, powered by methane and convertible to LPG
  • High sanitary comfort: according to UNI EN 13203 for the production of domestic hot water
  • Easy to install and maintain thanks to the three-part casing: front cover, side panels and visible control panel
  • Robustness and maximum use of energy, thanks to the integrated bithermal exchangers, the primary in stainless steel and the secondary fume recuperator in aluminium-silicon alloy
  • The power adapts to your real needs, thanks to the modulating gas valve/fan group
  • Extremely silent operation with noise emissions lower than 36 dB(A)

The ErP regulation and the new energy labels

The future of heating systems

Starting from 26 September 2015, in order to be placed on the market, heating and hot water systems must comply with the ErP (Energy Related Products) regulations issued by the European Union. The ErP standards promote the eco-friendly design of products that consume energy from fossil fuels and have the aim of reducing energy consumption and CO2 emissions, as well as providing consumers with transparent and homogeneous information on the energy efficiency of appliances, encouraging their comparison. Regulations N 811/2013 and 812/2013 provide for specific energy labeling of appliances for heating and the production of domestic hot water. Regulations N 813/2013 and 814/2013 prescribe, among other things, the minimum energy efficiency and polluting emissions requirements that manufacturers of heating and domestic hot water production equipment must comply with. These regulations therefore raise energy efficiency standards, improving the performance of systems and excluding less performing technologies from the market.

The energy label will be supplied by the manufacturer with the appliance and will represent a concrete help for the consumer, allowing him to learn more about the characteristics of the system, become more aware of the energy savings allowed and make the best choice of what to buy. The energy label will provide information on the energy class of the product, on a scale between A++ and G, and on other additional notations, such as power and noise emissions.

The ErP regulation provides two types of labelling:

the first is supplied by the manufacturer together with the product for heating and/or domestic hot water production appliances
the second for systems composed of multiple elements.

In this second case the label indicates the energy efficiency levels achievable thanks to all the components used, allowing the increase in the score attributed to each appliance and increasing the energy class of the system: it is therefore the task of those who create/install the system to provide the correct explanatory label to the consumer.

The ErP standards represent an opportunity to develop a market for high-efficiency technologies, such as condensation, heat pumps, solar thermal, cogeneration and the integration of different energy sources into a single system. These technologies will have an impact on home consumption, approximately 80% of which is due to heating and the production of hot water, and are already incentivized at a fiscal level today.

Junkers Bosch is already in line with the dictates of the ErP regulation, demonstrating the orientation towards the future that has always characterized the brand.

Product Warranty: All products on sale on our site are new and packaged. The warranty on this item is 24 months from the date of purchase.

Scheda Tecnica

  • peso: 35.0 kg
  • classe energetica produzione acs: A
  • classe energetica riscaldamento: A
  • gas: Methane/LPG
  • marca: Junkers Bosch
  • metri quadri : 120
  • modello: CALD_1953
  • potenza in kw: 24
  • potenza nominale: 24
  • superficie riscaldabile mq: 120
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