Modernising an apartment building inexpensively

Apartment house modernisation

The building was constructed 20 years ago. The thermal insulation is sufficient. But the owner wants to replace the old oil boiler with a current model.
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The owner of the house wants to keep the costs as low as possible and therefore does not want to install completely new regenerative heating technology. He only wants to replace what is necessary.
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New heating system with lower fuel consumption

The apartment block consists of six residential units. The landlord wants to modernise the heating technology as simply as possible. Read on to find out how he approaches the project and which systems he chooses.

Judicious modernisation

The landlord knows that oil heating systems do not have any long-term future. But it is still possible to install modern condensing boilers during renovation projects or in new buildings. Due to his positive experiences with his existing oil heating system, he would prefer to remain with an oil based solution – they have proven their worth to him, and this would be the simplest way to replace the system.

The challenges of the project

The landlord considers using the roof of the building to install an additional solar heating system. The building already has adequate thermal insulation. This is a good basis for being able to operate the future heating system at low cost. Furthermore, the owner looks at having a ventilation system installed during the modernisation project.

Reasons for choosing the new technology

The existing heating appliance is being replaced after approximately 20 years of operation with a new condensing boiler. The system concept also includes a solar thermal installation integrated into the heating and domestic hot water system.

The solar thermal system is designed to contribute to domestic hot water generation as part of the overall system configuration. Depending on the building design and system configuration, solar thermal technology can be integrated with the heating system. Information on available funding programmes should be reviewed according to the applicable regional requirements.

The products for the project

The owner often heard planners and domestic technology experts mention products made by the company WOLF during discussions. As the products can be combined and have good reputations, the owner decides to follow these recommendations.

COB-2 oil condensing boiler

This appliance represents the latest generation of this tried-and-tested technology. It burns more efficiently than older oil appliances.

A particular advantage: the boiler is especially optimised for use in hybrid systems. The model with 40 kW of output is suitable for the apartment block.

F3-1 flat-plate collector

This collector is very popular for use in solar heating systems thanks to its excellent value for money and robust construction.

CWL-D-70 ventilation unit

These decentralised appliances are ideal for renovation projects as they can be installed separately in individual rooms.

They use the countercurrent principle to supply fresh air without causing draughts and without losing great amounts of heat. They also counteract mould formation in the interiors.

Support for Your Home Project

Choosing a heating, ventilation or energy system for a home can involve a range of technical and project-related considerations. WOLF provides information and planning resources to support the assessment of different system options and project requirements.

Positive effects even without changing the system

As this example shows, even a modest modernisation project that does not change the entire heating system can have noticeably positive effects. Especially if the developer integrates additional modern components and creates a hybrid system in this way. This can be best achieved by obtaining all components from a single supplier so that they can be combined with one another.