Hybrid system in an apartment building
Apartment house modernisation
The greatest challenge must surely be that the work is being conducted while the tenants are present. The construction work must kept within certain limits and preferably should be confined to the boiler room in the cellar.
Furthermore, hot water requirements and peak loads fluctuate very strongly due to the large number of tenants. So both heating systems must be capable of mitigating the effects of these high demands.
Last but not least, the insulation of the building is very good but there have been problems with mould in a few of the residential units in the past. This could be prevented by installing a ventilation system.
Reasons for using the proposed new components
The old gas heating boiler is 15 years old and is being replaced by a modern condensing appliance. Many owners use their heat generators for much longer than this, but they are considered to be technologically obsolete after 15 years. For this reason, the landlords can expect the new appliances to be more efficient. This alone saves fuel and reduces heating bills. The new boiler will also be less prone to malfunction.
A heat pump heating system is integrated at the same time. This updates the entire heating system and makes it more environmentally friendly. It also works particularly efficiently when used with heat distribution systems that only require low flow temperatures and if the walls are well insulated. The building already fulfils both of these requirements.
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Additional comfort and environmental protection
The new condensing appliance combined with environmental heat reduces the consumption of fuel. In addition to lowering costs, this also produces fewer exhaust gases that are harmful to the climate.
The owners are considering adding a solar electricity system on the roof in the future. The heat pump heating system would then use only renewable energy sources and would further improve the ecological footprint of the entire system. So the landlords will have achieved their objective of modernising their building without the construction work inconveniencing the occupants too badly.