Knowledge
Engineering knowledge
Answers to the key heating, gas, ventilation and cooling questions – with calculators and 3D explanations.
KnowledgeWhat size heat pump does a 150 m² house need?Heat pump output cannot be set from floor area alone. The same 150 m² house may need 6…
KnowledgeGas or heat pump: what to choose in 2026?If mains gas is already connected and the house is older, a condensing boiler is often the cheapest…
KnowledgeRadiators not heating: the most common causesIf a radiator is warm only at the top – there is usually air in the system. If…
KnowledgeWhich heat recovery unit does a 120 m² house need?Most 120 m² houses need a unit that quietly delivers about 150–220 m³/h with spare capacity for boost.…
KnowledgeNatural gas price for householdsThe current natural gas price for households heating with gas (group II) is shown below from our price…
KnowledgeGas pipeline installation: what to knowGas installation is a regulated process: connection conditions, design, external and internal works, tests and documents. Only certified…