https://en.poradnikpomp.com/ https://en.poradnikpomp.com/annual-service-heat-pump.htmlhttps://en.poradnikpomp.com/img/annual-service-heat-pump.pngAnnual service of a heat pump: what is checked, how often and what you should get for the money (2026)Do not treat “one visit per year” as a maximum: a heat pump in a dusty field, near a poplar line or next to a maize field may need the coil cleaned twice. https://en.poradnikpomp.com/cleaning-the-heat-exchanger-and-fan.htmlhttps://en.poradnikpomp.com/img/cleaning-the-heat-exchanger-and-fan.pngCleaning the heat pump heat exchanger and fan yourself — when and how (2026)Cleaning restores the performance the installation had after commissioning; it does not make the pump better than it was. https://en.poradnikpomp.com/defrost-cold-weather.htmlhttps://en.poradnikpomp.com/img/defrost-cold-weather.pngHeat pumps in freezing weather: what defrost looks like, what is normal at −10 °C, and when to act (2026)In winter, moisture in the outdoor air freezes onto the coil that is colder than the air. https://en.poradnikpomp.com/dynamic-tariffs-offpeak-heating.htmlhttps://en.poradnikpomp.com/img/dynamic-tariffs-offpeak-heating.pngDynamic tariffs and a heat pump: when off-peak heating actually pays (2026)Heating a building is not an instant job: the walls, floor and water in the installation store heat. https://en.poradnikpomp.com/expansion-vessel-diaphragm-failure.htmlhttps://en.poradnikpomp.com/img/expansion-vessel-diaphragm-failure.pngExpansion vessel failure: the pressure symptoms, the two-minute test and how to buy the right replacement (2026)Water expands when heated. In a closed heating loop that expansion has nowhere to go unless a vessel with an air cushion (separated by a membrane) absorbs… https://en.poradnikpomp.com/heat-pump-cop-scop-seer-explained.htmlhttps://en.poradnikpomp.com/img/heat-pump-cop-scop-seer-explained.pngCOP, SCOP and SEER explained: how to compare heat pump ratings without being fooled (2026)A rated SCOP is not a claim invented by marketing: it comes from testing the machine at several outdoor temperatures (typically mild, moderate and cold… https://en.poradnikpomp.com/heat-pump-error-codes-first-responses.htmlhttps://en.poradnikpomp.com/img/heat-pump-error-codes-first-responses.pngHeat pump error codes: what they really mean, the universal first response, and the pattern that matters (2026)A code alone never justifies replacement. The decision comes from the pattern: repeated failures on an out-of-warranty machine, a leak in a sealed… https://en.poradnikpomp.com/heat-pump-size-calculator.htmlhttps://en.poradnikpomp.com/img/heat-pump-size-calculator.pngHeat pump size calculator: an indicative kW figure for your house, with the assumptions visibleThis is a tool for the conversation with an installer, not a design. https://en.poradnikpomp.com/heat-pump-wont-start-checklist.htmlhttps://en.poradnikpomp.com/img/heat-pump-wont-start-checklist.pngHeat pump won't start: the checklist that answers most cases before you pay for a visit (2026)When a heat pump refuses to start, the machine is usually following its own protection logic rather than failing outright. https://en.poradnikpomp.com/heating-costs-season-120m2.htmlhttps://en.poradnikpomp.com/img/heating-costs-season-120m2.pngWhat a heat pump costs to run in one heating season: worked ranges for a 120 m² house (2026)Using the renovated-house example: 12 000 kWh of heat is about 13 300 kWh of gas at a 90 % boiler, roughly 1 300 m³. https://en.poradnikpomp.com/how-to-size-a-heat-pump.htmlhttps://en.poradnikpomp.com/img/how-to-size-a-heat-pump.pngHow to size a heat pump for your house (kW) — the method without magic numbers (2026)Often, yes: the heat pump carries the base load and the existing boiler covers the coldest days. https://en.poradnikpomp.com/pressure-drop-heat-pump-system.htmlhttps://en.poradnikpomp.com/img/pressure-drop-heat-pump-system.pngPressure dropping in a heat pump system: what is normal, what you may fix, when to call (2026)A properly filled and bled loop keeps its pressure inside a narrow window all year. https://en.poradnikpomp.com/underfloor-heating-vs-radiators.htmlhttps://en.poradnikpomp.com/img/underfloor-heating-vs-radiators.pngUnderfloor heating vs radiators with a heat pump — which is more efficient (2026)Now the cost: installing underfloor in an occupied house (demolition, insulation, screed, new floor finishes) typically runs to tens of thousands of euros… https://en.poradnikpomp.com/water-quality-heat-pump-systems.htmlhttps://en.poradnikpomp.com/img/water-quality-heat-pump-systems.pngWater quality in a heat pump system: hardness, corrosion, inhibitors and what actually harms the loop (2026)An air-source heat pump is only as good as the water that carries its heat. https://en.poradnikpomp.com/what-makes-up-the-installation-cost.htmlhttps://en.poradnikpomp.com/img/what-makes-up-the-installation-cost.pngWhat makes up the heat pump installation cost — what must be in the quote (2026)The expensive part is never the quote, it is the correction afterwards: swapping to a larger pump in spring, adding a buffer after one winter, calling an… https://en.poradnikpomp.com/when-to-replace-a-heat-pump.htmlhttps://en.poradnikpomp.com/img/when-to-replace-a-heat-pump.pngWhen to replace a heat pump: age, efficiency drift, leaks and the payback arithmetic (2026)Notice the honest weakness of this arithmetic: the payback is usually longer than the comfort you are chasing.