A reversible air-to-air system is a heat pump: in summer it moves heat out of your home, in winter it moves heat in. For apartments and well-insulated houses in Luxembourg it is often the simplest way to add efficient heating without touching the existing water-based system.
Even in cold weather, outdoor air contains usable energy. The unit extracts it and releases it indoors, delivering several units of heat per unit of electricity consumed. Efficiency falls as it gets colder, which is why sizing for the coldest weeks — not the average — is what makes the difference between comfort and disappointment. For rooms used daily, this is usually the cheapest heat available once installed.
• Apartments where a boiler replacement is impractical • Rooms added or converted after the original heating was designed • Well-insulated houses that need a heating top-up plus summer cooling • Home offices and top-floor rooms that are cold in winter and hot in summer In a poorly insulated building, insulation comes first. We will say so rather than sell equipment that has to fight the walls.
Air-to-air delivers heat directly into rooms and doubles as cooling. Air-to-water feeds radiators or underfloor heating and can produce domestic hot water, but is a much larger project. We install and service air-to-air systems. If your situation genuinely calls for air-to-water, we say so instead of pretending one solution fits everything.
Luxembourg subsidy schemes exist for heat-pump installations, with eligibility conditions on equipment performance and installer qualification — see our AC subsidies page for how this works in practice. Servicing is the same discipline as air conditioning: clean filters and coils, verified refrigerant circuit, checked condensate route, documented intervention.
Real Google reviews from verified clients — 32 five-star ratings.
"Great service, in two days he installed an air conditioning system with 3 split units and did everything very professionally."
Khan 804
Google Review · Air Conditioning
"Excellent service! Repairs completed in less than 2 hours, and a new AC unit installed in less than 24 hours. Highly recommend!"
Claudio L.
Google Review · Air Conditioning
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Phil H.
Google Review · Electrical
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Monique B.
Google Review · Electrical
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Google Review · Electrical
"Excellent experience with this company! Professional and friendly team, fast communication and everything was implemented exactly as agreed. The quality of service is very high. I would especially like to highlight their customer-focused approach."
Danira
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