In short. A 6 kW air-to-water heat pump costs from 103 876 lei in our catalogue, a 12 kW one from 123 068 lei. That is the equipment; installation, the tank and pipework are priced after a visit. Air-to-air means an air conditioner with heating: from 9 910 lei per room, installed. Heat from both costs about 2.5 times less than gas-boiler heat: with gas at 26.14 lei per m³, a house burning 1 500 m³ a season saves about 24 300 lei a year. An air-to-water pump pays back its equipment in 3.8–6.4 years, three air conditioners in a small house in about 3.8 years.
Two kinds of heat pump
Both take heat from outdoors and give 2–4 kWh of heat per 1 kWh of electricity. The difference is what they heat.
- Air-to-water heats the water in radiators, underfloor heating and the hot-water tank. It replaces the gas boiler completely, hot water included. It is a project: pump, tank, pipework, wiring.
- Air-to-air is an inverter air conditioner with heating. It heats the room it is in and cools in summer. Fitted in 3–5 hours, no renovation.
What an air-to-water pump costs
Heiko THERMAL equipment prices in our catalogue — monobloc with hydronic module, works down to −25 °C:
| Model | Output | Hot water | Equipment price |
|---|---|---|---|
| Heiko THERMAL 6 | 6 kW | separate tank | 103 876 lei |
| Heiko THERMAL 9 | 9 kW | separate tank | 113 516 lei |
| Heiko THERMAL 12 | 12 kW | separate tank | 123 068 lei |
| Heiko THERMAL PLUS 6 | 6 kW | built-in tank | 152 595 lei |
On top of the equipment come works that depend on the house:
- Installation and pipework: placing the monobloc, connecting it to the heating system, commissioning.
- A hot-water tank, if the pump has no built-in one. The PLUS version already has it.
- Wiring: a dedicated line and breaker sized for the pump.
- The heating system: if there is none, or it has old cast-iron radiators — underfloor heating or new radiators. The pump is most efficient with water at 35–45 °C.
Nobody can honestly quote a turnkey price without seeing the house: two houses of the same size can lose heat at twice the rate of each other. So we start with a visit and a calculation.
What air-to-air costs for a whole house
Example: a house with two bedrooms of 20–25 m² and a living room up to 35 m². We fit units that heat down to −30 °C:
- two bedrooms — TCL Elite Heat Pump 09, 9 910 lei each installed;
- living room — TCL Elite Heat Pump 12, 11 020 lei installed.
About 30 800 lei for three rooms in total (prices as of 20 October 2026). Materials — pipework, brackets, trunking — are priced at the free survey. All models that heat in frost are in Air conditioners with heating.
When it pays back
At ANRE tariffs: gas 26.14 lei per m³ from 1 October, electricity 3.56 lei per kWh. Over a season the pump gives on average 3 kWh of heat per 1 kWh of electricity — a cautious figure for our winter. Find in your bills how much gas the house burns in a heating season:
| Gas per season now | Gas, lei a year | Heat pump, lei a year | Saving a year | Air-to-water: equipment pays back in |
|---|---|---|---|---|
| 1 000 m³ | 26 100 | 9 900 | 16 200 | 6.4 years (6 kW) |
| 1 500 m³ | 39 200 | 14 900 | 24 300 | 4.7 years (9 kW) |
| 2 000 m³ | 52 300 | 19 900 | 32 400 | 3.8 years (12 kW) |
The pump's payback counts equipment only: installation and a tank add to it.
The air conditioners in the example above will not replace gas completely: they heat three rooms and make no hot water. Say that in a house burning about 1,000 m³ a season they take half of the heat — autumn, spring and mild days — and the boiler does the rest. Then the saving is about 8 100 lei a year, and 30 800 lei for three installed units pays back in roughly 3.8 years. A detailed heat-cost calculation is in How much heating with an air conditioner costs per month.
Where to start
- A flat, or a house with a working boiler: start with air conditioners. They cover October–November and March, and the boiler runs only in frost. The fastest payback.
- A house being built, or where the heating is being replaced: look at air-to-water with underfloor heating — easier to plan before finishing.
- You want to leave gas completely, hot water included: only air-to-water.
Choose an air conditioner for your room with the one-minute picker. For an air-to-water pump, call us: we start with a heat-loss calculation. Air conditioners are available in iute 0 % instalments.
Prices as of 20 October 2026, from the arcticaservice.md catalogue. Tariffs: gas 26.14 lei/m³ (ANRE, from 01.10.2026), electricity 3.56 lei/kWh (Premier Energy, ANRE regulated price from 02.04.2026; FEE Nord 3.95). Approximate calculation: 1 m³ of gas ≈ 9.3 kWh, boiler efficiency 90 %, seasonal heat-pump COP 3. Real figures depend on the house, insulation and model.
