Air-to-water heat pumps in Varna – sales, installation and service

Air-to-Water Heat Pumps in Varna – Sales, Installation and ServiceThe most economical way to heat with electricity: 4 to 5 kWh of heat from 1 kWh of power
This section brings together 81 air-to-water heat pumps from Atlantic (33 models), Daikin (17), KAISAI (13), Gree (9) and AUX (6). For residential buildings there are 77 models with a heating capacity of 4,3–30 kW and prices from 3 196 € to 17 340 €. The remaining 4 are industrial monobloc units 65–140 kW for commercial premises and warehouses (22 957–40 852 €). All of them run on R-32 refrigerant and heat at outdoor temperatures down to −25 °C, with some models going as low as −28 °C. The standard warranty is 36 months.Why a Heat Pump Is the Most Economical Electric Heating
Every direct electric appliance — a convector, an oil-filled radiator, an electric stove, a water heater — turns 1 kWh of electricity into exactly 1 kWh of heat. Its conversion coefficient is 1,0 and physically cannot be any higher. That is why an “economical electric heater” simply does not exist: they all use the same amount of power.
A heat pump does not generate heat — it moves it: it takes heat from the outdoor air and transfers it to the water in your heating system. That is why 1 kWh of electricity gives you 4 to 5 kWh of heat. The most efficient model in this section has SCOP 5,22, meaning that over one heating season it returns 5,22 kWh of heat for every kilowatt-hour you pay for. In practice, your heating bill is 4–5 times lower than with a convector at the same comfort level. A detailed explanation of the cycle, the system layout and the temperature classes is available in how an air-to-water heat pump works.
A full comparison with real numbers by floor area and tariff is in the article
Cheap Electric Heating.Monobloc or Split Heat Pump
Monobloc (14 models here) — the entire refrigerant circuit is sealed inside the outdoor unit, and only two water pipes enter the building. Installation is faster and cheaper, there are no on-site refrigerant connections, and the risk of a refrigerant leak is kept to a minimum. However, the water circuit needs freeze protection.
Split — an outdoor and an indoor unit connected by refrigerant piping. The water stays entirely inside the building, which is an advantage in harsher winters, but installation must be carried out by a technician licensed to handle fluorinated gases.
For a home in Varna and along the Black Sea coast, both options work without any issues. The difference becomes significant if the property is left empty for long periods in winter or has no guaranteed uninterrupted power supply.How to Choose the Capacity in kWAs a rough guide, you need between 50 and 100 W per square meter, depending on insulation:100 m², good insulation, built after 2010 → 6–8 kW150 m², partial insulation → 10–12 kW200 m², old unrenovated building → 16–20 kWcommercial premises or several floors → 25–30 kW
Oversizing is not an advantage. A heat pump that is too large runs in short on–off cycles, which lowers the real SCOP, wears out the compressor and makes the unit more expensive for no benefit. Accurate sizing is done after a site survey, not based on floor area on paper.What SCOP and the Energy Class Really Mean
COP is the coefficient at one specific test point. SCOP is the seasonal coefficient — averaged over the whole heating period with real changes in outdoor temperature. When choosing, look at SCOP: it is the number you will see on your bill.
The energy class of heat pumps is stated separately for heating and for cooling. The second letter is the heating one, and that is exactly what most buyers overlook. A model rated A+++ for cooling and A+ for heating is a poor choice for a house that will rely on it all winter.Low-, Medium- and High-Temperature Models
Low-temperature models supply water at around 35–45 °C and are designed for underfloor heating or fan coil units. They deliver the highest seasonal coefficient.
Medium- and high-temperature models reach 60–80 °C and work with existing radiatorswithout having to rebuild the whole system — which makes them the main choice when replacing an old gas or oil boiler. The trade-off is a 10–15% lower SCOP.
If the building already has radiators and you are not planning a major renovation, look for a medium- or high-temperature model. If you are building new or installing underfloor heating, go with a low-temperature one.Heat Pump with DHW and Built-In Hot Water Tank
49 of the models in this section also produce domestic hot water in addition to heating and cooling, and 17 come with a built-in 190-liter tank. This is a three-in-one solution: it heats in winter, cools in summer and makes hot water all year round — with the same 4–5 coefficient instead of the 1,0 of a regular electric water heater.Operation at Low Temperatures
All models here support heating down to −25 °C outdoor temperature, and some series down to −28 °C. For the climate of Varna, the Black Sea coast and most of the country, that is more than enough margin: the operating point almost never gets close to the limit, and efficiency stays high throughout the season.Installation, Site Survey and Warranty
A heat pump is not something you buy off the shelf. The capacity, type (monobloc or split), temperature mode and connection to the existing system are determined after a survey of the specific property. We offer a free site survey and consultation, delivery, installation and commissioning, as well as ongoing maintenance. The equipment warranty is 36 months.
If you are still torn between a heat pump and a regular air conditioner for heating, start with
air conditioner for heating,
compare the best air conditioners for heating
and see how much electricity an air conditioner uses.