Heat pumps
Air-to-water heat pumps sized from calculations for your building, with installation, subsidy help and servicing.
Warm rooms and fresh air at home. From sizing to the yearly service.
We size, install and service heat pumps, heat recovery ventilation and air conditioning. We calculate the heat demand of your building, help with the subsidy application and stay with you after the installation.
Rather talk it through? Call +48 000 000 000
- UDT-CERT F-gas company certificate
- Since 2008
About us
Bielak & Sowa is an installation company from Poznań, founded in 2008 by heating installer Tomasz Bielak and refrigeration technician Leszek Sowa.
Today 42 people work here, in 9 installation crews and a service department with 5 vans. We install air-to-water heat pumps, heat recovery ventilation, air conditioning, underfloor and radiator heating, and since 2025 HVAC systems for offices, shops and warehouses as well.
We work in Poznań, Poznań county and towns within about 80 km, from Gniezno and Września to Nowy Tomyśl and Kościan. Every installation starts with a heat demand calculation, because that decides the size of the unit and the size of your electricity bill. We help with subsidy applications under the Czyste Powietrze and Moje Ciepło programmes. And we stay around after the job is done: our service team makes about 3,400 visits a year across Wielkopolska.
Services
What we do
Six areas, one team. The people who do the calculations also install and later service the system, so they know what was done and why.
Heat recovery ventilation
Mechanical ventilation with heat recovery, with design, installation, airflow balancing and filter servicing.
Air conditioning
Wall-mounted split and multi-split systems for houses, flats and offices, with sizing, installation and servicing.
Heating systems and underfloor heating
Underfloor heating, radiators, boiler rooms and system balancing for heat pump operation.
Service and maintenance
Yearly servicing, repairs and service contracts for heat pumps, air conditioning and heat recovery ventilation.
Commercial HVAC
Air conditioning, heat recovery ventilation and hall heating for offices, shops, clinics and warehouses, with design and service contracts.
Bielak & Sowa in numbers
- 2008
- year the company was founded
- 1,900+
- heat pumps installed
- 1,100+
- heat recovery ventilation systems
- 3,400
- service visits a year
- 4.9/5
- average score from about 600 reviews
How we work
How we work with you
1. Free site visit
We come out and look at the building, the boiler room, the existing heating system and where the outdoor unit could go. We ask about your current fuel or electricity use.
2. Calculations and quote
We calculate the building's heat demand and size the unit to match. The quote lists equipment, materials and labour separately and usually arrives within 5-7 working days.
3. Subsidy help
We check which programme you qualify for and help you put together the paperwork for Czyste Powietrze or Moje Ciepło.
4. Installation and commissioning
A heat pump installation usually takes 2-4 days. At the end we set the heating curve, show you how to use the system and hand over the documentation.
5. Service
After the first month of heating we check the settings. After that we come back every year for the service visit the manufacturer requires to keep the warranty valid.
Client reviews
What our clients say
I was worried a heat pump wouldn't cope in a house built in 1986. Paweł worked out the heat loss room by room and we only replaced four radiators, not all of them. We had 21 degrees all winter, and I don't order coal any more.
The ground source heat pump and ventilation have run without problems for two seasons now, and in summer the underfloor heating cools the house a little. One star off for the drilling: the drilling firm turned up a week late and the garden looked like a building site for longer. At least the office warned us straight away.
The work went zone by zone, and we moved racking to a plan agreed a week ahead, so shipping carried on as normal. We got through our first winter without the gas radiant heaters. It's still cooler by the loading doors, but everyone on shift can feel the difference at floor level.
Case studies
Selected projects
Private specialist outpatient clinicClinic in Gniezno: heat recovery ventilation with cooling
- Noise in consulting rooms
- 31-34 dB(A) in spot checks, design target about 30-35 dB(A)
- Waiting room temperature in the July heat
- 24-25°C with 33°C outside
Distribution company, owner-occupied warehouseWarehouse in Września: heat pumps instead of gas radiant heaters
- Gas for space heating
- no longer used
- Heating energy cost, 2025/26 vs 2024/25 season
- about 35-40% lower (estimate, adjusted for degree days)
Family home, private clientA 1986 house in Luboń: from a coal boiler to a heat pump
- Electricity for heating and hot water, 2025/26 season
- about 5,900 kWh
- Flow temperature at design outdoor temperature
- 48°C (calculated), 45-47°C on the coldest January days
Blog
From the blog
Heat pump subsidies in 2026: Czyste Powietrze, Moje Ciepło and the tax relief
The three kinds of support for buying a heat pump in Poland in 2026: who each one is for, what amounts to expect and where applications most often go wrong.
6 min read
From coal to a heat pump: a 1978 house near Szamotuły after its first winter
A 1978 cube house, 140 m², an old coal boiler and a Czyste Powietrze grant. Our crew leader on how the switch went and how much electricity the heat pump used in its first winter.
6 min read
Annual heat pump and AC service: what happens during the visit
The checks a technician carries out during an annual heat pump or air conditioning service, and what manufacturer warranties and F-gas rules expect of you.
5 min read
Planning to replace your heating?
Start with a site visit. We will look at the building and tell you plainly whether a heat pump makes sense for you and roughly what it would cost.