Compare installers: contact details, locations and Tukes register entries in one place.
We list 15 companies in Oulu. Of those, 13 are in the Tukes register (checked 11 September 2026). The brands that come up most often are Mitsubishi Electric, Toshiba and Gree.
Below is each company’s own page, with its contact details and the area it serves, and its offices on the map.
15 results
Hammarin Sähkö Oy is Finland's oldest electrical company (est. 1909), based in Oulu. As a full-service electrical house, they offer comprehensive electrical installations, design, and contracting (S1 class). Their shop and online store provide lighting, electrical supplies, appliance spare parts, and maintenance services.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Suomen Latausasennus Oy implements electric vehicle charging stations safely from planning to installation. Services include site surveys, electrical system expansions, installation of charging stations, as well as maintenance and fault repair. Customers include households, housing companies, businesses, and the public sector in the Oulu region.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Tukes-certified cooling appliance business specializing in energy-efficient heating solutions in the Oulu region. The product range includes air source heat pumps, air-to-water heat pumps, water heaters, and solar panels. The company offers comprehensive services from planning to installation and maintenance, selling well-known brands such as Mitsubishi Electric, Toshiba, and Panasonic.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
✅ Tukes-certified Oulu-based refrigeration specialist focused on property cooling, heat pump, and refrigeration systems. The company sells, installs, and services leading brands in the industry. Services also include comprehensive maintenance, and they hold an electrical contracting license (S3).
The company states it is in the Tukes register. We have not confirmed this against the register.
Loistox Oy is a company specializing in solar power and the energy sector, which designs, sells, and installs solar power systems, air-to-water heat pumps, and air-source heat pumps on a turnkey basis. The company serves the entire Finnish territory, providing solutions for private homes, businesses, and farms.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Lämpöfix is an HVAC installation company from Oulu, specializing in the renovation of domestic water and heating systems, renewable energy systems, geothermal heating, and underfloor heating. The company carries out all HVAC work as a complete contract for both new and renovation projects in Oulu and the surrounding municipalities.
In the Tukes register: operating right A öljy. Checked 11.9.2026.
✅ Tukes-certified Oulun Ekolämpö Oy is a company specializing in heating and cooling solutions. It is an official reseller and warranty service provider for Scanoffice and Toshiba. The company sells, installs, and services air source heat pumps in the Oulu region and Northern Finland. Services also include electrical installations and contracting.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Solarum Suomi Oy is a Tukes-certified service company specializing in solar energy and heat pumps. They sell, design, and install solar panel systems, air-to-water heat pumps, and battery storage solutions on a turnkey basis. Their services cover private homes, housing companies, and businesses throughout Finland.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Solarvoima Oy is a specialist company founded in 2014, focusing on solar power systems and property batteries. They provide high-quality turnkey installations for detached houses, housing companies, and commercial properties throughout Finland. The company employs its own experienced installers and prioritizes high-quality workmanship and customer satisfaction.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Pohjoisen Sähkö ja Kiinteistö Oy (A-Maailma) is a Tukes-certified electrical contractor based in Oulu, Finland. Specializing in solar power systems and energy storage solutions, the company offers nationwide installation services for residential, commercial, and housing association clients. Their expertise also covers general electrical installations and design.
In the Tukes register: operating right A. Checked 11.9.2026.
Teknicool Oy is a Tukes-certified cooling appliance contractor specializing in air source heat pumps in the Oulu region. Their services include the sales, professional installation, and maintenance of heat pumps, as well as small electrical works for households. Key brands include Mitsubishi, Toshiba, and Panasonic. They also offer refrigerated trailer rentals.
In the Tukes register: operating right y3. Checked 11.9.2026.
✅ Tukes-certified Wirmax is a modern building technology group offering comprehensive HVAC, electrical, automation, and security solutions. We serve households, companies, and housing associations with maintenance, installation, and contracting needs. The group employs over 100 professionals and operates in Uusimaa, Central Finland, and Northern Finland.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Tukes-certified SLK-Asennus Oy is a company operating in the Oulu and Siikalatva region. We provide electrical, air heat pump, and refrigeration installations with solid professional skill. We hold S2 electrical and over 3kg refrigeration permits. Our services also include water coolers and rental of camper vans and flatbed trailers.
In the Tukes register: operating right A. Checked 11.9.2026.
An electrical company operating in the Oulu region, offering comprehensive electrical installation, renovation, and contracting services to both private and corporate customers. Services also include the installation of air source heat pumps, solar panels, and charging stations for electric cars. The company serves everything from small installations to large projects with over 20 years of experience.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Kotisol Oy is a company specializing in the installation of solar power systems, serving private houses, companies, and farms throughout Finland. It offers comprehensive "turnkey" installation services through its partners and has completed over 5,000 energy renovations. The company's electricians have the appropriate contracting rights.
The company states it is in the Tukes register. We have not confirmed this against the register.
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Household tax credit: 35% of the labour share of a company invoice, up to €1,600 per person per year, with a €150 own share (Verohallinto, 10 February 2026). The government has proposed raising this to 40% and €2,100 for 2026–2027, retroactively from 1 January 2026 (HE 113/2026 vp, Eduskunta, 11 June 2026). Parliament has not passed the bill, and the tax administration still writes about it in the conditional (Verohallinto, 16 June 2026).
Sources:Verohallinto, 10 February 2026; Eduskunta, 11 June 2026; Verohallinto, 16 June 2026
We list 15 companies in Oulu, and 13 of them are in the Tukes register (checked 11 September 2026). The map above shows which of them work nearest to you; open a company’s own page for its contact details and service area.