Compare installers: contact details, locations and Tukes register entries in one place.
We list 9 companies in Lahti. Of those, 8 are in the Tukes register (checked 11 September 2026). The brands that come up most often are Mitsubishi Electric, Toshiba and Daikin.
Below is each company’s own page, with its contact details and the area it serves, and its offices on the map.
9 results
A Finnish pioneer in building technology services. ESP is a group focused on building technology contracting, maintenance, and upkeep. Services include turnkey contracting, HVAC & electrical contracting, maintenance services, energy management, and building automation. Operating widely in Southern and Central Finland.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Serves all of Finland
Hollolan Sähköautomatiikka Oy (HSA Oy) is a family-owned company specializing in backup power plants, generators, and related technology. Services include manufacturing, importing, maintenance, sales, and installation. Their product range covers aggregates, electric motors, solar energy systems, and customized backup power solutions.
In the Tukes register: operating right L. Checked 11.9.2026.
✅ Tukes-certified Lämpöjokeri Oy is a full-service heat pump provider with 20 years of experience in energy renovations. We offer air-to-water heat pumps, geothermal heat pumps, solar power systems, and electric car charging stations as a turnkey service for households, companies, and housing cooperatives.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
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.
Lämpökulma Oy is a heat pump specialty store that sells, installs, and services heat pumps on a turnkey basis in Lahti and Mikkeli. The company offers reliable building technology solutions and HVAC products, and handles work related to heating, domestic water, and ventilation.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Sähönen Oy is a Lahti-based electrical company specializing in solar power plants, electrical installations, EV charging solutions, and lighting. We serve households, companies, and housing associations throughout Finland with turnkey solutions. The company is a registered Reliable Partner (Luotettava Kumppani).
In the Tukes register: operating right A. Checked 11.9.2026.
Tukes-certified electrical company. Sipilän Sähkö Oy is an electrical contractor founded in 2014 and a member of the Elfin chain. Serving companies, housing associations, and households in the Päijät-Häme region. Our services include electrical installations, solar power systems, EV charging stations, and fault repairs.
In the Tukes register: operating right A. Checked 11.9.2026.
Tukes-certified electrical installation and refrigeration appliance company. Founded in 1994, this family business offers electrical contracting, maintenance, air source heat pumps, solar panels, and data networks in the Päijät-Häme region. Motto: "We do it as we would for ourselves".
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Established in 1985, Lemkem is a provider of energy and lighting solutions for properties. It offers comprehensive solutions in geothermal heat, solar energy, lighting, and heat recovery. The company specializes in its own design and installation, serving housing companies, commercial properties, municipalities, and cities.
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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 9 companies in Lahti, and 8 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.