Compare installers: contact details, locations and Tukes register entries in one place.
We list 15 companies in Lahti. Of those, 10 are in the Tukes register (checked 11 September 2026). The brands that come up most often are Daikin, Mitsubishi Electric and Toshiba.
Below is each company’s own page, with its contact details and the area it serves, and its offices on the map.
15 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
Geokaivot Oy offers geothermal heating and cooling solutions utilizing natural energy for properties. The company provides geothermal heat, ground cooling, and turnkey solutions throughout Finland. Their services include drilling, collection pipe installation, and earthworks using modern equipment, ensuring a reliable and environmentally friendly result.
Suomen Vesitekniikka Oy specialized in HVAC services for detached houses, apartment buildings, and commercial properties. Their expertise included pipe renovations, sewer renovations, heating systems, and ventilation maintenance. The company was declared bankrupt in 2024.
The company states it is in the Tukes register. We have not confirmed this against the register.
✅ Tukes-certified Combi Mont (Ab Åker-Lind Oy) sells, installs, and services high-quality air heat pumps, air-to-water heat pumps, and ground source heat pumps. We represent Daikin heat pumps. We serve the area of Helsinki, Porvoo, Lahti, Liljendal, Loviisa, and Kotka. Reliable service with professional expertise.
The company states it is in the Tukes register. We have not confirmed this against the register.
✅ 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.
Lämpösäätö Oy is a company specializing in the installation, maintenance, and repair of heating systems with over 50 years of experience. Services include air-to-water heat pumps, geothermal, district heating, oil, and gas heating systems, as well as HVAC work for individuals, companies, and municipalities in the Lahti region.
In the Tukes register: operating right A kaasu. Checked 11.9.2026.
Lämmöx Oy is a company specializing in the installation and renovation of heat pumps and hydronic heating systems. Services include the sale, installation, and maintenance of air source, ground source, and air-to-water heat pumps for new and renovation projects. Additionally, the company performs HVAC work for properties, from tap replacements to plumbing renovations.
In the Tukes register: operating right e3, valid until 12.3.2029. 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
✅ Tukes-certified cooling equipment service company that installs, repairs, and maintains all imported cooling equipment, cold rooms, heat pumps, and professional kitchen appliances in Finland. The service network covers the whole of Finland, offering solutions for both businesses and households.
In the Tukes register: operating right A. Checked 11.9.2026.
Lahden Lämpöpumput Oy is a company specializing in heat pump solutions. It offers and installs suitable heating and cooling solutions, with main products including ground source, air-to-water, and air-source heat pumps in the Lahti region.
In the Tukes register: operating right e3, valid until 12.3.2029. 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 HVAC company in the Lahti and Hollola area, specializing in heat pump installations and comprehensive HVAC contracting for single-family, semi-detached, and terraced houses. Offers installation, maintenance, and repair services for heating, water, and ventilation systems. Also operates as an authorized Uponor KOTI contractor.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
Serves all of Finland
✅ Tukes-certified company specializing in energy-efficient heating and cooling solutions. LämpöYkkönen supplies and installs heat pumps and solar panels for homes and larger properties throughout Finland, making the transition to renewable energy easy on a turnkey basis.
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.
Serves all of Finland
Suomen Porakaivo (Cleacap Oy) is a professional well drilling company established in 1993. The company provides water wells and geothermal wells as turnkey solutions. Their services also include pump installations, maintenance, well washing, and pressure opening. They operate specialized equipment suitable for demanding terrains.
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Published prices across Finland run €13,000–€33,225. The spread is method, not noise: the sources are costing different jobs. €13,000–€20,000 turnkey — the site’s own typical range (urakkamaailma.fi, 14 August 2026). €23,000–€26,000 replacing oil heating, demolition included — 2 costed worked examples (Motiva, 2024). €27,075–€33,225 jobs actually paid for — median of 2 verified jobs (urakkadiili.fi, 13 May 2025). Usually quoted separately: the municipal permit fee, demolishing the old heating system, work on the electrical panel, a buffer cylinder, reinstating the garden after trenching and rebuilding the heat distribution network.
Sources:urakkamaailma.fi, 14 August 2026; Motiva, 2024; urakkadiili.fi, 13 May 2025
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
The grant is closed. Applications ended on 25 May 2026 at 16.15, the appropriation was spent in full and over 300 applicants received nothing. It used to pay €4,000 / €2,500 depending on the replacement system (Elinvoimakeskus, 1 September 2026). Giving up oil heating altogether carries an elevated credit of 60% of the labour share, up to €3,500 per person, in force until 31 December 2027 (Verohallinto, 10 February 2026).
Sources:Elinvoimakeskus, 1 September 2026; Verohallinto, 10 February 2026
It is set by the distribution temperature, not by the brand: 3.4 on 30 °C underfloor heating, 2.5 on a 60 °C radiator circuit, and 2.3 for domestic hot water (Ympäristöministeriö, 20 December 2017). That is the running cost difference the emitters make before any brand comparison. The pump is sized to part of the peak load, so 1–5% of the annual energy still comes from a back-up resistor at a coefficient of one (Motiva, 16 February 2026).
Sources:Ympäristöministeriö, 20 December 2017; Motiva, 16 February 2026
We list 15 companies in Lahti, and 10 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.