Lexer Oy
Lohja
A heat pump contractor that offers heating and cooling solutions. Services include air source, air-to-water, and ground source heat pumps.
In the Tukes register: operating right L. Checked 11.9.2026.
Lohja · Geothermal heating
Geothermal heating in Lohja
Compare installers: contact details, locations and Tukes register entries in one place.
11installers
10in the Tukes register
Geothermal heating in Lohja
We list 11 companies in Lohja. Of those, 10 are in the Tukes register (checked 11 September 2026). The brands that come up most often are Nibe, Bosch and Gree.
Below is each company’s own page, with its contact details and the area it serves, and its offices on the map.
What it costs
All results
11 results
Locations on Map
9 locations
CTM Energia Oy
Lohja
Tukes-certified expert in ground source heat and boreholes. Over 20 years of experience in designing and installing heat pumps, boreholes, and underfloor heating. We offer Nibe heat pumps, maintenance, and renovation services in the Kirkkonummi area. Services also include energy calculations and borehole cleaning.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
K&T Pipe Oy
Lohja
Serves all of Finland
An HVAC company established in 2019 in Lohja, serving households, businesses, and housing companies in the Uusimaa region and, if necessary, throughout Finland. Services include HVAC installations, maintenance, pipe renovations, and domestic water and heating pipe renovations. Also offers construction services, such as bathroom and kitchen renovations.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
Ilma & Lämpö Luhtanen Oy
Lohja
Ilma & Lämpö Luhtanen Oy is an HVAC specialist operating in Lohja and the Uusimaa region. We specialize in the sales, installation, and maintenance of NIBE exhaust air and air-to-water heat pumps. Our range also includes Mitsubishi Electric and Gree air source heat pumps. Additionally, we provide ventilation cleaning, measurement, and adjustment services, as well as thermal imaging.
The company states it is in the Tukes register. We have not confirmed this against the register.
Lohjan LVI- ja Lämpöasennus
Lohja
Lohjan LVI- ja Lämpöasennus is an HVAC installation company that offers services in the Western Uusimaa region, including maintenance and installations. Their services include faucet and toilet installations, heating and plumbing work, as well as heating system maintenance and repairs. The company serves the areas of Lohja, Nummela, Vihti, and Karjalohja.
In the Tukes register: operating right C kaasu. Checked 11.9.2026.
LVI-Sampo Oy
Lohja
LVI-Sampo Oy is a family business specializing in plumbing renovations and heat pumps in the Lohja and Länsi-Uusimaa region. Services include HVAC installations, pipe renovations, and the sale, installation, and maintenance of air-to-air and air-to-water heat pumps. The company serves both households and businesses, focusing on energy-efficient and customer-oriented solutions.
In the Tukes register: operating right L. Checked 11.9.2026.
LVI-Huolto Marjamaa Oy
Lohja
A family-owned HVAC company founded in 2021, which offers comprehensive HVAC contracting, installation, and maintenance work. Services include e.g. heat pumps, drain openings, and plumbing. The company serves businesses, housing associations, and households in Vantaa, the capital region, and throughout the Uusimaa area.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
Ahmoon Vesi ja Lämpö Oy
Lohja
Ahmoon Vesi ja Lämpö Oy provides comprehensive HVAC services in Karkkila. We specialize in plumbing, heating systems, domestic water circulation solutions, and heat pumps. We serve residential, commercial, and industrial clients with turnkey project delivery. Our services also include fire extinguisher maintenance and solar power systems.
In the Tukes register: operating right A kaasu. Checked 11.9.2026.
Lohjan Kylmäasennus Oy
Lohja
✅ Tukes-certified Lohjan Kylmäasennus Oy offers the sale, installation, and maintenance of heat pumps and cooling equipment with professionalism in Lohja and the entire Southern Uusimaa region. Services also include refrigerated trailer rentals. The company serves both private and corporate customers with decades of experience.
In the Tukes register: operating right A. Checked 11.9.2026.
Suomen Sähkö- ja Kiinteistötekniikka Oy
Lohja
Suomen Sähkö- ja Kiinteistötekniikka Oy performs electrical and refrigeration installations, maintenance, and repairs comprehensively in the Uusimaa region. We also offer electrical services, air conditioning and heating, renewable energy solutions, as well as telecommunications and automation services.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Laroc Oy
Lohja
Founded in 2007, Laroc Oy is an HVAC company specializing in heating and cooling solutions. The company primarily implements heat pump systems on a turnkey basis in the Uusimaa region. Laroc has delivered and installed over 5,000 heat pumps and is now part of the Cervi Group.
In the Tukes register: operating right A. Checked 11.9.2026.
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FAQ
Frequently Asked Questions
How much should I budget for geothermal heating in Lohja?
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
Can I claim the household tax credit on the installation?
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
Is there still a grant for giving up oil heating?
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
What seasonal efficiency should I expect?
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
How many installers do you list in Lohja?
We list 11 companies in Lohja, 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.