Affordable and hassle-free heating with no upfront investment
Low costs, stable pricing, and cooling all in one package.

More affordable energy
Geothermal heating as a service is more cost-effective and stable than district heating.
No financing risk
Voltan handles the investment — as a housing cooperative, you pay only for the energy you use.
Carefree service
Voltan takes care of maintenance, remote monitoring, and optimization.
Benefits of the geothermal heating service model for housing cooperatives
Lower heating and maintenance costs
The housing cooperative does not need to invest in the geothermal system
No new financing costs for the cooperative
No worries about electricity price fluctuations
Voltan is responsible for the system’s performance and remote monitoring
No quality risk – Voltan has a natural incentive to implement the system as efficiently and reliably as possible
Option to buy the system

Voltan handles the entire implementation and operation of the geothermal system
Suitability and quote
We assess the property’s heating needs and analyze the financial benefits
Design
We design the property’s geothermal system precisely according to requirements
Construction & Investment
We finance the construction of the geothermal system
Commissioning and maintenance
Voltan handles remote monitoring, optimization, maintenance, and equipment replacement

As Oy Espoon Tammi – A sustainable energy solution through the collaboration of two industry professionals
Completed in 2022, As Oy Espoon Tammi is an example of how effective collaboration between two leading companies in their fields, Voltan Lähienergia and Tom Allen Senera, enables the implementation of sustainable and cost-effective energy solutions.
The Voltan team has collectively been involved in building over 2,000 large geothermal heating systems.
The Voltan team has collectively been involved in building over 2,000 large geothermal heating systems.
Benefits of Voltan’s service model compared to owning a geothermal system
| Step | ![]() | Own geothermal heat |
|---|---|---|
| Initial investment | No significant upfront investment | Significant upfront investment |
| Financing costs | No new financing fees or loan costs for the housing cooperative | Cooperative finances through a loan, tying up capital in the geothermal system |
| Energy price | Included in the service price | Dependent on electricity prices and system performance/design |
| Maintenance | Included in the service price | Maintenance is the responsibility of the cooperative |
| Equipment replacement | Included in the service price | Replacement is the cooperative’s responsibility (outside warranty) |
| Remote monitoring | Included in the service price | Requires a separate agreement, adding extra cost |
| Buyout option | Housing company has redemption option | Cooperative pays for the entire system upfront — without knowledge of actual operating costs and efficiency |
Contact us
Are you interested in learning about your property’s savings potential? Get in touch — we’re happy to discuss how our service model could suit your property.
