Dalsia Client Portal

Our online center — accessible 24/7 from any device.

With Dalsia's Client Portal, everything is under your control – you can check bills, submit requests, and monitor your remote reports with just a few clicks. Manage your services conveniently, anywhere, anytime.

to the Client Portal

Laptop showing the Dalsia customer portal

+359 2 408 5000 - contact phone number

Our call center is available every weekday from 8:30 AM to 4:30 PM.

We will call you back if the lines are busy.

Smiling call center operator wearing a headset

Remote water meters from Dalsia

By the end of 2026, all hot water meters must be equipped with remote reading.

Our remote water meters provide accuracy, reliability, and peace of mind – with professional installation and integration with the Client Portal.

Order a replacement through the Customer Portal

Two OpTherma water meters against a bathroom background

Since our establishment, we have achieved

616 369

Serviced devices

20 175

Produced district heating/cooling stations

1 409 675 tons

Saved CO₂ emissions

PRODUCTS

Remote devices for your home and business

NEW

Two OpTherma HYDRODIGIT water meters with digital displays

Water meters OpTherma HYDRODIGIT-S1

Single-jet digital water meter with an 8-digit display integrated with wireless transmission modules wM-Bus / LoRa.

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Kamstrup MULTICAL 303 heat meter with an LCD display

Apartment heat meter Kamstrup Multical ® 303

Ultrasonic heat/cold meter

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Heat cost allocator OpTherma-2

Heat cost allocator

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Services

Your reliable partner for comprehensive heating solutions

Connecting to the district heating network

Everything about district heating - from A to Z.

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District heating substations

High-performance reliable solutions for central heating.

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Components

A complete range of high-quality components for the construction and modernization of heating and cooling systems.

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SCADA management of district heating substations

Remote control and real-time consumption optimization.

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Heat cost allocation

Precise heat cost allocation and transparency of expenses.

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Selected projects

Dalsia around the world with sustainable solutions

Dalsia implements key central heating projects in Europe and the Middle East.

Our teams design, construct, and deploy comprehensive solutions – from heat distribution networks and construction works, to the production and installation of district heating substations, as well as SCADA management and precise submetering with remote devices.

Thanks to our own district heating substations workshops and accumulated international experience, we deliver reliable solutions that optimize energy use and promote sustainability.

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Substation for Denmark in the production hall with a control cabinet

Intelligent and sustainable central heating solutions for Denmark

Three business people talking on outdoor steps

Production and delivery of district heating substations for KELAG Energie & Wärme GmbH, Austria

Residential tower in Sofia connected to district heating

Innovative heating solutions for the Avigea building - Sofia

Useful information

News and Highlights from Dalsia

Team meeting around a table in a bright office

Trademark Dalsia

Dalsia OOD is the new trade name that replaced Brunata OOD. The change reflects the natural evolution of the company as a leader in heat metering and as a manufacturer of comprehensive, intelligent energy solutions for heating, cooling, and consumption management.

Dalsia infographic: average heating energy consumption down 8.9% and average seasonal bill down 3.9%

Dalsia Energy Report 2025/2026: How Data Helps Us Understand and Manage Heating Consumption

Average heating consumption decreased by 8.9%, while the weighted average seasonal heating bill fell by 3.9%, according to Dalsia’s analysis of 127,810 customers.

Colleagues joining hands as a sign of partnership

Elveco and Toplocontrol are now Dalsia

We bring together teams, expertise, and processes under the Dalsia brand to offer you a stronger portfolio and even better service.