The picture shows an older woman with a brown notebook in her hand, standing in a light-coloured office room with a glass front. She is wearing a creamy white jumper, several small gold necklaces and light brown suit trousers. she has grey shoulder-length hair and she is looking to the left and smiling. In front of her in the foreground is a table with a white model of a city with a tower block, several smaller houses and several wind turbines. the background is blurred, but you can make out the glass front, a white flower box and a corner of another desk.

Simple operations with connected energy management

One reliable system for metering, billing and energy data for building managers

ista provides simplifies building operations so you can cut manual work, reduce disputes and keep residents and owners informed with transparent information they trust.

Solutions that make daily management easier.

Running a building means juggling tenant queries, service providers, compliance and budgets. Our digital tools bring meter data, billing and insights together, so you spend less time chasing information and more time managing your properties. You get clear consumption data, cleaner bills and a single view of your portfolio - whether you manage one tower or a full community.

Digitalisation makes everything more easy.

When metering, billing and collections are connected on one platform, you spend less time on manual tasks and more time running your buildings. Our digital tools turn utility data into clear actions, smoother processes and better service for residents and owners.

A technician is working in a narrow technical room or basement corridor under a ceiling with several parallel metal pipes. He is wearing a blue safety helmet and a work jacket and is raising both arms to check or adjust a pipe or bracket above him. On the right, further installations such as ventilation ducts and cable ducts can be seen, while the walls are made of concrete or brickwork. The perspective looks along the pipes into the depths of the room and emphasises the technical infrastructure of the building.

Retrofit Solution

End‑to‑end retrofit delivery that upgrades your metering and cooling infrastructure, so your buildings are ready for compliant, consumption‑based billing and long‑term efficiency.

Close-up of several people at a shared workspace: hands typing on keyboards and operating computer mice on desktop PCs. One person is wearing a yellow knitted jumper and a bracelet; other arms can be seen blurred in the foreground. The scene conveys concentrated work in an office or training room.

Utility Billing

One unified, automated billing system for all utilities, giving you accurate invoices, simpler payments and less admin for both managers and end‑users.

A person sits in a modern office in front of large windows, holding a smartphone in their hand. An open laptop sits on the table. Outside, an illuminated cityscape can be seen at sunset. The scene conveys concentrated work in a quiet, professional environment.

Collection of Chilled Water Charges & Customer Service

Structured cash collection and dedicated customer support that keep chilled water payments on track, reduce arrears and give residents fast, consistent answers when they need help.

Improve efficiency for the long term.

Efficiency, transparency, and total control - digitalisation transforms traditional building services into a connected experience that works for you and your residents.

A service technician is working on a flat roof next to a row of large air conditioning or ventilation units. He is wearing a hard hat and a reflective safety vest and is kneeling in front of the units. He is holding a tablet or clipboard in his left hand, while his right hand is touching one of the units, as if he were checking its condition. The housings of the outdoor units are lined up in a row and feature round fan covers. In the background, roof structures and a sloped surface with solar panels can be seen, above which is a bright sky. The scene conveys the maintenance and inspection of technical building equipment.

Replacement of low EER ACs

Planned replacement of low‑EER AC units with high‑efficiency systems, cutting energy use and operating costs while maintaining comfort across residential and commercial buildings.

A service technician wearing an orange safety vest and protective helmet stands in an industrial plant between pipes and machine components. He is holding a tablet in his hand and checking a plant unit at head height, as if he were checking measurements or documenting a maintenance step. In the background, cables, metal beams and other technical installations run along a narrow corridor, and the lighting is reminiscent of a production or technical area. The scene conveys inspection, maintenance and digital documentation of plant operation on site.

Energy Audit

Independent, ASHRAE‑standard audits that reveal where energy is wasted, what to fix first and what savings you can realistically achieve.

The picture shows a light-flooded part of an office space. Two men can be seen sitting at a desk directly in the foreground, stretching from left to right in the lower third of the picture. The man sitting on the left has short, dark brown and curly hair, a brown-red beard, wears round glasses with black frames and a black shirt. The man to his right has almost black short hair, a brownish beard and is wearing a black T-shirt. Both men are looking at the two monitors on the desk in front of them. Both men are looking at the carbon audit provided by ista on these monitors. To the left of the monitors on the desk is a black printer. To the right of the monitors is a telephone and next to it, on the right-hand edge, two letter trays are stacked. In the background you can see a wall consisting of large windows that stretches from the first left third of the picture to the right edge. In addition, the ceiling, which can be seen in the upper part of the picture, also consists of the same large windows. On the right-hand side of the picture, a dark brown, approximately waist-high room divider can be seen, which bends to the right once. Six plants can be seen on the room divider and behind it. To the left of the picture, directly next to the man on the left, is a wall consisting entirely of green plants.

Carbon Audit & Reporting

Structured carbon audits and reporting that turn your consumption data into credible ESG metrics and compliance‑ready disclosures for owners, boards and regulators.

A person is working at a desk in an office, pensively holding a pen in their hand while looking at a large monitor. Several windows with text-based content and coloured areas are open on the screen, suggesting analysis or development work. In the foreground, another screen is blurred, next to it are a keyboard and a coffee cup. The environment is warmly lit and looks like a focused workplace in a home office or study. The scene conveys focused work, digital information processing and a calm, professional atmosphere.

From disconnected to centralised.

Remote connectivity to power smart metering.

Easy contact and 24/7 support.

We offer you a new and easy-to-use contact and support service.

Energy savings of 25% achieved ahead.

The client was facing increasing energy costs and an aging infrastructure of air conditioning and lighting systems.

150,000+ meters enabled real-time data.

Seamless MDMS integration of meters enabled real-time data access, faster billing, and greater satisfaction.

Talk to us about your buildings.

We combine personalised support with market‑leading digital portals, giving you 24/7 access to accurate energy and billing data for every property you manage on one secure platform.

Request consultation Visit the support area

One reliable system for metering, billing and energy data for building managers

Solutions that make daily management easier.