Simplify cost allocation

ista aperto: The open solution for transparent allocation.

Managing heating costs can be complex and time-consuming. ista aperto is the modular solution that simplifies it all, ensuring accurate measurement, transparent billing, and full legal compliance. Our flexible system gives administrators and owners the freedom to choose how costs are managed across their portfolios.

One solution, many advantages.

Freedom of choice in service management

Remote reading with immediate access to data

Full compliance with regulations

Because fair cost allocation shouldn’t be complicated.

ista Aperto is the innovative system that brings transparency and independence to managing expenses. Designed for condominiums, cooperatives, and multi-building properties, it lets administrators and owners manage readings and billing freely – or even assign them to another provider without changing devices.

The system combines high-quality electronic heat cost allocators, heat meters, and water meters to ensure accurate, transparent measurement. Data is stored safely, transmitted automatically, and always available when needed.

In Italy, individual heat metering is not only best practice but a legal obligation under D.Lgs. 102/2014 and D.Lgs. 73/2020. With ista aperto, you stay fully compliant while making cost allocation simple, efficient, and fair for everyone.

A modular system that benefits everyone.

Condominium administrators

Simplify one of your most time-consuming tasks. ista aperto automates readings and cost allocation, ensuring transparency, reducing disputes, and guaranteeing compliance with Italian regulations.

Landlords & property owners

ista Aperto gives you precise data, fair billing, and the freedom to choose your preferred service provider, all while meeting legal obligations.

Residents

Enjoy peace of mind knowing you pay only for what you actually use. ista aperto provides clear, traceable consumption data for transparent and fair billing.

Fair, flexible, and fully compliant. Upgrade to ista aperto now.

How ista aperto works.

Italian law requires individual heat cost allocation to promote energy efficiency and fairness among residents. And ista aperto makes this compliance effortless.

It is an open electronic system based on certified heat cost allocators which measure radiator surface area and room temperature in order to calculate actual consumption.

Its flexibility is what makes it unique: administrators and property owners can choose to manage readings and billing independently or assign these services to any trusted partner without replacing the devices.

With ista Aperto, you stay in control, ensuring accuracy, transparency and freedom in cost management.

From installation to insight: One easy solution.

Ista aperto combines advanced metering technology with everyday simplicity. Each electronic heat cost allocator measures both the temperature of the radiator surface and the room temperature. The difference between the two readings reveals the precise heat output of each unit. The devices communicate via a secure Radionet code and can store up to 14 months of data, ensuring full traceability and transparency.

Installation is quick and flexible, and ista provides all the necessary materials — including allocators, meters, mounting accessories, and a tablet — for guided self-installation. The ista tablet provides maximum autonomy throughout the process, from device mapping to final verification. Readings can be taken remotely or in walk-by mode using the MGW portable antenna and the ista aperto app, giving administrators or service partners full control over how data is collected.

The devices comply with the UNI EN 442 and UNI 10200 standards, which guarantees their accuracy and compatibility with buildings across Italy.

Watch the video tutorial to see how easily ista aperto devices can be installed, configured and connected, step by step, with full autonomy and support from ista’s digital tools.

Technical features that make the difference.

  • Battery life: Up to 12 years of continuous operation
  • Data storage: Up to 14 months of consumption history
  • Reading options: Remote or walk-by reading via MGW antenna and ista aperto App
  • Installation: Quick, low-impact setup with self-installation kit and guided tablet interface
  • Communication: Encrypted Radionet code for secure data transfer
  • Standards compliance: UNI EN 442, UNI 10200, EU MID certified
  • Device replacement: Recommended every 10 years for guaranteed accuracy
  • Data traceability: All readings logged, stored, and exportable for audit-proof reporting

Why choose ista?

ista has decades of metering expertise and is synonymous with precision, transparency and trust.

ista aperto combines state-of-the-art technology with the flexibility that Italian administrators and property owners require. All devices have a battery life of up to 12 years and feature secure Radionet communication and automatic data transmission for complete traceability.
Our systems are certified according to UNI EN 442, UNI 10200 and EU MID standards, ensuring accurate measurement and full regulatory compliance.

ista aperto gives you the freedom to choose who manages installation, reading and billing, but you can also opt for our complete service package, which covers everything from setup to ongoing management. ista experts are also always available to provide technical guidance and support.

100% easy

Find your solution with us.

100% digital

Stay informed, everywhere and at all times.

100% sustainable

We give buildings a future.

The picture shows a young man sitting at a white desk in his home, smiling and looking at his mobile phone and using the power metering service from ista. He is wearing a rust-brown corduroy shirt, a sand-brown shirt underneath and has black square glasses on. His hair is short and black and he has a short black beard. In front of him on the table is a laptop, next to it is a calculator, a ballpoint pen with a white sheet of paper and a white coffee cup. On the right side of the picture, directly next to the man, is a large monstera. The background is blurred, but a grey couch with brightly coloured cushions can be seen in the top left-hand corner and to the right of it is a orange and black wooden kitchen counter with two black bar stools.

Take control of your readings.

Read when and how you want. Carry out your own readings quickly and securely: ista provides all the necessary devices and support materials, while you remain in full control of data collection and timing.

Alternatively, perform readings independently using the ista tablet, the MGW portable antenna and the ista aperto app. Data is transmitted instantly via radio, giving you complete independence with no technical complexity.

The picture shows a woman sitting peacefully on her couch and looking at her phone while smiling. background of the picture ist slightly blurred but you can still distinguish is a white modern kitchen with a white stone wall. On the stone wall are two simple shelves with food containers and to the right of them on the wall is an extractor bonnet. On the right-hand side of the picture, three wall cabinets can be seen, two of which have glass fronts. Underneath you can see a counter with two white chairs. On the counter is a vase with decorative flowers. In the foreground you can see the upper part of a light grey couch on which an elderly lady is sitting. She has a grey bob, black glasses and is wearing a blue shirt and light blue jeans. The lady is smiling at her mobile phone she is holding in her hand, with which she can easily and conveniently use ista's SmartPay option.

All the data in the palm of your hand.

With the ista Aperto app, you can read, record, and manage consumption data across one or several buildings. Fast, intuitive, and precise, it makes energy management easier than ever.

Switch to ista open and simplify your energy management.

Facts & figures

6,300 employees

Icon: In einem Kreis in der Farbe lime Grün befindet sich eine abstrakte Darstellung der Erde.

20 countries

3.7 mil. t CO₂ emissions avoided

Obrázok zobrazuje zelenú ikonku na vysielanie - prenos dát.

43 mil. radio devices

14 mil. utilisation units

Everything you need to download.

Brochure ista Aperto

PDF - 938 KB

Frequently asked questions

Discover more innovative solutions to transform your property.

Our custom solutions are designed to help our clients reduce their environmental impact, improve health and safety in their buildings, and save energy costs.

Heating optimisation

Optimise heating systems for enhanced efficiency and savings.

The picture shows a young pug standing comfortably and drinking water directly from a silver tap. In the background, the light brown kitchen counter on which the dog is standing and a few objects lying on this plate can be recognised in a blur.

Water billing

Save time and money with remote metering and transparent water billing solutions.