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I am Res­id­ent

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I am Owner / Co-​Owner

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I am Prop­erty Man­ager

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I am Real Es­tate Com­pany

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Ser­vice In­form­a­tion

The picture shows a woman sitting on a couch and reading the ista heating bill. She has long blonde hair and is wearing black glasses. Her top is a blue shirt and she is wearing brown trousers. While she holds the heating bill in her left hand, her right hand rests on her chin. She looks directly into the camera. The beige couch on which she is sitting stretches across the entire lower third of the picture and has a white blanket draped over the back on the left with a yellow cushion leaning against it. In the background are various pieces of furniture that suggest a living room: A floor lamp and a shelf can be seen on the right, and in the centre an open two-part door leading into another room with bookshelves. The entire background is blurred.

Free We­binar: Heat cost al­loc­a­tion and b

20.10.2025 | 19:00 -> Lorem ipsum dolor sit amet, con­sect­etuer adip­is­cing elit. Aenean com­modo ligula eget dolor. Cum mag­nis dis montes, ri­diculus mus.

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View­ing con­sump­tion is now even easier w

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New ser­vice offer for all users of our s

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Sav­ing en­ergy can be so easy. We ex­plain

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The image shows a group of diverse people smiling and taking a group selfie. They are standing close together in an indoor setting that appears to be an office or a collaborative workspace. The people in the photo represent a variety of ages, genders, and ethnic backgrounds, reflecting a diverse and inclusive environment. The atmosphere is cheerful and positive, suggesting a sense of camaraderie and teamwork among the group members.
Be smart.

The best tips for sav­ing en­ergy eas­ily.

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En­ergy Sav­ing Tips

Down­loads

Latest broschures. doc­u­ments and price lists.

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Gloss­ary

Com­plex defin­i­tions ex­plained simply.

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FAQs

The most com­mon ques­tions for you.

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Laws and Reg­u­la­tions

The latest reg­u­la­tion that con­cerns you.

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We­binars & Sem­inars

Part­ner­ing with ista means work­ing with trus­ted ex­perts in en­ergy man­age­ment who will help you save costs and im­prove ef­fi­ciency. With ista, you'll have ac­cess to cutting-​edge tech­no­logy and in­nov­at­ive solu­tions that will future-​proof your en­ergy needs.

The picture shows a woman sitting on a couch and reading the ista heating bill. She has long blonde hair and is wearing black glasses. Her top is a blue shirt and she is wearing brown trousers. While she holds the heating bill in her left hand, her right hand rests on her chin. She looks directly into the camera. The beige couch on which she is sitting stretches across the entire lower third of the picture and has a white blanket draped over the back on the left with a yellow cushion leaning against it. In the background are various pieces of furniture that suggest a living room: A floor lamp and a shelf can be seen on the right, and in the centre an open two-part door leading into another room with bookshelves. The entire background is blurred.

We­binar: Heat cost al­loc­a­tion and billing easy made

20.10.2025 | 19:00

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We­binar: Heat­ing op­tim­isa­tion with Heat Pilot

22.10.2025 | 09:00

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The picture shows an intimate moment in a brightly lit room. In the foreground is a couple in a loving embrace in front of a large window. The man is wearing a brown top and beige trousers, while the woman is wearing a light-coloured top and dark trousers. Both people are standing barefoot on a wooden floor, with the man standing slightly behind the woman and embracing her tenderly. The window, which takes up most of the background, allows plenty of natural light into the room and offers a view of a wooded outdoor area. The sunlight streams through the window and creates warm rays of light in the room. To the left of the picture, near the window, is a table attached to a wall. There are two small objects on the table, presumably salt and pepper shakers. To the right of the window is a large houseplant in a white flower pot. The plant is clearly visible and lends the room a natural atmosphere. In the right-hand part of the picture, further in the background, there is a piece of wooden furniture that looks like a wine rack or a small shelf. There are a number of objects on the shelf, including a framed picture and other decorative items.

We­binar: Smoke alarm de­tect­ors save life and pro­tect prop­er­ties

30.10.2025 | 12:00

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The image depicts a man sitting at a round table in a well-lit office space. There is a glass of water and a small espresso cup on the table, adding to the professional yet comfortable atmosphere. The man is smiling and engaged with the water consumption billing from ista on his laptop, taking notes in a notebook. He is wearing a blue button-down shirt and glasses. The background features a flip chart, potted plants, modern furniture, and large windows allowing natural light to flood the room.

We­binar: Chilled water con­sump­tion billing and col­lec­tion

30.10.2025 | 15:00

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