Head office and factory
Průmyslová 1428, 370 01 České Budějovice · Mon–Fri 8:00–17:00
How to reach us
Four ways to get started with us
Call, write or come to the showroom. There is always one named person who takes on your enquiry.
Krok01
Call our energy advisers
+420 800 555 234 · Mon–Fri 8:00–18:00. An adviser will hear you out, pin down the scope and pass your enquiry to an engineer in your region.
Krok02
Write to us through the online enquiry form
info@demo.cz. Attachments such as photos of the property, energy bills and a floor plan help us enormously with the design.
Krok03
Come to the showroom in České Budějovice
Průmyslová 1428. See the heat pumps, panels and batteries for yourself. The consultation is free — just call a day ahead to book.
Krok04
Ask us to call you back
Fill in a short form — name, phone, address of the property. We call back within 4 hours on working days.
48 hresponse time from receiving an enquiry
Practical information
Everything you need to know beforehand
Opening hours, addresses, the service line and regional contacts — all in one place.
Prague regional office
Vinohradská 2828/151, 130 00 Prague 3 · Mon–Fri 9:00–17:00
Brno regional office
Cejl 494/25, 602 00 Brno · Mon–Fri 8:30–17:00
Ostrava regional office
28. října 3117, 702 00 Ostrava · Mon–Fri 8:30–16:30
24-hour service line
+420 800 555 999 · for customers with a service contract only
Sales line
+420 800 555 234 · Mon–Fri 8:00–18:00, Sat 9:00–12:00
Enquiries email
info@demo.cz · we reply within 4 hours on working days
Service email
service@demo.cz · for claims and service calls
Grants email
grants@demo.cz · direct line to the grants team
Company and VAT number
IČ 26749823 · DIČ CZ26749823 · file no. C 12 345, Regional Court in České Budějovice