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Аbout us
Inter Systems Ltd. is an independent engineering company.
Our main focus is to satisfy and exceed our customer's expectations and through our reliable support to become their preferred partner. -
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1995
Established in
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20+
Years of experience
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1290+
Life safety & security installations
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Services
We may offer you design, installation and maintenance of:
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Smart Home Systems & BMS systems
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Fire alarm systems
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Voice alarm systems
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Fire extinguishing systems
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Security systems

State Reserve and Wartime Stocks State Agency
Petrol station in SlivenState Reserve and Wartime Stocks State Agency
0.6 km2/300 thousand tons of liquid fuels
Fire alarm system:
- Explosion-proof flame detector, ATEX – 84 pcs.
Danger management system

Gentle House 19
Boyana area, SofiaGentle House 19
Area: 900 m2
Smart Home system, KNX
Electrical installations:
- Power installation
- Structured wiring system
- Cable TV
- Signal security system
- Intercom system
- Keyless in
- KNX
Visualization – GIRA HomeServer
Integrated systems:
- Signal security system – Honeywell
- Video intercom system – GIRA
- Video surveillance system– HIKVISION
- Keyless in - Ekey
- VRV Daikin (1 external and 9 indoor units)
- Cascade condense gas boiler and De Dietrich thermal pump
Irrigation system
Lighting control:
A total of 378 lighting fixtures and 200 m LED strips
- Switching, Dimming, RGB, DALI, DMX
- Façade and stairway lighting
HVAC:
- Individual temperature control - 14 rooms
- Underfloor heating, VRV
(Main and additional heating and cooling, reduction when opening a window)
Blinds, curtains, tents, doors and windows:
A total of 110 interior and exterior blinds
Automatic dimming function depending on the azimuth, elevation, outdoor, indoor temperature and shading from surrounding buildings/vegetation
Air function – automating blind lifting when opening a door or a window
Security functions – closing when activating a security system
Automatic protection against wind, rain, frost
Integration of security and fire alarm system:
- Complex integration of the security system through KNX interface
- Realization of complex scenarios and logic
- Direct connection of fire alarm detectors through KNX
Integration of video surveillance system:
- Visualization on a common Touch panel
- Realization of complex logic and scenarios for the events, including motion in front of the camera, line crossing, etc.
Integration of intercom system:
- Complex integration of the intercom system. Visualization on a common Touch panel.
Keyless in:
- Complex integration of biometric/RFID access control system
- Allow/disable access, event archive
- Realization of complex scenarios and logic
Smart metering:
- Electricity
Visualization and control:
- Touch панел 19“ - PEAKNX
- WEB interfaces
- Аpple App
- Android app
- Push notifications

Lukoil Neftohim Burgas EAD
Rosenets Port TerminalLukoil Neftohim Burgas EAD
Fire alarm system:
- Explosion-proof lame detector, ATEX – 68 pcs.
Video surveillance :
- Explosion-proof PTZ camera, ATEX – 8 pcs.
- Explosion-proof PTZ combined with thermal camera, ATEX – 4 pcs.
Fire-fighting pumps for sea water:
- 450 м3/h, 13 bar, 365 kW, V8 diesel engine, FM certificate – 3 pcs.
- 270 м3/h, 13 bar, 236 kW, diesel engine, FM certificate – 3 pcs.
Danger management system
Foam concentrate for fire-fighting purposes – 110 t. Delivery in very short period of time.

DS SMITH Bulgaria AD
4400 PazardjikDS SMITH Bulgaria AD
Fire sprinkler system:
- Sprinkler – 4056 pcs.
- Control signal valves – 30 pcs.
- Seismic pipeline fastening
Fire-fighting pumping station:
- 16000 l/min
Compressor station:
- 3,5 m3/min
External pipeline for fire-fighting purposes
Fire alarm systems
Danger management system
Design, equipment and installation approved by FM Global. Executed by extremely short deadlines in interrupted operation settings.
Standards
Our systems meet the highest industry standards.
We design and install according to: