




Heka Interior — office chair with 3D mechanism
ErgoFlex
ErgoFlex is a swivel office chair with a 3D synchro mechanism. The seat and backrest tilt in sync, and the built-in 3D mechanism also lets them tilt in all directions (360°). The synchro tilt and the 3D movement can be locked, and the movement tension is steplessly adjustable to your weight.
The backrest has mesh on a plastic frame and a height-adjustable lumbar support; the mesh headrest adjusts in height and tilt. You set the seat depth with a sliding plate, and the armrests are 4D adjustable. We assemble and upholster the chair in Medvode, Slovenia, in the fabric of your choice.
Business inquiry
We arrange special terms for larger orders. Leave us your details and we will get back to you as soon as possible.
Perfect Pairing
7-day free trial at your workplace
Quotes for larger quantities and projects
3-year warranty
Assembled and upholstered in Medvode

ErgoFlex
ErgoFlex chair: technical data
Swivel office chair with a 3D synchro mechanism, a mesh backrest with lumbar support and a mesh headrest. We assemble and upholster the chair in Medvode, Slovenia. Dimensions in millimetres.
Version
with headrest
Dimensions
assembled chair dimensions on requestA version without a headrest is available on request.
Materials and construction
Colours and finishes
request a physical sample for exact shadesTechnical data ErgoFlex
Key Features
- 3D synchro mechanism: seat and backrest tilt in all directions (360°), lockable
- Movement tension, steplessly adjustable to the user's weight
- Lock and synchro tilt angle from 0° to 18° in four steps
- Seat depth adjustable via sliding plate
- Seat height adjustable by gas lift
- Mesh backrest with height-adjustable lumbar support
- Mesh headrest, adjustable in height and tilt
- Adjustable 4D armrests
- Base: polycarbonate or aluminium five-star base; castors with rubber tread
- Assembled and upholstered in Medvode, Slovenia
Dimensions & Technical Specifications
Backrest width: 475 mm
Headrest width: 300 mm
We send the dimensions of the assembled chair (height, width, depth, seat height) on request: sales@heka-interior.com or +386 1 361 90 28.
Materials & Fabrics
Seat: upholstered in Nordic fabric in five colours: black 132, grey 117, grey 115, brown 127 and blue 909.
Backrest: mesh stretched over a plastic frame, with lumbar support.
Headrest: mesh on a plastic frame.
Colour of the backrest and headrest frame: sand beige, petrol blue, olive green, brick red, black.
Base: five-star base, polycarbonate or aluminium.
Castors: with rubber tread.
For further information write to sales@heka-interior.com.
Mechanism & Adjustments
3D synchro mechanism — the seat and backrest tilt in sync, and the built-in 3D mechanism also lets them tilt in all directions (360°). The 3D movement can be locked at any time.
Mechanism adjustments:
- Seat height (gas lift)
- Seat depth (sliding plate)
- Movement tension to suit the user's weight, stepless
- Synchro tilt angle from 0° to 18° in four steps, lockable
- 3D movement 360° lock
Other adjustments:
- Lumbar support — height
- Headrest — height and tilt
- 4D armrests
Delivery, Installation & Returns
Production: we assemble and upholster the chair to order in Medvode, Slovenia.
Free 7-day trial in your workspace. If the chair does not suit you, we collect it free of charge.
14-day returns in accordance with the law.
For Businesses & Architects
Volume discounts: from 5 pieces.
Configuration: choice of Nordic fabric (black 132, grey 117, grey 115, brown 127, blue 909), frame colour (sand beige, petrol blue, olive green, brick red, black) and base (polycarbonate or aluminium five-star base); a version without a headrest on request.
Our clients include NLB, Triglav and Volvo.
CAD files: on request. Chair showroom: Medvode, Žlebe 1. Project contact: sales@heka-interior.com
B2B SERVICES
For Architects & Project Planners
We advise on the selection, prepare a quote and deliver the chairs for your project.
CAD / BIM Files
Technical files (DWG) for 3D models and floor plans are available on request.
Personal Consultation
Our team of technologists and project managers will arrange a meeting with you. Free consultation for 50+ workstations.
Visit Our Showroom
Chair showroom in Medvode, Žlebe 1. Visits by appointment.
Volume Discounts
For 5+ units. For 200+ workstations, special offers and custom branding.
Documentation Downloads
All the technical data you need for office planning or a purchase decision.
Navodila za nastavitev stola
Kako nastavite višino, globino, jakost gibanja in 3D mehanizem v petih korakih (PDF, 2 strani).
ErgoFlex technical data
Adjustments and materials are listed on this page. Dimensions of the assembled chair and further documentation are available on request.
CAD / DWG files
For architects: files for floor plans and 3D planning are available on request.
TRUSTED BY
Among our clients
We have furnished offices and shared spaces for companies including NLB, Triglav and Volvo.










































Years of Slovenian tradition
Slovenian and European partners
Years of warranty
Days of free trial
Frequently Asked Questions
How does the ErgoFlex 3D mechanism work?
The seat and backrest tilt in sync. You limit the synchro tilt angle from 0° to 18° in four steps or lock it in the upright position. When you release the 3D movement with the button under the seat, the seat and backrest tilt in all directions (360°) and follow the movements of your body; when it is locked, the chair works as a chair with a synchro mechanism. The movement tension is steplessly adjustable to your weight.
How does the 7-day free trial work?
We deliver the chair to your address (office or home). Test it for 7 days in your actual work environment. If it's not a perfect fit, we will collect it at no cost. If you're satisfied, you keep it and pay. No risk, no questions asked.
Can I customize ErgoFlex?
Yes. You choose the colour of the backrest and headrest frame from five options (sand beige, petrol blue, olive green, brick red, black) and a polycarbonate or aluminium five-star base. The seat is upholstered in Nordic fabric in five colours (black 132, grey 117, grey 115, brown 127, blue 909). A version without a headrest is available on request. For larger projects (5+ pieces) we prepare a quote with your logo. For further options write to sales@heka-interior.com.
What's the warranty on ErgoFlex?
The ErgoFlex chair comes with a 3-year warranty. We assemble and upholster it in Medvode, Slovenia, where we also advise you on servicing.
Do you offer discounts for larger quantities or projects?
Yes. Quantity discounts from 5 pieces. For larger projects we prepare a dedicated quote with the selected fabrics and versions. Send an enquiry or call +386 1 361 90 28.
How do I adjust ErgoFlex to my build?
Set the seat height with the gas lift, the seat depth with the sliding plate, the lumbar support and headrest in height, and the 4D armrests to the position of your arms. Adjust the movement tension to your weight. We send the dimensions of the assembled chair on request. If you are not sure the chair suits you, try it free for 7 days or call +386 1 361 90 28.
Didn't find your answer?
Write to us at sales@heka-interior.com — we respond within 24 hours. For urgent projects, call +386 1 361 90 28.
Why buy from Heka
Heka Interior furnishes company offices and home workspaces.
7-day free trial
We deliver the chair to your address. You have 7 days to try it in your actual work environment. If it's not for you, we'll pick it up at no cost.
Assembled and upholstered in Medvode
We assemble and upholster the ErgoFlex chair in Medvode in the fabric of your choice. Advice is available at our showroom at Žlebe 1.
3-year warranty
The chair comes with a 3-year warranty. Support is available by phone or at our showroom in Medvode.

