Home › Types › Natural Smoke Ventilation (NSHEV)
Natural Smoke Ventilation (NSHEV): Supply, Install, Maintain, Repair & Service
We supply, install, maintain, repair and service natural smoke ventilation (nshev) across the UK, covering Ventlux and all other makes.
Supply from £361.35Price is for the product supplied only: Ventlux SVM Micro 4A controller (core component), as listed on the iComply Supplies shop (iComply is not VAT registered, so no VAT is added). Shop prices can change.This is the lowest-priced related item in our shop; the main unit itself is priced after survey.Installation, maintenance, repair and servicing: POA (price on application, after a free survey and written quote).
What are natural smoke ventilation (nshev)?
Natural smoke and heat exhaust ventilation (NSHEV) uses the buoyancy of hot smoke to escape through high-level AOVs, with low-level inlet air.
Where they are used
The most common system in UK residential stairs, low-rise flats, HMOs and atriums.
Pros
- No fans; simpler
- Low running cost
- Reliable
Cons
- Needs large free areas
- Wind sensitive
Standards and regulations
Smoke control components are covered by the BS EN 12101 series (for example EN 12101-2 for natural smoke and heat exhaust ventilators, EN 12101-3 for powered fans, EN 12101-6 for pressure differential systems, EN 12101-8 for smoke dampers, EN 12101-9 for control panels and EN 12101-10 for power supplies). Design follows Approved Document B (England), BS 9991 (residential) or BS 9999 (other buildings), with Scottish, Welsh and Northern Irish equivalents. Under the Regulatory Reform (Fire Safety) Order 2005 the responsible person must keep systems maintained.
Installation considerations
We check vent locations, inlet air, controller and fire alarm interface. The from price is the smallest controller; full systems are quoted after survey.
Every installation starts with a free survey. We confirm the specification, give you a written quote, install and commission the system, and hand over with test records and instructions.
Maintenance of natural smoke ventilation (nshev)
Planned maintenance keeps natural smoke ventilation (nshev) safe and reliable and gives you records for insurers and inspections. We service Ventlux and all other makes: we check fixings, wear, power and battery backup, controls and safety devices, adjust and lubricate where needed, test operation end to end and leave a written report with any recommended actions.
Repairs
If your natural smoke ventilation (nshev) has stopped working, is noisy, is opening or closing on its own or is showing a fault, we fault-find on site and repair it, often on the first visit using parts from our shop. We repair systems we did not install and work on all common makes.
Servicing
Servicing intervals depend on use and risk; most sites have a service at least once a year, busy or safety-critical systems more often. We can set up a service contract with reminders so it is never missed. Installation, maintenance, repair and service prices are POA after a free survey and quote.
FAQs
Is natural ventilation enough?
For many low-rise stairs, yes; taller buildings may need mechanical systems.
What triggers it?
Smoke detectors or a call point.
Does it need power?
24 V with battery backup.
Do you service and repair natural smoke ventilation (nshev) you did not install?
Yes. We supply, install, maintain, repair and service natural smoke ventilation (nshev) of all common makes, whoever fitted them.
How much does it cost to install or service natural smoke ventilation (nshev)?
Installation, maintenance, repair and servicing are POA (price on application). We give a free chat, free survey and a written quote first.
Related types
Where we work
Popular areas for natural smoke ventilation (nshev) 24
Book a free chat, quote & surveyCall 07517 806082WhatsApp us