Alarm Installation
Alarm Installation in Welwyn and Across Hertfordshire
AV Infusion is based in Welwyn and installs wired and wireless alarm systems for homes and businesses across Welwyn Garden City and Hertfordshire.
AV Infusion is based in Welwyn and installs wired and wireless alarm systems, plus video door entry and keypad access, for homes and businesses across Welwyn Garden City, Hatfield, Stevenage, St Albans, Harpenden, Hertford, Hitchin and the surrounding areas of Hertfordshire.
Where CCTV shows you what's happening, an alarm system actively responds to it — detecting movement or an opened door the moment it happens, and alerting you or a monitoring centre straight away. For a lot of homes, an alarm is the part of a security setup that does the most to stop an incident while it's happening, rather than just recording it afterwards. Our engineers are DBS-checked, and every installation is covered by a 12-month guarantee.
What's Included
What We Cover
- Wired and wireless alarm system installation
- Motion sensors and door/window contacts
- Video door entry and keypad access systems
- Monitored and self-monitored alarm options
- Integration with CCTV where required
- System upgrades and fault repairs on existing alarms
- Panic buttons and additional zone coverage
- Remote arming/disarming via app where supported
Our Process
What to Expect
Site survey
We assess entry points, room layout and how you use the property to plan sensor placement.
Quote
A clear, itemised price for the panel, sensors and any monitoring option you choose.
Installation
Sensors, keypads and the control panel are fitted and cabling is routed neatly.
Handover
We walk you through arming, disarming, and everyday use before we leave.
Common Problems
Signs You Might Need This Service
False alarms going off
Often caused by poorly positioned sensors, low batteries in wireless units, or an ageing system that needs recalibrating.
System not arming properly
A common sign of a faulty zone, sensor or battery that needs diagnosing rather than ignoring.
No monitoring after a fault occurs
Some older systems were never connected to app notifications or a monitoring service, meaning alerts go unnoticed.
Pricing
What Does It Cost?
Alarm installation costs depend on the number of sensors and doors/windows covered, whether you choose wired or wireless, and whether you want a monitored service. A simple entry-level system covering one property costs less than a fully zoned, monitored setup. Call or WhatsApp us with your requirements for a straightforward quote.
Every alarm installation is covered by our 12-month guarantee, and carried out by DBS-checked, fully insured engineers.
FAQs
Common Questions
What's the difference between monitored and self-monitored alarms?
A monitored alarm alerts a monitoring centre who can respond on your behalf; a self-monitored alarm sends alerts directly to your phone for you to act on.
Can I control my alarm remotely?
Where the system supports it, yes — you can arm and disarm from your phone and receive instant alerts.
Do you install video door entry systems too?
Yes, we install video door entry and keypad access systems as standalone units or integrated with your alarm.
Can you upgrade my existing alarm system?
In many cases yes — we can add sensors, replace a faulty panel, or add app connectivity to an existing system.
All work is covered by our 12-month guarantee, and our engineers are DBS-checked and fully insured for your peace of mind.