Trend, Distech & Siemens Controls Installation
As certified installers and programmers of leading control systems, we deliver expert implementation of Trend, Distech Controls, and Siemens building automation solutions.
Leading Control System Platforms
We specialise in the installation, programming, and maintenance of industry-leading control systems
Complete Control System Services
From initial design through to ongoing support, we provide comprehensive services for all major control system platforms.
- System design and specification
- Installation and commissioning
- Programming and configuration
- Integration with existing systems
- Operator training and documentation
- Ongoing maintenance and support
- System upgrades and migrations
- 24/7 emergency callout service
Further Reading
- Trend vs Distech vs Siemens: Which BMS Platform is Right for You?
- Trend 963 End of Life: Upgrading to IQVISION
- Understanding I/O on Trend IQ4NC & IQ ECO 412 Controllers
Case Studies
- 10 Whitechapel — Trend IQ4 ECO Controls and BACnet Integration
BACnet/IP integration, Sontay field devices, CO₂ sensors and chilled beam controls within a live commercial fit-out.
- Pinsent Masons — 16-Floor Trend FCU Controller Upgrade
New Trend controllers and fresh/return air sensors deployed across 16 floors with Light-Fi backbone integration.
Frequently Asked Questions — Building Controls
What is the difference between Trend, Distech and Siemens building controls?
Trend, Distech, and Siemens are the three most widely used BMS controller platforms in UK commercial buildings. Trend (owned by Honeywell) uses a proprietary IQ controller range popular in offices and education. Distech Controls uses the open Niagara framework and is common in higher-education and healthcare. Siemens Desigo CC is widely specified in large commercial and public-sector projects. Alpha Controls are certified installers for all three platforms and will advise on the best fit for your building and budget.
Can you upgrade a Trend 963 system without replacing all controllers?
Yes. The recommended migration path from Trend 963 to IQVISION preserves existing IQ2 and IQ3 field controllers where they are in good condition, replacing only the supervisor software and communication infrastructure. Alpha Controls carries out phased 963 to IQVISION migrations that minimise capital cost and disruption, typically completing supervisor upgrades without touching working field controllers.
How do BMS controllers communicate with HVAC equipment?
BMS controllers communicate using a mix of hardwired and network-based connections. Traditional analogue and digital I/O connects directly to sensors, actuators, and relays. Network protocols — BACnet MS/TP, BACnet/IP, Modbus, and LON — allow controllers to exchange data with variable speed drives, chillers, heat pumps, and other intelligent plant. Alpha Controls designs communication architectures for new installations and retrofits existing systems to open-protocol networks.
What is DDC and how does it differ from simple on/off controls?
Direct Digital Control (DDC) uses microprocessor-based controllers with PID algorithms to maintain precise setpoints — for example, holding a supply air temperature to within 0.5°C of target. Simple on/off controls just switch equipment on when a threshold is crossed and off when it drops back, causing hunting, poor comfort, and energy waste. DDC delivers better comfort, lower energy use, and enables sophisticated strategies such as weather compensation, demand-controlled ventilation, and predictive pre-heat.
Are Alpha Controls authorised Trend and Distech partners?
Yes. Alpha Controls are certified Trend Authorised Contractors and Distech Controls certified partners. Our engineers hold manufacturer-issued certifications for installation, commissioning, and programming of Trend IQ4 and Distech EC-BOS controllers. We also have Siemens-trained engineers. These certifications are required to carry out warranty-compliant work and access manufacturer technical support.
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Our certified engineers are ready to help with your Trend, Distech, or Siemens controls project.
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