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149 articles found
HVAC SystemsFeatured
Why the Frost Stat Is on the Extract Side of a Plate Heat Exchanger
On a plate heat exchanger AHU the frost protection reads the extract, not the incoming fresh air, and engineers rewire it believing it to be a mistake. Why the ice forms on the extract side, how pack frost protection differs from the coil frost stat, and what actually triggers a defrost.
11 Oct 20269 min read
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Latest Articles
HVAC Systems
What Is a Recuperator AHU, and How Does It Compare With a Thermal Wheel?
A recuperator AHU recovers heat through a static plate pack; a thermal wheel does the same job with a rotating matrix and moves moisture with it. What separates them, the efficiency figures the manufacturers actually publish, and the different point schedule each type lands on a controls contractor.
11 Oct 20269 min
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BMS Technical
AHU Controls: How Air Handling Unit Control Sequences Actually Work
A full guide to AHU control sequences: start/stop and optimum start, the damper sequence, fan control, coil sequencing through a deadband, CO₂ demand ventilation, heat recovery by device type, both frost protections, and what to prove at commissioning before you accept a unit.
11 Oct 202612 min
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Case Studies
24V Window Actuator Wiring After a School Roof Replacement
Royal Harbour Academy, Ramsgate: eight weather-damaged 24V window actuator feeds re-cabled in 4 mm² fire-resistant cable, AHU control cabling drawn back and re-terminated, and extract fans wired back to the BMS during a roof replacement.
2 Oct 20267 min
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HVAC Systems
VAV Installation: TROX VAVs & Sontay CO₂ on a Trend BMS
A real VAV installation on a refurbished office floor: four TROX TA-Silenzio extract VAVs and Sontay duct CO₂ sensors wired back to a Trend panel two floors up. Core-by-core terminations, the signal-range and mode checks that decide whether the floor works, and what good looks like at handover.
28 Sept 20269 min
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BMS Technical9 Feb 202610 min
CTs vs CSs in BMS Systems: Current Transformers vs Current Switches
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BMS Technical6 Feb 202614 min
Why Modern Buildings Are Sealed and Why AHUs Are Essential for Fresh Air
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BMS Technical2 Feb 202612 min
Inputs vs Outputs on BMS Devices: Understanding I/O on Trend IQ4NC & IQ ECO 412 Controllers
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Enterprise16 Jan 202610 min
Scalable Multi-Site BMS: Managing a Building Portfolio from One Platform
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Cloud Technology14 Jan 20268 min
Cloud-Based BMS: The Future of Building Management
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Technology7 Jan 20268 min
Wireless BMS Solutions: Benefits and Considerations
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HVAC26 Dec 20258 min
HVAC Controls Integration: Best Practices
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BMS Fundamentals5 Dec 20258 min
Understanding Building Management Systems: A Comprehensive Guide
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BMS Technical28 Nov 202514 min
How to Wire BMS Run, Fault & Hand-Off-Auto Lighting / Switch Circuits
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Smart Building26 Nov 20258 min
What is LightFi? Sensor-Driven Smart Building & BMS Integration Explained
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