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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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BMS22 Jul 20268 min
Trend IQ3 End of Life: Which Controllers Actually Need Replacing?
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BMS22 Jul 20268 min
EC-Net vs Niagara: What's Really Running Your Distech BMS (and Whether You're Locked In)
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BMS Maintenance22 Jul 20268 min
BMS Maintenance Contract Costs UK: What Drives the Price (and How to Benchmark Yours)
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BMS Technical22 Jul 20268 min
BMS Points List and I/O Schedule Explained: How to Read the Document That Defines Your System
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Plant Rooms22 Jul 202615 min
Plant Room BMS: The Complete Guide to Controlling Boilers, Chillers, Pumps and Everything In Between
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Careers17 Jul 202612 min
How to Become a BMS Engineer in the UK: Routes, Training and Salary
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Careers17 Jul 202612 min
BMS Courses UK: Training, the BEMS Apprenticeship and What's Actually Worth Doing
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BMS Installation17 Jul 202611 min
How to Choose a BMS Installation Company in the UK
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BMS Installation17 Jul 202611 min
BMS Contractors in the UK: Who Actually Does What
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BMS Installation16 Jul 202611 min
BMS Electrical Installation in Kent: What It Actually Involves
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