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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 Technical22 Apr 20269 min
Siemens Desigo CC vs Honeywell EBI
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BMS Technical22 Apr 202612 min
Distech ECLYPSE vs Trend IQ: Is BACnet Enough to Make Them Talk?
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BMS Technical22 Apr 20268 min
Inheriting a Distech BMS: What FM Managers Actually Find
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BMS Technical22 Apr 202610 min
Trend IQ4 vs Distech ECLYPSE: 2026 Specification Guide
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BMS Technical22 Apr 20267 min
Siemens Desigo CC: More Data Than You Know What to Do With
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BMS Technical22 Apr 20269 min
Schneider EcoStruxure in Multi-Tenant Buildings
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Fire & Life Safety20 Apr 202616 min
Fire Damper Testing UK: Who Is Responsible, What Compliance Looks Like, and How BMS Integration Changes Everything
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BMS Upgrades17 Apr 202618 min
School BMS Upgrade: Costs, Funding, Timelines, and What Your School Actually Needs
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Energy Management13 Apr 202614 min
MEES 2027 Update: The Dropped EPC C Milestone — and What BMS Controls Still Do for Your Rating
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BMS Upgrades8 Apr 202618 min
University BMS Upgrade During Summer: Why the Six-Week Window Decides Your Energy Future
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