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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 Technical11 Mar 202614 min

BMS for Data Centres: Why Standard Building Automation Isn't Enough

A standard commercial BMS configured for office comfort is the wrong tool for a data centre. This guide covers what a properly specified data centre BMS monitors, what standards apply, and what goes wrong when precision cooling and environmental monitoring aren't treated as life-safety systems.

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BMS9 Mar 20268 min

BMS for Commercial Offices: Smart Building Controls That Cut Costs and Attract Tenants

How a well-configured Building Management System transforms commercial office buildings — reducing energy costs, improving tenant comfort, and meeting MEES compliance deadlines.

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BMS Fundamentals4 Mar 202611 min

BMS for Healthcare Buildings: Controls for Hospitals, Clinics and Care Homes

Healthcare buildings have the most demanding BMS requirements of any sector. From HTM 03-01 pressure differentials in isolation rooms to operating theatre temperature tolerances of ±1°C, discover how specialist BMS configuration protects patients and satisfies CQC compliance requirements.

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BMS Fundamentals2 Mar 202610 min

BMS for Schools and Education Buildings: A Guide for Facilities Managers

Schools have unique BMS requirements — variable occupancy, strict BB101 ventilation standards, tight energy budgets, and non-specialist site managers. This guide covers what good BMS looks like in the education sector.

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HVAC Systems27 Feb 20269 min

Heat Pump BMS Integration: Controls for Air Source and Ground Source Systems

Heat pumps require more sophisticated controls than gas boilers to operate efficiently. This guide covers how BMS integration unlocks the full performance of air source and ground source heat pumps in commercial buildings.

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Energy Management25 Feb 202610 min

MEES Compliance and BMS: The Route to EPC B by 2031

The June 2026 government update dropped the 2027 EPC C milestone: larger commercial buildings now face EPC B by 2031. This guide explains how BMS upgrades and HVAC controls improvements can push an EPC rating up by one or two bands — and how to make the financial case.

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Energy Management18 Feb 202610 min

How to Reduce Commercial Building Energy Costs with a BMS

Commercial buildings waste 20–40% of energy through poor controls and unoptimised systems. This guide covers the practical BMS strategies that deliver the biggest energy savings — from basic scheduling to advanced optimisation techniques.

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BMS Technical16 Feb 202612 min

BACnet vs Modbus: Which Protocol Should Your BMS Use?

BACnet and Modbus are the two most common protocols used in building management systems. This guide explains the practical differences, when to use each, and how to handle buildings that have both.

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BMS Fundamentals13 Feb 20269 min

BMS Upgrade and Retrofit Cost UK: Price Per Point

How much does it cost to retrofit a BMS in the UK? This guide covers realistic cost ranges for building management system installations and upgrades, broken down by building size, system scope, and common variables that affect the final price.

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BMS Fundamentals11 Feb 202610 min

What is a Building Management System? A Plain English Guide

A building management system (BMS) controls and monitors everything from heating and cooling to lighting and security in a commercial building. This guide explains how BMS works, what it controls, and why your building needs one.

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Building Management Insights

Why the Frost Stat Is on the Extract Side of a Plate Heat Exchanger

Latest Articles

More Articles

BMS for Data Centres: Why Standard Building Automation Isn't Enough

BMS for Commercial Offices: Smart Building Controls That Cut Costs and Attract Tenants

BMS for Healthcare Buildings: Controls for Hospitals, Clinics and Care Homes

BMS for Schools and Education Buildings: A Guide for Facilities Managers

Heat Pump BMS Integration: Controls for Air Source and Ground Source Systems

MEES Compliance and BMS: The Route to EPC B by 2031

How to Reduce Commercial Building Energy Costs with a BMS

BACnet vs Modbus: Which Protocol Should Your BMS Use?

BMS Upgrade and Retrofit Cost UK: Price Per Point

What is a Building Management System? A Plain English Guide

Ready to Optimise Your Building?