School Heating Systems
The challenge is that no single heating product type can serve every space in a modern school or college estate. Classrooms, corridors, assembly halls, dining areas, and SEN settings each have different ceiling heights, occupancy patterns, and performance requirements. Specifying a one-size-fits-all system means compromising performance across the whole campus.
Biddle's dual-system approach – combining the Forceflow 900 Series fan convectors for wall-mounted applications with the Comfort Circle Cassette Heater for suspended-ceiling spaces – delivers the right heating solution for every room type, from nursery classrooms to sixth-form atriums, and is fully compatible with low-carbon heat pump systems.
Fast Heat: Biddle Forceflow Fan Convectors
The Biddle Forceflow 900 Series is the product of over 50 years' experience in heating for education environments. Unlike radiators, which rely on natural convection and take considerable time to raise room temperature, fan convectors actively circulate air through a heat exchanger, delivering rapid warm-up from cold – a critical advantage in schools that are unoccupied overnight and must reach the DfE BB101 minimum of 18°C before pupils arrive.
The Carbon Trust notes that adjusting heating run times by just one hour per day can cut heating bills by 10%. Forceflow's fast warm-up response makes tighter scheduling practical, allowing start times to be pushed later without sacrificing comfort at the bell.
Four variants cover every education application:
- Forceflow H2 Select: Standard classrooms, offices, corridors and libraries. 21 mounting styles, up to 19.92 kW, NR 29–46 noise range
- Forceflow CB (Low Water Temperature): Designed for air source heat pump (ASHP) integration. Oversized coil for 60/40°C operation – ideal for PSDS-funded low-carbon upgrades
- Forceflow LST (Low Surface Temperature): Surface temperature guaranteed ≤43°C. BSRIA-tested to deliver more than twice the heat output per metre of an equivalent LST radiator. Required in nurseries, infant schools and SEN settings
- Forceflow Sectional: Drop-in replacement for existing back-access units, using existing wall apertures to minimise building works and installation cost on retrofit projects
All Forceflow models include a low water temperature cut-out thermostat to prevent fan motors running against a cold coil, and a summer mode that circulates ambient air without heating – useful across the warmer months without requiring active cooling.
Heating From Above: Comfort Circle Cassette Heaters
Assembly halls, dining rooms, atriums, and open-plan teaching blocks present a different challenge: large floor areas with suspended tile ceilings, where wall-mounted units cannot achieve even heat distribution. The Biddle Comfort Circle Cassette Heater is designed precisely for these spaces.
Fitting within a standard 600mm × 600mm suspended ceiling grid, the unit is completely recessed with only the circular grille visible from below – an important consideration in educational environments where clean sightlines and minimal disruption to teaching matter. Its 360° circular air discharge draws air in through the perforated centre, heats it, and discharges it evenly outward at a fixed 45° angle toward the floor, eliminating the hot spots and cold zones common with directional ceiling units.
Key technical data (CC60 model): up to 9.0 kW at 82/71°C or 5.8 kW at 60/40°C; NR 29–39 noise range; IP44 motor protection; 3-year on-site warranty. The Advanced (ADV) control allows a single programmable panel to operate up to 10 units simultaneously – ideal for facilities management across an entire wing – with a programmable week timer and key lock for tamper resistance.
Compatibility with low water temperature systems, including air source heat pump waste heat at 60/40°C, makes the Comfort Circle a straightforward fit for schools pursuing Public Sector Decarbonisation Scheme (PSDS) grant funding for low-carbon heating upgrades.
Two Heaters Are Better Than One: Dual-System Heating Approach
Real-world school installations consistently demonstrate the advantages of specifying the right product for each space type rather than standardising on a single unit across the entire estate.
When Biddle worked with KGA Partnerships at Skipton Academy – a system designed from the outset for future heat pump integration – the school's varied layout required multiple Forceflow styles to be deployed together to achieve optimal performance across all areas. A single product in a single configuration would have meant compromise throughout.
The dual-system logic in practice:
- Classrooms & corridors: Forceflow wall-mounted units deliver rapid warm-up, room-by-room zoned control, and easy filter access with no ceiling disruption required for servicing
- Halls & dining areas: Comfort Circle cassette heaters deliver even heat across large floor plates without consuming wall space
- Heat pump-connected systems: Both the Forceflow CB and Comfort Circle LTHW-compatible coil operate at 60/40°C – no high-temperature boiler plant required
- SEN, nurseries & infant settings: Forceflow LST units (surface ≤43°C) serve vulnerable-occupant areas; standard H2 Select models cover the remainder – all on the same pipework
- Retrofit projects: The Forceflow Sectional variant uses existing wall apertures, minimising building works. A Biddle site survey at a Buckinghamshire primary school identified specification changes that saved over £2,000 versus the original like-for-like proposal
Show Your Working: Biddle Installations
Three London Borough of Croydon primary schools (Summer 2023): Biddle worked with Clairglow Heating Ltd to refurbish heating at St Giles School, Greenvale Primary School, and Ridgeway Primary School & Nursery. Forceflow H2 Select units were specified throughout – classrooms, gymnasiums and main halls – with all three projects delivered on time and within budget.
"Our successful working relationship started with an on-site meeting with Biddle's commercial manager... Additional technical support ensured that all fan coil units were correctly sized and positioned within all three school projects. Every unit was delivered directly to site and on time, with no delays whatsoever."
– Graham Edwards, Commercial Manager, Clairglow Heating Ltd
Ready to Specify?
Biddle's technical team offers free on-site surveys and product selection consultations across the UK. Whether you are planning a new-build specification, a phased retrofit, or a heat pump-ready upgrade, we can identify the optimal combination of products for each space across your estate.
T: +44 (0) 2476 384 233
E: sales@biddle-air.co.uk
W: www.biddle-air.co.uk
FAQs
Are Biddle fan convectors compatible with heat pump systems?
Yes. The Forceflow CB is specifically engineered for air source heat pump (ASHP) integration, featuring an oversized coil optimised for low water temperature (LWT) operation at 60/40°C – the typical flow/return temperatures of modern heat pumps. The Comfort Circle Cassette Heater is also compatible with heat pump waste heat at these temperatures. This makes both products suitable for schools accessing Public Sector Decarbonisation Scheme (PSDS) grant funding for low-carbon heating upgrades. Skipton Academy specified the Forceflow range specifically to enable future heat pump integration without a full system replacement.
What heating solution is required for nurseries, infant schools, and SEN settings?
In settings where children or vulnerable users may be present, the Health and Safety Executive (HSE) advises that heating surface temperatures should not exceed 43°C. The Biddle Forceflow LST (Low Surface Temperature) variant is designed specifically for this requirement, with surface temperature guaranteed not to exceed 43°C and independently BSRIA-tested to deliver more than twice the heat output per metre of an equivalent LST radiator. For schools with mixed populations – for example, a mainstream primary with an attached SEN unit – the Forceflow LST can serve vulnerable-occupant areas while standard H2 Select models cover the remainder of the building, all connected to the same pipework.
How much could a school save by improving its heating system and controls?
According to the Carbon Trust, UK schools collectively spend £543 million per year on energy, with around 25% (approximately £135 million) potentially saveable through efficiency measures including better-specified heating equipment and improved controls. The Carbon Trust identifies that adjusting heating run times by just one hour per day can reduce heating bills by 10% – which for a secondary school spending £90,000 annually on energy represents a saving of up to £9,000 per year. Fan convectors such as the Forceflow 900 Series enable tighter scheduling by delivering rapid warm-up from cold, allowing heating start times to be pushed later without sacrificing classroom comfort. Both the Forceflow H2 Select and the Comfort Circle ADV control include programmable weekly timers, supporting different schedules for each day of the week including inset days and half-terms.