The SPC CurveVector is a ceiling-mounted cassette heater designed to deliver efficient space heating with even, 360° air distribution. Engineered to fit discreetly into standard 600mm x 600mm suspended ceiling grids (or to integrate into open ceiling designs), the CurveVector keeps floor and wall space entirely clear, making it ideal for spaces where aesthetics, acoustics, and usable area all matter.
Compatible with heat pumps, condensing boilers, and waste heat recovery systems, the CurveVector is suited to a wide range of commercial, education, retail, and public sector environments. Only the stylish circular grille is visible from room level.
Key Benefits
- 360° circular air discharge – heated air is distributed evenly across the full room at a fixed 45° downward angle, eliminating cold spots even at low fan speeds
- Ceiling-mounted, space-saving design – recessed into the ceiling grid, leaving all walls and floors completely free for furniture, shelving, and displays
- Low water temperature compatible – works efficiently with heat pumps (45/35°C), condensing boilers (60/40°C), and standard boiler systems (80/70°C)
- Energy-efficient EC fan motor – radial backward-curved fan with external rotor EC motor and ball bearings; IP44 rated with auto-reset thermal overload protection
- Quiet operation from 29 NR – suitable for noise-sensitive environments including libraries, offices, and healthcare waiting areas
- Smart suspension system – adjustable mounting brackets allow installation before or after the ceiling is fitted, with repositioning in any direction for accurate alignment
- Tamper-proof installation – recessed mounting reduces risk of damage or interference, suitable for high-traffic and high-ceiling environments
- Easy maintenance – bayonet-catch air inlet grille provides quick access to the filter for cleaning or replacement without specialist tools
How the CurveVector Works
The CurveVector operates through a straightforward recirculation process:
- Air intake – room air is drawn in through the perforated central section of the circular grille
- Heating – air passes through the copper tube and aluminium fin heating coil, warmed by the hot water system
- Discharge – heated air is discharged evenly in a full 360° pattern through openings around the grille perimeter
- Penetration – air is directed downward at a fixed 45° angle for effective room penetration
This circular discharge pattern ensures consistent comfort throughout the space, even at low fan speeds. For best performance, the unit should be mounted at a height of between 2.0 and 3.5 metres from floor to discharge grille.
Technical Specification
| Specification | Detail |
|---|---|
| Ceiling grid compatibility | 600mm x 600mm suspended ceiling grids |
| Unit height above ceiling | 300mm |
| Recommended mounting height | 2.0 – 3.5m (floor to discharge grille) |
| Weight | 32kg |
| Electrical supply | 230V / 1ph / 50Hz |
| Max fan power | 155W |
| Max current | 1.6A |
| Pipework connections | 22mm copper (flow and return) |
| Max operating pressure | 8 bar at 90°C |
| Casing | Zinc-plated sheet steel with reinforcement and internal sound-absorbing insulation |
| Fan type | Radial backward-curved, aluminium casing and impeller |
| Motor | External rotor EC motor with ball bearings |
| Motor protection | IP44, thermal overload protection (auto-reset) |
| Grille | Rotatable plastic grille, RAL 9016 white (other RAL colours available on request) |
| Discharge air temperature limit | 65°C (integral thermostatic valve) |
| Coil options | H2: 2-row coil / H3: 3-row coil |
Installation
Smart Suspension System
The CurveVector can be installed before or after the ceiling is fitted. Adjustable mounting brackets allow the unit to be repositioned in any direction for accurate alignment with the ceiling grid. Two suspension brackets are supplied as standard.
For installations in ceiling types other than standard suspended grids, including open commercial or solid ceilings, an inspection hatch must be included to allow access for maintenance.
Pipework Connections
Both coil options use 22mm copper connections on flow and return. The side-mounted pipe connections and rotatable grille allow flexible orientation to suit different ceiling void configurations. A minimum of 200mm clearance from nearby pipework is required for the electronics module for serviceability.
Control Options
The CurveVector is available with a comprehensive range of control options to suit different building types and user requirements.
Remote thermostats:
- On/off control
- Speed change
- Proportional control
Remote switches:
- Manual on/off
- Multi-speed switching
- Summer/winter changeover
Low water temperature cut-out: An adjustable feature that switches the unit off automatically when hot water is not available, protecting both the system and occupants.
Ideal Applications
The CurveVector is well suited to environments where heating performance, acoustic comfort, and visual discretion are all important.
- Education – schools, universities, and colleges, particularly in corridors, entrance halls, and multi-purpose teaching spaces
- Commercial – offices, reception areas, and banks where wall space is reserved for screens, storage, or signage
- Retail – shops and showrooms where clear perimeter walls are essential for product display
- Healthcare – hospitals and healthcare waiting areas where quiet operation and unobstructed circulation space are priorities
- Hospitality – hotels and reception areas where aesthetics and acoustic comfort matter
- Public spaces – libraries, museums, and town halls where low noise output is essential
Frequently Asked Questions
Yes. The CurveVector has been designed to operate effectively at the lower flow temperatures typical of heat pump systems. Specifying the 3-row coil option (H3) ensures meaningful output at flow/return temperatures of 45/35°C, where the unit delivers between 2.9kW and 4.1kW depending on fan speed. For condensing boiler systems at 60/40°C, the H3 coil delivers between 4.2 kW and 5.9 kW. The standard 2-row coil (H2) is designed for boiler supply temperatures of around 80/70°C.
The CurveVector is the right choice when wall space is fully committed, for example, in classrooms where all walls carry whiteboards, displays, or shelving; in retail spaces where perimeters are dedicated to product display; or in open-plan offices where partition arrangements change frequently. The ceiling-mounted position also makes it suitable for high-traffic corridors and entrance areas where wall-mounted units could be at risk of damage or obstruction.
The CurveVector is designed primarily for standard 600mm x 600mm T-bar suspended ceiling grids, which are the most common commercial ceiling system in the UK. It can also be installed in open commercial ceilings or suspended from solid ceilings using the supplied adjustable brackets. For any installation other than a standard suspended grid, an inspection hatch must be incorporated to allow access for maintenance. The unit should not be installed in sealed or inaccessible ceiling voids.
For optimal heating performance and air distribution, the unit should be mounted at a height of between 2.0 and 3.5 metres, measured from the floor to the discharge grille. This range ensures the 45° downward air discharge reaches the occupied zone effectively across all fan speeds.
The CurveVector operates from 29 NR at low fan speed, rising to 35 NR at medium and 39 NR at high. This makes it particularly appropriate for environments with strict acoustic requirements, such as libraries, healthcare waiting areas, meeting rooms, and study spaces. Noise ratings are based on Q=2, R=4m, V=300m³ with a reverberation time of 0.4 seconds.
The standard grille is supplied in RAL 9016 white, which suits the majority of suspended ceiling environments. Alternative RAL colours are available on request. Contact the SPC team on 0116 249 0044 or at spc@spc-hvac.co.uk to discuss non-standard finishes.
Yes. The bayonet-catch air inlet grille provides quick access to the internal filter, which can be cleaned or replaced as needed. In typical commercial environments, the filter should be inspected every three to six months, and more frequently in dusty or high-occupancy spaces. The electronics module is accessible from the side of the unit and requires a minimum of 200mm clearance from nearby pipework. The coil and fan motor should be checked annually as part of routine HVAC maintenance.
