230V vs 24V — Which Wiring?
- 230V: Direct from wiring centre. Simpler for small systems (≤6 zones). No transformer needed.
- 24V: Requires 24V transformer (typically in wiring centre). Safer, preferred for larger systems, compatible with BMS/KNX.
Controls & Thermostats
Zone control for wet UFH systems. DT digital, DS dial, PRT programmable thermostats. 230V & 24V actuators, wiring centres (2–12 zone), bypass valves, remote sensors.
Room Thermostats
| Model | Type | Display | Voltage | Features | List Price | Trade Price |
|---|---|---|---|---|---|---|
| DT | Digital | LCD backlit | 230V / Battery | Weekly program, frost protect, floor sensor input | £67.08 | £48.38 |
| DT-NTS | Digital | LCD backlit | 230V | No time schedule, simple on/off | £58.00 | £41.80 |
| DS | Dial | Analog | 230V / Battery | Simple rotary, floor limit sensor | £43.20 | £39.60 |
| DS-SB | Dial | Analog | 230V | Surface box mount | £48.00 | £34.60 |
| PRT | Programmable | LCD | 230V / Battery | 7-day, 4 periods/day, holiday mode | £78.00 | £56.20 |
| PRT-E | Programmable | LCD | 230V | Ethernet / app control | £145.00 | £104.50 |
| PRT-EL | Programmable | LCD | 230V | RF wireless, no wiring to manifold | £165.00 | £119.00 |
Thermal Actuators (M30×1.5)
| Model | Voltage | Type | Open/Close Time | List Price | Trade Price |
|---|---|---|---|---|---|
| NovaDrive 230V | 230V AC | Normally closed | 3–4 min | £28.00 | £20.20 |
| NovaDrive 24V | 24V AC/DC | Normally closed | 3–4 min | £28.00 | £20.20 |
| TeloStat 230V | 230V AC | Normally closed | 4–5 min | £24.00 | £17.30 |
| TeloStat 24V | 24V AC/DC | Normally closed | 4–5 min | £24.00 | £17.30 |
| TopDrive 230V | 230V AC | Normally open | 3–4 min | £32.00 | £23.10 |
| TopDrive 24V | 24V AC/DC | Normally open | 3–4 min | £32.00 | £23.10 |
Wiring Centres
| Zones | Code | Voltage | Actuator Outputs | Pump Relay | List Price | Trade Price |
|---|---|---|---|---|---|---|
| 2 | WC-2Z | 230V | 2 | Yes | £42.00 | £30.30 |
| 4 | WC-4Z | 230V | 4 | Yes | £58.00 | £41.80 |
| 6 | WC-6Z | 230V | 6 | Yes | £74.00 | £53.30 |
| 8 | WC-8Z | 230V | 8 | Yes | £90.00 | £64.80 |
| 10 | WC-10Z | 230V | 10 | Yes | £106.00 | £76.40 |
| 12 | WC-12Z | 230V | 12 | Yes | £122.00 | £87.90 |
Bypass & Mixing Valves
| Model | Type | Connection | Adjustment | List Price | Trade Price |
|---|---|---|---|---|---|
| Gold RS50 | Straight bypass | 1″ / 22mm | Fixed 0.5 bar | £38.00 | £27.40 |
| Gold RS60 | Angled bypass | 1″ / 22mm | Fixed 0.5 bar | £42.00 | £30.30 |
| FHV-R | Thermostatic mixing | 1″ / 22mm | 20–60°C | £125.00 | £90.00 |
| Wilo Smart-A | Smart pump + mixing | 1½″ | App controlled | £485.00 | £349.00 |
| Wilo Stratos | High-efficiency pump | 1½″ | Variable speed | £620.00 | £446.00 |
Control System Selection
Thermostat Selection
- DT: Best value digital with programming
- DS: Simplest, tamper-resistant (landlords)
- PRT: Full 7-day programming
- PRT-EL: Wireless — retrofit friendly
- PRT-E: Smart home integration