The operational pressures Winston 4kW was built to solve
Manufacturers are facing real operational challenges. Winston has been engineered to keep cooling safe, compliant and reliable as regulations, site demands and production pressures continue to evolve.
F-Gas regulation changes take effect from 1 January 2027. Planning your refrigerant strategy now avoids costly retrofits later.
Many sites can't place a chiller outdoors. Roof access, planning and long pipe runs make external units impractical.
Teams need confidence that today's investment stays compliant and serviceable for years to come.
Production can't stop. Cooling has to stay dependable as site demands and layouts keep changing.
Built in response to the challenges manufacturers face every day
- Engineered for future F-Gas compliance
- Developed for smaller, space-limited sites
- Low refrigerant charge — under 150g of R290
- Plug-and-play, with readily available parts
- Built for spaces where other chillers struggle
- Built for indoor operation in real process environments
Winston 4kW wasn't designed in isolation. It was developed in response to the real-world operational challenges our customers face across manufacturing, healthcare, food production, laboratories and specialist process environments.
Typical indoor process cooling applications
Winston 4kW is used across a wide range of indoor process cooling environments where compact, compliant and reliable cooling is required.
Why customers choose Winston 4kW
Every detail is engineered for indoor process cooling — from the low-charge R290 circuit to the plug-and-play design and readily available parts.
Engineered to run safely inside process and production environments.
Built around upcoming F-Gas requirements so it stays viable for years.
Designed for smaller operational spaces where floor area is tight.
Under 150g of R290 — a naturally low-GWP refrigerant.
A simple, reliable, plug-and-play design that's quick to get running.
Built with off-the-shelf parts for straightforward servicing and support.
EER up to 4.78 for efficient, cost-effective process cooling.
Designed, tested and built in-house in the UK by Refcool's own team.
Winston 4kW specifications
Full technical data at a glance. Request the datasheet for the complete specification sheet.
Product
| Product name | Winston 4kW |
|---|---|
| Model number | RC4-1 R290 |
Performance
| Cooling capacity ¹ | 4.2 kW |
|---|---|
| EER ¹ | 4.78 |
| Cooling capacity ² | 3.5 kW |
| EER ² | 4.16 |
| Compressor power input ¹ | 0.878 kW |
Refrigerant Circuit
| Refrigerant | R290 (Propane) |
|---|---|
| Refrigerant charge | 148 g (under 150g) |
| Global Warming Potential | Low GWP (R290 ≈ 3) |
| Compressor | Rotary × 1 |
| Refrigerant circuits | 1 |
Air / Fans
| Fan type | EC × 1 |
|---|---|
| Fan power input | 0.18 kW |
| Total air flow | 1100 m³/h |
Hydraulic Circuit
| Pump | Brushless DC (0.35 kW) |
|---|---|
| Water tank volume | 25 L |
| Water flow rate | 11 l/min |
| Nominal water pressure | 1.1 bar |
| Water connections | ½″ BSP |
Electrical
| Power supply | 230 / 1 / 50 (V/Ph/Hz) |
|---|---|
| Max absorbed current | 8.5 A |
Acoustic & Dimensions
| Sound pressure ³ | 70 dB(A) |
|---|---|
| Dimensions (W × D × H) | 750 × 900 × 1444 mm |
| Shipping weight | 180 kg |
¹ Water inlet/outlet +20/+15 °C at +25 °C ambient air. ² Water inlet/outlet +12/+7 °C at +25 °C ambient air. ³ Sound pressure at 3 m in open field. Declared cooling efficiencies do not include pump & fan motor power input.
The engineering details behind Winston
- Shipping weight 180 kg
- Designed & tested in-house in the UK
- Compact footprint — 750 × 900 × 1444 mm
- Aluminium chassis with stainless steel panels
- Rotary compressor
- Under 150g charge (148 g)
- R290 refrigerant — naturally low GWP
- EC condenser fan — 1100 m³/h air flow
- 25 L buffer tank
- Brushless DC pump
- ½″ BSP water connections
- 11 l/min water flow rate
- UKCA marked
- EC fan control
- Safety switches and alarms
- Bluetooth app-compatible controls
Speak directly with the Refcool team
Winston 4kW is built by the people who'll answer your call. Tell us about your process and our own engineers will help you work out whether Winston is the right fit — or point you towards a better-suited solution. No call centres, no sales scripts.
- Direct access to our UK engineering team
- Honest, practical advice on suitability
- Support from the manufacturer, start to finish
