FREE DELIVERY ON ORDERS OVER £50 IN THE UK & EU
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Cold weather can cause significant damage to exposed pipework, valves and water systems. Frozen pipes can burst, interrupt water supplies, damage buildings and lead to costly repairs. For commercial and industrial facilities, these problems can also result in expensive downtime and potential health and safety risks.
An Envirostat Frost Protection Controller is specifically designed to prevent these issues by automatically controlling electric heater tape and frost protection heating systems. By monitoring ambient or pipe temperatures, the controller only switches heating on when required, helping protect pipework while reducing unnecessary energy consumption.
In addition to preventing frozen pipes, selected Envirostat models are also designed to help maintain water temperatures that reduce the risk of Legionella bacteria, making them ideal for healthcare, commercial buildings, public facilities and industrial applications.
Explore United Automation’s range of Envirostat Frost Protection Controllers to find the right solution for your installation.
An Envirostat Frost Protection Controller is an electronic temperature controller designed to operate electric heater tape installed on external or exposed pipework.
Unlike simple frost thermostats that switch heating on at one fixed temperature, Envirostat controllers provide intelligent control by monitoring environmental conditions and supplying power only when necessary.
This ensures that pipework remains protected during cold weather while avoiding unnecessary energy use.
Typical systems protect:
Because heating operates only when required, Envirostat controllers offer a far more energy-efficient solution than continuously energised heater tape.
An Envirostat controller continuously monitors temperature using an external sensor positioned near the pipework or the surrounding environment.
The operating sequence is straightforward.
The controller constantly measures the surrounding temperature.
When the temperature remains above the programmed setpoint, no heating is required.
As temperatures begin to approach freezing conditions, the controller detects that the preset threshold has been reached.
The controller automatically energises the connected heater tape.
Heat is applied only when necessary, protecting pipework from freezing without wasting electricity.
Once temperatures rise above the programmed value, the controller automatically switches the heating off.
This intelligent operation provides continuous frost protection while reducing running costs.
Traditional frost thermostats simply switch heating on and off using a basic temperature switch.
An Envirostat offers a much higher level of control by providing:
For commercial installations, these advantages quickly outweigh the small increase in initial investment.
One of the unique advantages of selected Envirostat models is their ability to support hot water temperature maintenance.
Legionella bacteria can multiply in stagnant water when temperatures remain between approximately 20°C and 45°C.
By maintaining pipe temperatures above this range where appropriate, Envirostat controllers help support building water safety strategies and assist facilities managers in complying with recommended water hygiene practices.
Applications include:
Maintaining safe water temperatures helps reduce health risks while ensuring reliable operation throughout the year.
Protect pipes with Envirostat – Frost Protection Controllers. Prevent freezing, reduce Legionella risk, and control heating automatically.
Automatic Frost Protection: Heating operates only when freezing conditions are detected.
Improved Energy Efficiency: Electric heater tape is energised only when required, significantly reducing energy consumption compared with permanently powered systems.
Reduced Maintenance Costs: Preventing frozen pipes reduces:
Increased System Reliability: Automatic operation ensures continuous protection even during prolonged periods of cold weather.
Simple Installation:
United Automation offers a comprehensive range of Envirostat frost protection controllers for commercial, industrial and HVAC applications. The range includes standard temperature-controlled models, intelligent controllers with fault monitoring and BMS integration, reverse-logic controllers for fan applications, and dual-temperature solutions for more advanced temperature-maintenance requirements.
The FP4E provides 4kW of electronic frost protection for heater tape and infrared (IR) quartz heating applications operating at 230V.
It automatically controls the heating load as temperatures fall below the selected set point. As a result, it can help protect commercial and industrial pipework and other equipment from freezing and ice damage.
The FP4E includes a 2m encapsulated temperature sensor and soft-start operation. In addition, its robust IP65 enclosure allows use in demanding indoor and outdoor installations.
The FP4ER provides 4kW of reverse-logic frost protection for fan and HVAC applications.
Unlike standard Envirostat controllers, the FP4ER does not switch a heating load on as temperatures fall. Instead, it switches fans off as ambient temperatures approach freezing. Consequently, it can help prevent cold air from circulating through areas where low temperatures could contribute to frozen pipework or equipment damage.
The FP4ER provides a maximum load capacity of 20A. It also features a 2m encapsulated temperature sensor, soft-start operation, solid-state switching and an IP65 enclosure.
The standard temperature range runs from -10°C to +10°C, while an alternative 0°C to +20°C range is also available.
The FP4i combines 4kW electronic frost protection with enhanced monitoring and control.
It automatically regulates the heating load according to the selected temperature set point. At the same time, its intelligent monitoring features provide additional system status and fault information.
Therefore, the FP4i suits commercial and industrial frost protection systems where operators need more than basic temperature control. Its 4kW/20A capacity, temperature sensor, soft-start operation and IP65 enclosure provide a robust solution for a wide range of frost protection applications.
The FP4iR combines the reverse-logic operation of the FP4ER with enhanced monitoring and alarm functionality.
It provides 4kW/20A capacity for HVAC fans, air-handling equipment and other systems where fans need to switch off as temperatures approach freezing.
In addition, the FP4iR provides a 2m encapsulated temperature sensor and soft-start operation. It also monitors the system for output and load faults, while LED indicators provide useful operating and alarm information.
Furthermore, the controller monitors the temperature sensor for open- and short-circuit conditions. As a result, the FP4iR provides a strong solution for commercial and industrial HVAC installations that require both reverse-logic frost protection and enhanced fault monitoring.
The FP6E provides higher-capacity electronic frost protection for larger heating systems operating at 230V.
It can control heater tape and infrared (IR) quartz heating systems with a maximum load of 6kW/25A. Consequently, it suits longer pipe runs, larger commercial installations and industrial frost protection applications where the heating system requires greater capacity.
The FP6E also includes a 2m encapsulated temperature sensor and soft-start operation. Furthermore, its IP65 enclosure helps protect the controller in demanding indoor and outdoor environments.
The controller automatically regulates the heating load according to the selected temperature. Therefore, it provides a practical solution for protecting pipework, water systems and other equipment from freezing and ice damage.
The FP6i provides advanced 6kW electronic frost protection for pipework, valves, tanks, water systems, heater tape and infrared heating installations.
It supports loads up to 6kW/25A at 230V and incorporates a 2m encapsulated temperature sensor. The controller provides adjustable temperature control from 0°C to +20°C, while soft-start switching helps provide controlled operation of the heating load.
More importantly, the FP6i provides output and load fault detection. It also monitors the temperature sensor for open- or short-circuit conditions. In addition, a BMS alarm relay allows the controller to communicate alarm conditions to a building management system.
The FP6i uses an IP65 enclosure, making it suitable for indoor and outdoor commercial and industrial environments. For example, applications include pipework, water supply systems, process pipework, trace heating, valves and manifolds, storage tanks and HVAC frost protection.
As a result, the FP6i provides more than automatic temperature control. It gives engineers and building operators additional visibility of system faults and alarm conditions.
The MP6i provides multi-purpose temperature control for applications requiring both frost protection and wider temperature regulation.
Unlike dedicated frost protection controllers, the MP6i offers two selectable temperature ranges:
Therefore, the MP6i can control applications that require temperatures well above conventional frost protection levels. For example, engineers can use it with heater tape, infrared heating and other commercial or industrial heating systems.
The MP6i also includes a 2m encapsulated temperature sensor and soft-start operation. Furthermore, it provides output and load fault detection, temperature sensor monitoring and BMS alarm integration.
Its IP65 enclosure also makes the controller suitable for demanding indoor and outdoor installations. Consequently, the MP6i provides a flexible solution where a single controller needs to deliver both frost protection and higher-temperature regulation.
United Automation’s Envirostat range provides a solution for different frost protection and temperature control requirements.
For standard 4kW frost protection, the FP4E provides straightforward electronic temperature control. Meanwhile, the FP4ER adds reverse-logic operation for fan and HVAC applications.
For installations that require enhanced monitoring, the FP4i provides intelligent 4kW frost protection, while the FP4iR combines intelligent monitoring with reverse-logic fan control.
For larger heating loads, the FP6E provides 6kW frost protection. In contrast, the FP6i adds advanced fault detection and BMS alarm integration for installations that require additional system monitoring.
Finally, the MP6i provides the greatest temperature-control flexibility, with selectable ranges extending from -10°C to +130°C.
Together, these controllers allow engineers to select an Envirostat solution according to the heating capacity, temperature range, application and monitoring requirements of the installation.
£165.00 ex. VAT
£143.00 ex. VAT
| Model | Power | Logic/Function | Temperature Range | Monitoring |
|---|---|---|---|---|
| FP4E | 4kW / 20A | Standard frost protection | -10°C to +10°C* | Basic |
| FP4ER | 4kW / 20A | Reverse logic | -10°C to +10°C* | Basic |
| FP4i | 4kW / 20A | Intelligent frost protection | -10°C to +10°C* | Enhanced |
| FP4iR | 4kW / 20A | Reverse logic + intelligent | -10°C to +10°C* | Enhanced fault detection |
| FP6E | 6kW / 25A | Standard frost protection | -10°C to +10°C* | Alarm indication |
| FP6i | 6kW / 25A | Intelligent frost protection | 0°C to +20°C | Fault detection + BMS |
| MP6i | 6kW / 25A | Multi-purpose temperature control | -10°C to +60°C / +60°C to +130°C | Fault detection + BMS |
* Alternative temperature ranges are available on certain models. The exact range should be stated against the individual product rather than implying every model has identical settings.
Envirostat Frost Protection Controllers are widely used throughout commercial and industrial buildings.
Common applications include:
| Feature | Standard Frost Thermostat | Envirostat Frost Protection Controller |
|---|---|---|
| Automatic heater tape control | Basic | Advanced |
| Temperature accuracy | Moderate | High |
| Energy efficiency | Moderate | Excellent |
| Pipe protection | Good | Excellent |
| Legionella temperature maintenance | No | Selected models |
| Commercial applications | Limited | Extensive |
| Long-term running costs | Higher | Lower |
An Envirostat Frost Protection Controller provides an intelligent and energy-efficient solution for protecting exposed pipework, valves and water systems against freezing temperatures.
By automatically controlling electric heater tape, these controllers help reduce energy costs, prevent burst pipes, improve system reliability and support safe water temperature management where required.
Whether protecting external pipework, fire sprinkler systems or commercial hot water installations, the Envirostat range delivers reliable frost protection for a wide range of industrial and commercial applications.
Explore United Automation’s complete range of Envirostat Frost Protection Controllers to find the ideal solution for your frost protection and temperature maintenance requirements.
An Envirostat Frost Protection Controller automatically controls electric heater tape to prevent exposed pipes and water systems from freezing while minimising energy consumption.
It continuously monitors temperature using an external sensor. When temperatures approach freezing, the controller automatically energises the heater tape and switches it off once temperatures rise.
Selected models are designed to maintain appropriate water temperatures, helping support Legionella risk management strategies in commercial buildings.
Typical applications include commercial buildings, hospitals, hotels, schools, warehouses, industrial facilities, external pipework and water distribution systems.
United Automation offers models suitable for heater tape loads up to 4 kW and 6 kW at 230 V, making them suitable for a wide variety of commercial and industrial applications.
Whether you need our proven standard products or a custom control system, United Automation delivers robust and reliable engineering solutions tailored to your industry.
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