Heating Controls

For Tenants, Homeowners, and Landlords in the United Kingdom

This page outlines the types of heating controls that can be installed in residential properties to improve energy efficiency, increase comfort, and reduce heating costs. The information is intended for tenants, homeowners, and landlords seeking to understand how modern heating control systems operate and how they can be integrated into energy efficiency programmes, including ECO4 (Energy Company Obligation).

Heating controls regulate how and when your heating system operates. When correctly installed and used, they ensure that energy is not wasted heating empty rooms or operating at unnecessarily high temperatures.

Types of Heating Controls

Heating control systems fall into several categories, each offering different levels of flexibility and savings potential. The appropriate system depends on your property’s heating type, existing infrastructure, and control requirements.

Room Thermostat

A room thermostat monitors air temperature in a central living area and switches the boiler on or off to maintain a set temperature.

System Overview:

• Usually mounted on a wall in a living room or hallway
• Works by comparing actual temperature to the desired setpoint
• When the temperature falls below the setpoint, the boiler activates

Suitability:
Standard in homes with central heating systems.

Installation Duration:
Typically under 1 hour.

Expected Lifespan:
10–15 years with periodic recalibration.

Programmable Thermostat

A programmable thermostat combines temperature control with timed operation. It allows users to schedule heating based on daily or weekly routines.

System Overview:

• Set temperature and on/off times for different periods of the day
• Many models offer separate schedules for weekdays and weekends
• Advanced models include load compensation and weather responsiveness

Suitability:
Ideal for households with consistent daily patterns.

Installation Duration:
1–2 hours.

Expected Lifespan:
10–15 years.

Thermostatic Radiator Valves (TRVs)

TRVs are fitted to individual radiators to control the heat output for each room independently.

System Overview:

• Adjust flow of hot water into the radiator based on local temperature
• Turned manually or digitally to regulate room-level comfort
• Help prevent overheating in rooms that retain more heat

Suitability:
Recommended in all rooms with individual radiators.

Installation Duration:
30–60 minutes per radiator.

Expected Lifespan:
10–20 years.

Programmer (Heating Timer)

A heating programmer sets specific times when the boiler should turn on and off, independent of temperature.

System Overview:

• Daily or weekly scheduling options
• Can control heating and hot water separately
• Often integrated with combi or system boilers

Suitability:
Useful in homes without consistent occupancy throughout the day.

Installation Duration:
1–2 hours.

Expected Lifespan:
10–12 years.

Smart Thermostat

A smart thermostat enables remote control of heating through mobile apps or voice-activated systems. Many models feature learning algorithms to adapt to user habits.

System Overview:

• Can be programmed and adjusted via smartphone or tablet
• Compatible with smart home ecosystems (e.g. Google Assistant, Alexa)
• Tracks usage and offers efficiency recommendations

Suitability:
Recommended for tech-enabled households and homes with variable schedules.

Installation Duration:
2–3 hours, often requiring a trained installer.

Expected Lifespan:
8–12 years depending on manufacturer updates and integrations.

Weather Compensation Controls

Weather compensation controls adjust the boiler’s output based on external temperatures, optimising energy use.

System Overview:

• An external sensor monitors outdoor temperatures
• The control unit adjusts boiler flow temperature accordingly
• Reduces boiler cycling and improves overall efficiency

Suitability:
Compatible with most condensing boilers, particularly in well-insulated homes.

Installation Duration:
2–4 hours depending on access to outdoor sensor placement.

Expected Lifespan:
15–20 years.

Load Compensation Controls

Load compensation controls monitor the difference between the room temperature and set temperature, then modulate the boiler output to maintain efficiency.

System Overview:

• Reduces boiler workload during partial heating demand

• Can be integrated with compatible modern boilers

• Offers smoother temperature regulation and lower fuel consumption

Suitability:
Highly effective when combined with condensing boilers.

Installation Duration:
1–2 hours.

Expected Lifespan:
10–15 years.

Compatibility with ECO4 Scheme

Heating controls can be included as part of a whole-house retrofit under the Energy Company Obligation (ECO4) scheme if:

• Installed alongside major fabric or heating upgrades
• Required under the PAS 2035 assessment process
• Delivered by a TrustMark-registered contractor

Controls such as TRVs and programmable thermostats are commonly integrated with insulation, boiler replacements, or first-time central heating.

Recommended Action Steps

To install or upgrade heating controls in your property:

1. Request a retrofit assessment to evaluate current heating control systems.
2. Determine eligibility for funding under ECO4 or other local schemes.
3. Contact a TrustMark-registered installer to discuss compliant heating control options.
4. Select controls appropriate to your system (e.g. smart thermostat for variable schedules, TRVs for room-by-room control).
5. Ensure compatibility with boiler type before installation.
6. Keep documentation for maintenance, warranty, and compliance verification.

Heating controls are a proven, cost-effective method to reduce energy consumption and improve comfort—especially when installed in combination with insulation and high-efficiency heating systems.