INSIGHTS & GUIDES
Built-In Thermostat vs Non-Thermostat Infrared Heaters: Which Should You Choose?
When choosing an infrared heater, one of the most important decisions is whether to buy a heater with its own built-in thermostat or a non-thermostat heater controlled by a separate external thermostat.
The heaters may look similar and provide the same type of infrared warmth, but the way you control them – particularly when several heaters are installed together – can be very different.
This becomes especially important in larger applications such as warehouses, churches, halls and workshops, as well as residential spaces such as conservatories and open-plan kitchens.
If you're first deciding whether thermostatic control is required at all, read our Do Infrared Heaters Need a Thermostat? guide first. This article then explains which type of thermostat arrangement may suit the installation.
Quick Answer
Built-In Thermostat or Non-Thermostat Infrared Heater?
Choose a non-thermostat heater with an external thermostat when you want several heaters to operate together as one heating zone. This is often the cleaner control strategy for a large room, warehouse, church, hall or other space where the heaters should follow the same temperature and schedule.
Choose a built-in thermostat heater when you want each heater to have its own individual temperature control. This is particularly useful for single-heater installations or spaces divided into separately used heating zones.
Neither option is automatically better. The right choice depends primarily on how many heaters you have and whether you want them controlled together or independently.
Control Several Heaters Together
Non-Thermostat + External Thermostat
Usually the more practical control arrangement when multiple heaters serve the same space.
- Multiple heaters operate as one zone
- One central temperature setting
- One schedule for the complete zone
- Centralised day-to-day control
- Well suited to large shared spaces
Control Heaters Individually
Built-In Thermostat
Usually the more flexible option where heaters need to operate independently.
- Each heater has individual control
- Different temperature settings possible
- Different operating schedules possible
- Useful for separate occupancy zones
- No separate room thermostat required for each heater
The Main Difference Is How the Heaters Are Controlled
The easiest way to understand the choice is to stop thinking about the heater itself for a moment and think about the heating zone.
Imagine a warehouse requiring six infrared bar heaters.
If all six heaters are intended to heat the same area to the same temperature at the same times, it may make little sense to control all six independently.
A central external thermostat can instead control the heating zone together.
Now imagine a workshop with three separate work areas that are occupied at different times. In that situation, individual built-in thermostat heaters may provide greater flexibility because each heater can be operated according to the requirements of its own area.
The number of heaters required is a separate design decision from how they are controlled. If you're still planning the system itself, see How Many Infrared Panels Do I Need?
Built-In Thermostat vs External Thermostat: Quick Comparison
| Feature | Non-Thermostat + External Thermostat | Built-In Thermostat |
|---|---|---|
| Control method | External thermostat controls the heating zone | Thermostat integrated into each heater |
| Multiple heaters | Can be controlled together as one zone | Each heater is controlled individually |
| Temperature setting | Shared across the zone | Can differ from heater to heater |
| Scheduling | One schedule can control the complete zone | Individual heater schedules can be used |
| Best suited to | Large rooms and groups of heaters operating together | Single heaters and independently controlled areas |
| External thermostat | Required for thermostatic temperature control | Not required for the heater's built-in control |
| Wi-Fi control | Available through a compatible smart external thermostat such as Netmostat | Available on compatible RADI8 built-in thermostat Wi-Fi models |
How Non-Thermostat Infrared Heaters Work with an External Thermostat
Centralised System
One Heating Zone
Non-thermostat heaters can be appropriately wired into an external thermostat system so that the heaters serving the zone respond to the same control.
The Netmostat Smart Thermostat, for example, provides smart temperature and scheduling control for compatible infrared heating installations.
Typical Application
Several Heaters, One Requirement
This arrangement makes sense where several heaters are serving one open area and you want them to operate according to a common temperature setting and schedule.
Rather than managing every heater separately, the heating zone can be controlled centrally.
Important Electrical Point
The Netmostat has a maximum direct switching load of 16A / 3680W. Where the combined heater load exceeds this, an appropriately rated contactor can be used so the thermostat controls the contactor rather than carrying the full heater load directly. The contactor, protection, wiring and complete installation should be correctly specified and installed by a qualified electrician.
How Built-In Thermostat Infrared Heaters Work
A built-in thermostat model places the temperature control within the heater itself.
On compatible RADI8 infrared bar heaters, the built-in thermostat models also provide Wi-Fi and remote control, allowing each heater to be managed independently.
The important word here is independently.
If four built-in thermostat heaters are installed in different areas, each heater can have its own temperature requirement and operating pattern rather than all four necessarily responding as one heating zone.
That can be extremely useful where occupancy varies across the space.
Which System Works Best in Different Spaces?
Warehouses & Large Halls
Central Control Often Makes Sense
Where several heaters serve one large occupied zone, non-thermostat heaters connected to a central control system can simplify operation.
Workshops & Zoned Areas
Individual Control Can Help
Where separate workstations or areas are occupied at different times, built-in thermostat models provide greater individual flexibility.
Homes & Smaller Rooms
Simple Individual Control
A built-in thermostat can be convenient where one heater serves one room and independent temperature control is preferred.
Warehouses
In a warehouse using several infrared heaters to serve the same working area, centralised control can make day-to-day management considerably simpler.
Staff do not need to manage each heater independently, and a common schedule and temperature can be applied to the zone.
See our dedicated warehouse heating solutions.
Churches and Large Halls
Churches and large halls often use multiple heaters and have defined occupancy periods such as services, events or community activities.
Where heaters are intended to operate together, centralised thermostatic control can make scheduling and operation easier.
Explore our church heating solutions.
Conservatories and Open-Plan Living Spaces
In a conservatory or smaller residential area, a built-in thermostat model may offer the simpler solution because the heater can manage its own temperature without requiring a separate thermostat for that individual heater.
See our infrared heating for conservatories guide.
Whole-House Infrared Heating
In a whole-house installation, the control strategy should be planned room by room. Separate rooms generally have different occupancy patterns and temperature requirements, so they should not simply be treated as one large heating zone.
Our Can Infrared Heating Heat a Whole House? guide explains how room-by-room sizing, heater positioning and control zones come together when infrared is being considered as the primary heating system.
Which Option Uses Less Electricity?
A built-in thermostat heater is not automatically more efficient than the equivalent non-thermostat heater, and an external thermostat does not automatically make a heater cheaper to run.
The electrical consumption of the heating system depends on factors including:
- Total installed heater wattage
- How long the heaters operate
- Target temperature
- Building heat loss
- How the heating is zoned
- Occupancy and schedules
The advantage of choosing the right control method is that it allows the heating system to respond more appropriately to how the space is actually used.
In one large shared area, central control may prevent unnecessary individual adjustment and simplify scheduling. In a genuinely zoned space, individual control can allow heaters in unused areas to remain off.
So the objective is not to choose the thermostat type that sounds most efficient. It is to choose the control strategy that best matches the building.
Control should also be considered separately from sizing. If you're still establishing the required heating output, read What Size Infrared Heater Do I Need?
Which Is Easier to Manage Day to Day?
This depends mainly on the number of heaters.
With one or two heaters, individual built-in controls are straightforward.
With a much larger installation, independently managing every heater can become less convenient. A central thermostat allows the heaters within that zone to follow one common control strategy.
This is particularly useful in shared commercial buildings where several members of staff may otherwise adjust individual heaters.
What About Installation?
Built-In Thermostat Models
Built-in thermostat models do not require a separate external thermostat for their normal thermostatic control. This can simplify the control arrangement for individual heaters.
Electrical installation requirements still depend on the particular heater and its wattage, so the installation instructions for the specific model must always be followed.
Non-Thermostat Models
Where a non-thermostat infrared heater is being controlled by an external thermostat, the heater needs to be appropriately wired into the thermostat/control system and electrical supply.
We recommend that permanent installations and external thermostat systems are installed by a qualified electrician.
For more information on mounting, positioning, electrical requirements and control planning, see our Infrared Heater Installation Guide.
3kW Bar Heater Installation
RADI8 3000W infrared bar heaters are not designed for connection using a standard UK 13A plug. They must be professionally hardwired to a suitable 16A fused spur by a qualified electrician.
So Which Infrared Heater Should You Choose?
Ask yourself one simple question:
Do I want these heaters to operate together, or do I want to control them individually?
Choose This When...
Non-Thermostat + Netmostat
- You have multiple heaters serving the same zone
- You want one temperature across the area
- You want centralised scheduling
- You want straightforward building-wide operation
- The system is being professionally wired as a permanent installation
Choose This When...
Built-In Thermostat
- You want each heater controlled separately
- You have a single-heater installation
- Different areas are occupied at different times
- You want different temperature settings between heaters
- Individual control is more useful than one central zone
Compare RADI8 Infrared Bar Heater Options
Central Thermostat Control
Non-Thermostat Infrared Bar Heaters
Choose these models where you intend to use a suitable external thermostat/control system.
- 1200W Non-Thermostat Infrared Bar Heater
- 1800W Non-Thermostat Infrared Bar Heater
- 2400W Non-Thermostat Infrared Bar Heater
- 3000W Non-Thermostat Infrared Bar Heater
External control:
Smart Thermostat – Netmostat
Individual Heater Control
Built-In Thermostat Infrared Bar Heaters
Choose these models where you want individual thermostat, Wi-Fi and remote control at each heater.
Frequently Asked Questions
What is the difference between a built-in thermostat and a non-thermostat infrared heater?
A built-in thermostat heater controls its own temperature individually. A non-thermostat heater relies on a separate external thermostat where thermostatic control is required, allowing multiple heaters to be configured as part of the same heating zone.
Can several infrared heaters use one thermostat?
Yes, a correctly designed external control system can control multiple non-thermostat heaters as one zone. The total electrical load and control arrangement must be correctly specified. The Netmostat has a maximum direct switching load of 16A / 3680W; higher combined loads can be controlled using an appropriately rated contactor.
Do built-in thermostat infrared heaters have Wi-Fi?
The compatible RADI8 built-in thermostat infrared bar heaters linked in this guide include Wi-Fi and remote control, allowing each heater to be managed individually.
Can non-thermostat infrared heaters have Wi-Fi control?
Yes. Smart control can be provided through a compatible external Wi-Fi thermostat such as the Netmostat. In this arrangement, the smart control belongs to the external heating control system rather than being built into each heater.
Which option is better for a warehouse?
Where several heaters are serving the same warehouse heating zone and are intended to follow the same temperature and schedule, non-thermostat heaters with central thermostatic control can provide a simpler control arrangement. Where separate areas need genuinely independent heating, individual or multiple zones may be more appropriate.
Which option is better for one room?
For a single heater serving one room, a built-in thermostat model can be a convenient solution because thermostatic control is already integrated into the heater. An external thermostat system can still be used where that control arrangement is preferred.
Are built-in thermostat heaters cheaper to run?
Not inherently. Running cost depends on heater wattage, operating time, target temperature, building heat loss and how effectively the system is controlled. The main reason to choose between the two options is the type of control and zoning required.
Do infrared heaters need a thermostat?
For normal thermostatically controlled room heating, a suitable thermostat allows the system to respond to room temperature rather than simply remaining switched on continuously. The control may be built into the heater or provided by a compatible external thermostat. See our complete infrared thermostat guide for more detail.
Still Deciding?
Tell Us How Many Heaters You Need and How the Space Is Used
If you're unsure whether to choose built-in thermostat heaters or standard heaters with central control, we can help you decide based on the size, layout and usage of your space.
- Need central smart control? View the Netmostat Smart Thermostat.
- Heating a warehouse? Explore our warehouse heating solutions.
- Heating a church? Explore our church heating solutions.
- Need help choosing? Speak to one of our infrared heating specialists.
Built-In or External Thermostat: The Bottom Line
The choice between built-in thermostat and non-thermostat infrared heaters is primarily a choice between individual control and centralised control.
If several heaters are serving one large area and should operate together, non-thermostat heaters connected to a suitable external control system can provide a clean and manageable solution.
If heaters need to operate independently – because different areas have different temperatures, schedules or occupancy patterns – built-in thermostat models provide greater individual flexibility.
Neither approach is universally better. Choose the system around the way the building will actually be heated and controlled.
If you want to understand the role of thermostatic control before choosing between these two arrangements, continue with our Do Infrared Heaters Need a Thermostat? guide.
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