Outdoor Heater Installation Advice
Outdoor Heater Installation Advice
A practical buyer’s guide to installing outdoor infrared heaters properly, including plug-in home patio heaters, wall-mounted and hanging models, weatherproof heaters for exposed areas, commercial terrace layouts, thermostat options and when a qualified electrician is required.
Outdoor heaters can be one of the simplest heating upgrades — or one of the most important to get right. Some systems are genuinely plug-in and ready to use, while others — especially higher-powered, hardwired or commercial infrared heaters — need a more planned electrical installation and more deliberate positioning.
This guide explains what you can safely set up yourself, when you need an electrician, how size and space affect heater choice, when a covering matters, which models can stay outside in the weather, and why controls and thermostats often make as much difference as the heater itself.
Which Outdoor Heater Type Should I Choose?
If you want a faster route to the right heater, start with the space rather than the brand. Outdoor heating works best when the heater type matches the exposure level, fixing options and how the space is actually used.
Small Home Patio
Usually best with a plug-in freestanding heater or one carefully placed wall-mounted model.
Covered Pergola
Often strongest with a covered-use infrared panel or mounted heater plus suitable thermostat control.
Exposed Terrace
Usually needs a weatherproof or shortwave heater that performs better against moving air.
Commercial Seating Area
Often needs multiple heaters, zoning and professional installation rather than one oversized unit.
Choose by space type, exposure, fixing point and controls first. That usually gets you to the right heater much faster than comparing product names in isolation.
Plug-In Outdoor Heaters for Domestic Use
Many outdoor infrared heaters — particularly freestanding patio heaters, some hanging heaters and selected home-use models — are designed for simpler installation. For a typical garden patio, seating corner or smaller domestic terrace, a plug-in heater can be the easiest route because you do not need to plan a full hardwired commercial installation.
- standard UK plug connection on compatible models
- no permanent hardwiring required
- ideal for patios, gardens and home seating areas
- easy to move or reposition if the layout changes
- good for buyers who want a practical heating upgrade without major installation work
If the heater comes with a plug, suits domestic output levels and is designed for home patio use, it is usually one of the easiest outdoor heating routes. That makes it especially attractive for gardens, smaller terraces and flexible home seating areas.
Plug-in options are usually strongest where you want a heater that can be added without permanent building work. They are particularly useful if your outdoor layout changes through the year or if you want to test heating in a patio area before committing to a fixed wall or ceiling-mounted setup.
When You Need an Electrician
Some outdoor heaters require a more permanent installation. This is especially true for hardwired wall-mounted heaters, ceiling-mounted heaters, hanging heaters, grouped heater layouts and higher wattage commercial systems.
- hardwired wall-mounted heaters
- ceiling-mounted infrared heaters
- hanging heaters fitted permanently to structures
- higher wattage systems, especially around 3kW and above
- multiple heater setups on one circuit or in one zone
- commercial terrace and hospitality layouts with grouped heaters
Any fixed electrical installation should comply with UK wiring regulations (BS 7671) and be completed by a qualified electrician. That is especially important in outdoor and commercial environments.
An electrician will normally:
- check circuit capacity properly
- install safe outdoor-rated connections
- confirm suitable isolation where required
- make sure the setup is protected correctly
- plan grouped loads and switching where multiple heaters are used
- help determine whether a relay or contactor is needed on larger commercial layouts
The heater may be the visible part of the project, but in larger outdoor layouts the real success often comes from the hidden parts — safe switching, correct positioning, sensible zoning and proper outdoor electrical design.
Thermostats, Remotes and Heater Controls Matter More Than People Think
Outdoor heaters are not all controlled in the same way. Some patio heaters are comparatively simple and use built-in switches, included remotes or stepped output levels. Others — especially covered outdoor infrared panels and more technical radiant systems — work best with or actually require an external thermostat or control system.
This matters because outdoor comfort is not just about whether the heater turns on. It is about whether the heat can be controlled sensibly for the space, usage pattern and exposure level. A covered pergola, enclosed terrace or semi-sheltered commercial patio may benefit from a thermostat-driven control route. A more exposed hospitality zone may suit grouped output control or remote switching instead.
Heaters Needing External Thermostats
The Herschel Select XLS range, often used in covered outdoor areas such as pergolas and sheltered terraces, includes models with a built-in SMART-R receiver but still needs a compatible thermostat to operate properly.
- Herschel T-MT — a mains-powered WiFi thermostat for hardwired setups
- Herschel T-PL — a plug-in WiFi thermostat for simpler plug-and-play control
- Herschel T-BT — a battery-powered non-WiFi option for straightforward manual control
These controls can manage more than one heater in a properly planned zone, which is especially useful in covered outdoor spaces where you want cleaner control over comfort and running time.
Heaters with Included Remotes or Built-In Output Control
Some patio heaters already include practical output control:
- Herschel Manhattan — supplied with remote control and multiple power settings plus timer functionality
- Herschel Florida — uses an integrated power switch with stepped heat settings
- Colorado — useful where variable power control and remote convenience matter
Flexel Outdoor Heating Control Thinking
Flexel infrared systems and ECOSUN ranges generally benefit from compatible external controls for the best performance, particularly in covered or semi-enclosed outdoor areas where air-sensing logic can help avoid unnecessary overheating.
- Flexel Touch WiFi for app-based scheduling and control
- V22 / V24 wireless systems where larger zoned layouts need stronger management
- third-party thermostats can often be used where they are suitable for a 230V AC resistive load
- high-output heaters such as ECOSUN S+ and ECOSUN TH are best managed with compatible air-sensing control logic
Some outdoor heaters are basically switch on and enjoy. Others are much happier when paired with the right thermostat, receiver or grouped control logic. Covered outdoor panels in particular often perform best when they are properly controlled rather than just manually switched.
Weatherproof Heaters vs Covered Outdoor Heaters
One of the biggest outdoor heating mistakes is assuming every heater suits every outdoor condition. Some heaters are designed for covered pergolas, canopies, enclosed terraces or sheltered patios. Others are specifically built to cope with more exposed outdoor conditions and can be used without needing a full overhead covering.
Covered Outdoor Areas
Covered outdoor heaters are often ideal for:
- pergolas
- canopies
- enclosed terraces
- sheltered patio roofs
- semi-enclosed hospitality seating zones
These spaces often suit infrared panels, hanging heaters and more design-led systems because the covering reduces weather exposure and helps the warmth feel more focused.
Weatherproof Outdoor Heaters for Exposed Use
If the area is more exposed, heater choice becomes more important. In those spaces, you usually want a model with a stronger weather-resistance rating and output suited to open-air performance.
| Heater / Range | Outdoor Suitability | Typical Use | Key Point |
|---|---|---|---|
| Herschel California | Very strong weather protection | Exposed domestic and commercial outdoor spaces | Useful where all-year outdoor resistance matters |
| Herschel Miami | Strong outdoor resistance | Home patios and external seating areas | A practical weather-resistant patio route |
| Herschel Colorado | Strong for exposed spaces | Domestic patios and commercial terraces | Good output plus remote-controlled flexibility |
| Herschel Manhattan | Commercial-grade outdoor route | Larger terraces, bars and hospitality layouts | Especially useful where stronger directional performance matters |
| Herschel Rio | Suitable for robust outdoor use | Designer domestic and commercial spaces | A more premium aesthetic outdoor route |
| Herschel Hawaii | Suitable for outdoor hanging use | Overhead heating in suitable exterior positions | Useful where wall space is limited |
| ECOSUN S+ | Useful for sheltered or draughtier commercial areas | Warehouses, workshops and covered outdoor hospitality | High-output commercial infrared thinking |
| ECOSUN TH | Useful in more demanding commercial conditions | Terraces, larger commercial zones and covered external areas | Good where high-output directional warmth matters |
| Tansun Sorrento | Strong for exposed outdoor use | Patios, terraces, gardens and commercial seating areas | Shortwave quartz heat is especially useful in windier conditions |
Ask two questions first: Is the heater going under a covering? and Does it need to survive more exposed weather conditions? That one decision often narrows the outdoor heater choice much faster than comparing dozens of products at random.
Shortwave Outdoor Heaters for Windier and More Exposed Spaces
For fully exposed outdoor spaces — especially where wind is a factor — shortwave infrared heaters are often the most effective option. These heaters provide instant, high-intensity heat that is less affected by air movement compared to longer wavelength systems.
The Tansun Sorrento range is a well-established option for both domestic and commercial outdoor heating. These are robust, weather-suitable quartz infrared heaters designed to warm people directly rather than trying to heat open air.
- weather-suitable construction for outdoor use
- ideal for patios, terraces, bars and restaurant seating
- wall-mounted or suspended installation options
- shortwave quartz infrared for strong, instant heat
- effective in exposed and windy environments
If your outdoor space is fully exposed with no covering, shortwave heaters like Tansun are often the most effective solution.
Tansun Sorrento heaters are typically wall-mounted or suspended and should be installed with appropriate clearances. Always follow manufacturer guidance and maintain safe distances from combustible materials.
Commercial Outdoor Heater Installation
Commercial outdoor heating — such as for pubs, restaurants, cafés, hotels and hospitality terraces — almost always requires a more planned installation. This is because commercial layouts usually involve larger spaces, more variable occupancy, more demanding heater positions and often multiple heaters working together.
Commercial outdoor installation is not just about whether the heater can be switched on. It is also about:
- how large the space is
- whether the space is covered or fully exposed
- whether there is a wall, ceiling, beam or structure to mount from
- how far the heaters are from the people they need to warm
- whether one heater is enough or whether several zones are needed
- how the heaters will be controlled and switched safely
If there is only a wall behind the seating area, then a wall-mounted heater may be the strongest route. If there is no suitable fixing point overhead, a freestanding higher-output patio heater may be better for a small terrace or home garden. If the terrace is larger or more exposed, then multiple mounted heaters often make more sense than relying on one oversized unit trying to do the work of four.
Commercial Outdoor Size and Space Matter
A small covered terrace for a few tables is very different from a large fully uncovered commercial patio. In more exposed areas, heater performance is affected by air movement, so the layout usually needs either higher output, more focused directional heaters, or more units.
For example, a larger fully exposed outdoor space around 20ft x 20ft will normally need more than one heater. In practical terms, that often means multiple higher-output units positioned to cover the seating area properly rather than expecting one heater to warm the whole space evenly.
For a bigger uncovered patio or terrace, professional installation and proper layout planning are strongly recommended. Large exposed spaces usually need multiple heaters, sensible mounting height and strong zoning to work well.
For more detailed terrace, pub and restaurant planning, see the Commercial Outdoor Heating Guide.
Outdoor Heater Positioning Tips
Installation is not just about wiring — placement is critical to both performance and running costs. Even a very good heater can disappoint if it is mounted too high, too far from the seating area, or pointed into open air rather than the occupied zone.
- aim heat towards people, not open air
- mount at the correct height for the heater type
- avoid very wind-exposed positions where possible
- focus on seating zones rather than the full perimeter of the space
- use multiple smaller or grouped heaters instead of one awkwardly placed unit
- check whether the heater is designed for wall mounting, ceiling mounting, hanging or freestanding use
Outdoor Positioning Basics
Wall, ceiling, hanging point or stand location should match the heater design and the seating layout.
Focus on chairs, tables and customer or family seating areas rather than empty open edges.
Too high can weaken comfort. Too low can create poor spread or practical clearance issues.
Covered terraces need different positioning logic from fully exposed open patios.
Outdoor heaters work best when they are directional and targeted. Trying to “heat the air” outdoors is usually where disappointment and wasted running costs start to creep in.
Size and Space Planning for Outdoor Heaters
Outdoor heater installation should always start with the space itself. A small balcony, a covered pergola, a domestic patio, a restaurant terrace and a large exposed courtyard all behave differently.
| Space Type | Usually Strongest Installation Route | Why |
|---|---|---|
| Small home patio | Plug-in freestanding or one well-placed wall heater | Simple to install and usually enough for a modest seating area |
| Covered pergola | Ceiling, hanging or covered-zone infrared heater with suitable control | The structure often allows better heat focus and cleaner installation |
| Wall-only terrace layout | Wall-mounted directional heater | Best where the wall is the practical fixing point behind the seating zone |
| Small commercial terrace | Stronger freestanding or wall-mounted commercial-capable heaters | Useful where flexibility and customer comfort both matter |
| Large uncovered terrace | Multiple high-output heaters with professional layout planning | Exposure and air movement usually demand more output and better zoning |
For larger uncovered outdoor spaces, it is often much better to think in coverage zones than in simple room-style square footage. That is why an Outdoor Heater Size & Heat Coverage Guide is such a useful companion page to this one.
Outdoor Heater Safety Rules
- only use heaters rated for the intended outdoor conditions
- keep safe clearance from ceilings, walls and combustible materials
- check whether the heater is for covered use or exposed outdoor use
- make sure brackets, beams or structures are suitable for the heater weight
- do not cover the heater
- keep fittings stable, level and correctly mounted
- for fixed installations, use a qualified electrician
Outdoor heaters are safe when installed correctly — most problems come from poor placement, using the wrong type of heater for the weather conditions, or incorrect electrical installation.
Popular Outdoor Heaters to Consider
FAQ’s
Can I install an outdoor heater myself?
Yes, many plug-in patio heaters are designed for simple DIY installation. Always check whether the heater is genuinely designed for plug-in use and for the level of outdoor exposure in your space.
Do outdoor heaters need an electrician?
Hardwired heaters, grouped heater layouts and higher-power installations usually need a qualified electrician to ensure the setup is safe and suitable for the load and environment.
Do all outdoor heaters need a roof or covering?
No. Some heaters are suitable for more exposed outdoor use, while others are better under pergolas, canopies or sheltered terraces. The heater type and weather protection level matter.
Do outdoor heaters need a thermostat?
Not always, but many covered outdoor infrared systems perform much better with proper controls. Some compatible infrared ranges, including certain Select XLS setups, need an external thermostat to operate properly.
What is the best heater if I only have a wall behind the seating area?
A wall-mounted heater is often the strongest route if there is a suitable fixing position behind or near the seating zone. If wall mounting is not practical, a stronger freestanding patio heater may be a better fit for smaller spaces.
What is the best outdoor heater for a small commercial terrace?
That depends on whether the terrace is covered, how exposed it is and whether you can wall-mount the heater. Smaller commercial terraces often suit stronger wall-mounted or freestanding commercial-capable outdoor heaters with sensible zoning.
Can one thermostat control more than one outdoor heater?
Yes, in the right setup. Compatible thermostats can often control multiple heaters in one zone, provided the electrical load is planned correctly and the control route suits the heater range.
Are weatherproof outdoor heaters better than covered-use heaters?
Not automatically — they are simply designed for a different situation. Covered-use heaters can be excellent in pergolas or sheltered terraces, while weatherproof heaters are stronger for more exposed outdoor positions.
Are Tansun Sorrento heaters suitable for outdoor use?
Yes. Tansun Sorrento heaters are designed for outdoor use and are especially useful where shortwave infrared is needed for exposed patios, terraces and commercial seating areas.
What is the difference between ECOSUN TH and ECOSUN S plus?
Both are high-output Flexel commercial heater routes, but ECOSUN S+ is particularly strong for larger draughty commercial and covered outdoor spaces, while ECOSUN TH is often chosen where a robust directional high-output heater is needed in demanding environments.
Ready to Choose the Right Outdoor Heater Setup?
Start with the outdoor space itself. Work out whether the area is covered or exposed, whether the heater will be plug-in or hardwired, whether you need simple remote control or a proper thermostat route, and whether one heater is enough or the space really needs zoning.
The best outdoor heating result usually comes from matching heater type, weather suitability, fixing position, controls and space size properly from the start — not from picking the first heater that looks good in a product grid and hoping for the best.