What Are Radiant Heaters?

Radiant heaters are electric heating units that emit infrared energy to warm occupants, furnishings, floors, and other surfaces in their coverage zone. Unlike fan heaters or baseboard heaters that mainly warm the surrounding air, radiant heaters are often selected for spot heating and directional comfort. This makes them useful in spaces where doors open frequently, ceilings are high, or air exchange is too high for conventional space heating to feel effective. In practice, they are commonly mounted on walls, ceilings, or structural members and aimed at occupied zones rather than trying to heat the entire air volume.

Where Are Radiant Heaters Used?

Typical applications include restaurant patios, condo balconies where permitted by design, covered terraces, reception areas, garages, workshops, shipping areas, service counters, warehouses with local workstations, and building entrances. They are also used in commercial and institutional settings where quiet heat is preferred and where gas piping or combustion appliances are not desirable. Outdoor and semi-outdoor use is common, but the actual suitability depends on the heater enclosure rating, mounting method, and exposure level. In fully open windy areas, even a properly sized radiant heater may provide less comfort than expected, so layout and shielding become important parts of the buying decision.

How To Choose Radiant Heaters

Start with the space, not the catalogue. First determine whether the heater is for indoor, covered outdoor, or more exposed outdoor use. Then review mounting height, available voltage, branch circuit size, and whether the goal is personal spot heat or broader area coverage. For patios and hospitality spaces, the usual questions are how many seats need coverage, whether the heaters can be centred over the occupied zone, and how much wind enters the area. For workshops and industrial spaces, buyers often focus on directional heat to benches, work cells, or operator stations. Also check whether the project needs simple on-off switching, staged control, dimming, timers, or integration with a building control system. A heater with the right output but the wrong mounting height or control package can still be the wrong choice.

Trade Rules Of Thumb

As a typical rule of thumb, radiant heating works best when aimed at people and occupied surfaces rather than empty circulation space. Covered areas with limited wind generally perform better than fully open exposures. Higher mounting heights usually require either higher wattage, tighter spacing, or more heaters to maintain comfort at occupant level. In patio layouts, several smaller heaters often provide more even coverage than one oversized unit placed too high or too far away. For open-edge canopies and breezy terraces, buyers commonly add capacity beyond what a sheltered area would need. These are practical estimating guidelines only, not design requirements. Final heater count, circuiting, and placement should be confirmed against manufacturer data, site conditions, and applicable electrical and building requirements.

Sizing Guidelines

Radiant heater sizing is usually based on coverage geometry rather than floor area alone. Typical inputs include mounting height, heater orientation, setback from the occupied zone, exposure to wind, and desired comfort level. As an approximate planning method, lower mounting heights and sheltered conditions can often use lower wattage per zone, while higher ceilings, edge exposure, and colder shoulder-season operation usually push the design toward more output or closer spacing. It is also common to size by seating bay, table grouping, workstation, or entrance zone rather than by total square footage. Electrically, confirm whether the project is 120V, 208V, 240V, 277V, or another available system voltage, and verify branch circuit loading, conductor sizing, overcurrent protection, and control compatibility. Any final sizing and installation should be reviewed by a qualified professional and aligned with the Canadian Electrical Code, local authority requirements, and the heater manufacturer's instructions.

Common Installation Practices

Common practice is to mount radiant heaters so the beam is directed at the occupied area with minimal obstruction from beams, fans, signage, or decorative elements. Ceiling and wall mounting are both used, depending on structure and coverage goals. Installers typically verify clearances to combustibles, mounting angle, weather exposure, and service access before rough-in. In commercial patio work, it is common to coordinate heater placement with lighting, sprinklers, speakers, and retractable screens early in the project to avoid conflicts. Controls may be grouped by zone so operators can energize only the occupied sections. For larger installations, staged control can help manage demand and improve comfort. Follow the listed mounting instructions and location rating for each heater model, and do not assume all radiant heaters are interchangeable for indoor, damp, or wet locations.

Common Mistakes

One common mistake is choosing heaters by wattage only and ignoring mounting height and beam coverage. Another is underestimating wind exposure on patios and semi-open spaces. Buyers also run into problems when voltage is assumed incorrectly, especially on commercial projects where 208V, 240V, and 277V options may all exist in the same building. Poor control planning is another issue: a heater may be electrically suitable but inconvenient if it cannot be zoned properly for occupancy patterns. Installers should also avoid placing heaters where decorative finishes, awnings, or structural members block the radiant path. Finally, do not treat radiant heaters as a direct substitute for whole-room heating in every application. They are often excellent for targeted comfort, but they are not always the right answer for fully enclosed spaces that need uniform ambient temperature.

Brand Comparisons

Eurofase and Infratech are both well-known names in electric radiant heating and are commonly considered for architectural and commercial projects. Infratech is often specified where buyers want a strong track record in fixed electric infrared heating, broad control options, and a polished fit for hospitality, residential outdoor living, and commercial patio applications. Eurofase is also commonly selected for design-conscious installations where appearance, finish options, and outdoor comfort heating are important. In many projects, the better choice comes down to available voltages, heater lengths, control compatibility, finish requirements, lead time, and how closely the coverage pattern matches the layout. If a site already uses one of these brands, staying with the same platform may simplify controls, appearance matching, and maintenance. For new work, either brand may be suitable for many standard applications when the heater rating and installation conditions align with the project.

Related Products

Radiant heater projects are often purchased with controls, timers, contactors, relays, wall switches, dimming interfaces where supported, mounting brackets, pole or ceiling mount accessories, weatherproof electrical boxes, disconnects, and appropriately rated cable and fittings. Depending on the installation, buyers may also need thermostatic or occupancy-based control components, though many outdoor comfort-heating applications rely more on manual or zoned switching than room-temperature control. For complete project planning, it is also worth reviewing panel capacity, overcurrent devices, and any required weather-resistant wiring methods for the installation environment.

Frequently Asked Questions

Are radiant heaters good for outdoor patios in Canada?

Yes, electric radiant heaters are commonly used for covered patios and semi-sheltered outdoor areas in Canada. Performance depends heavily on wind exposure, mounting height, and heater placement. A sheltered patio usually performs much better than a fully open area.

Do radiant heaters heat the air like unit heaters or baseboards?

No. Radiant heaters mainly warm people and surfaces in their line of sight. They can still contribute to perceived comfort in cool spaces, but they are generally chosen for directional heat rather than uniform whole-room air heating.

How do I know what voltage radiant heater I need?

Check the available supply at the site and match it to the heater nameplate and control equipment. Commercial projects may use 208V, 240V, or 277V, while some smaller installations may use 120V. Voltage should never be assumed from appearance alone.

Is one large heater better than several smaller heaters?

Not always. Several smaller heaters often provide more even coverage, especially over seating groups or long occupied zones. One larger heater may leave cold edges if the beam pattern does not match the layout.

Can radiant heaters be controlled in zones?

Yes. Zoning is common and often recommended for patios, commercial seating areas, and workstations. It allows operators to energize only the occupied sections and can improve both comfort and energy use.

What should I verify before ordering a radiant heater?

Confirm the application type, mounting height, location rating, voltage, wattage, branch circuit capacity, control method, finish requirements, and required clearances. For project work, also verify structural mounting conditions and coordination with other ceiling or wall-mounted systems.