Electric heating: from the toaster convector to thermal storage

Understanding the evolution of electric heating: from convectors to storage systems

Why the "toaster" convector shaped renovation jobs (and its limits on comfort)

The electric convector was the go-to renovation reflex for a long time. Its strength is fast installation and a low purchase price. But it mostly heats the air, which quickly rises to the ceiling. The result: cold feet, temperature that yo-yos, and a sensation of dryness when you push the output up.

Radiant panels, panel heaters, thermal storage: what really changes in terms of perceived heat

With a radiant heater or a radiant panel, a larger share of the heat is transmitted by direct radiation. The heat feels better, even at a slightly lower air temperature. Storage radiators add mass (cast iron, stone, fluid) that stores heat and then releases it gently. Comfort is more stable, but the temperature rise is less instant.

Points to watch in renovation: output, placement, controls

In renovation, size room by room based on insulation and usage. Also check the consumer unit, circuits and protections before adding heating. Position the emitter without obstructions (curtains, furniture) and take care with reliable controls: thermostat, scheduling and zoning. This is often where the real savings are made, just as much as with the appliance itself. To go further, see also the heating programmer and adapting the time slots.

Thermal comfort: how today's electric heating improves the feel

Dry or fluid thermal storage: what's the difference for comfort and everyday use?

A "dry" storage radiator stores heat in a solid material and releases it over a long time. The result is a gentle, stable heat. "Fluid" storage uses a heat-transfer fluid, giving even diffusion and a more gradual temperature rise. Day to day, both limit sudden swings and noise; the choice mostly depends on the rooms and your rhythm.

Room-by-room control: thermostat, scheduling, open-window detection

Comfort mostly comes from the controls. With a thermostat and per-room scheduling, you heat when needed, where needed. Some appliances handle the pilot wire or connected control. Open-window detection cuts the heating during airing, handy for avoiding heating the outdoors.

Limiting cold spots: air circulation, surfaces, thermal bridges

A good emitter helps, but it doesn't make cold surfaces disappear. Positioning (often under a window), clearance in front of the appliance, and air circulation all matter. If some areas stay cool, look at the insulation, airtightness and thermal bridges. That's where the real gains in perceived comfort are made.

Electric heating in 2026: where it still makes sense on your jobs

Small spaces, second homes, backup heating: cases where electric makes sense

Electric heating still makes sense when the use is occasional. A well-insulated studio, a small office, a guest room, a lightly occupied second home. You gain simplicity of installation, with no hydraulic network or storage needed. In these cases, well-controlled emitters (scheduling, absence detection) limit runaway bills.

Whole-house renovation: how insulation and ventilation change the picture

When the envelope is strengthened, needs go down. Heating becomes almost a fine adjustment. Insulation, airtightness, then suitable ventilation (mechanical ventilation) avoid damp and make electric heating more defensible, especially as backup. But if the building stays energy-hungry, direct electric heating quickly hurts both comfort and the DPE rating.

Comparing with the alternatives: heat pump, wood stove, boiler (depending on the building)

Before deciding, compare:

• Heat pump. Often the best efficiency. More frequent financial support. To frame the choice based on the home, see also choosing between an air-to-air and an air-to-water heat pump.
• Wood stove. Good for one living area, if the flue and air quality are manageable.
• Boiler. Best reserved for constrained cases, depending on the network and the project.

Sizing and installing electric heating correctly: simple methods to avoid callbacks

Quick calculation of needs: floor area, ceiling height, insulation level, climate zone

For a quick calculation, start from an output per m², then adjust for volume and climate. Common baseline in renovation, 2.50 m ceiling. 60 to 80 W/m² if the home is well insulated. 90 to 110 W/m² for average insulation. 120 W/m² and above for cold surfaces or high heat loss. If the ceiling height exceeds 2.50 m, work by volume, keeping the same logic for the gaps.

Choosing the right output per room: wet rooms, bedrooms, living spaces

Real comfort mostly comes from how the room is used. Allow more in wet rooms, often 100 to 130 W/m² to target 22 to 24°C. In bedrooms, 60 to 80 W/m² is often enough. In living spaces, aim more for 80 to 110 W/m², with a margin for large glazed bays or zone H1.

Installation and safety: protections, dedicated circuits, clearances, compliance

To limit callbacks, install to NF C 15-100. Plan for dedicated heating circuits, a 30 mA RCD, and a circuit-breaker rating consistent with the cable cross-section. Respect the clearances, avoid curtains and furniture pressed against the unit, and fix it to a suitable support. In a bathroom, respect the safety zones and the IP rating.

Optimising the bill without sacrificing comfort: settings and good practices to pass on to the customer

Setpoint temperatures: clear benchmarks by room and use

A good setting means a comfortable home without pushing the heating unnecessarily. Give simple benchmarks, then adjust for insulation, humidity and habits.

• Living spaces. Around 19°C.
• Bedrooms. Around 17°C at night.
• Bathroom. 22°C during use, lower the rest of the time.

Weekly scheduling and away scenarios: gaining comfort and efficiency

Scheduling does the work behind the scenes. Aim for a temperature rise just before occupancy, then a gentle drop at night and during the day. For long absences, keep an eco mode around 16 to 17°C rather than switching off completely.

Avoiding common mistakes: overheating, cut-offs, a bad sensor, poor scheduling

To avoid the yo-yo effect, look for stable settings and reliable measurements.

• Overheating followed by prolonged airing. A direct loss.
• Repeated complete shutdowns. Energy-hungry restarts.
• A sensor near a cold source or in direct sunlight. A skewed reading.
• Reversed schedules. Heating on when nobody's there.