My old office was a converted sunroom. Beautiful windows, terrible insulation. I’d sit there with my fingers going numb, staring at two space heaters in the corner: a trusty fan-forced convection heater and a newer infrared panel. I decided to stop guessing and start testing. Which one actually wins the battle for a genuinely cold room? I spent a winter finding out.
For this deep dive, I needed a reliable, modern portable heater to act as a baseline. After some research, I settled on the DREO Space Heater. It’s a popular ceramic convection model that kept popping up in discussions about efficient room heating. Its digital thermostat and oscillation became a key part of my comparison.
My Experience Testing Both Heaters in a Cold Space
I used my old sunroom office as the lab. On a 40F (4C) morning, the room started at a brisk 52F (11C). My goal wasn’t just to feel warm at my desk, but to understand how each electric heater changed the environment. I tracked temperature in four corners and at my desk, noted how long it took to stop seeing my breath, and, crucially, monitored my energy usage meter.
The convection heater was the DREO. The infrared was a simple, no-frills panel heater. I tested them on separate, equally cold days. The differences weren’t subtle; they were fundamental. One fought the air, the other fought me.
How Convection and Infrared Heaters Actually Work
This is where most articles get technical and lose the plot. Let me break it down based on what I felt, not just what the specs say.
A convection heater works like a mini, turbocharged version of your home’s central heating. It uses an electric heating element (often ceramic for safety) to warm air directly. A fan then blows that warmed air into the room. It’s all about air movement and creating a current. Warm air rises, cold air sinks to be reheated, and a cycle begins. The room’s air itself becomes the warmth delivery system.
An infrared heater is completely different. It emits invisible infrared rays, a type of radiant heat. These rays travel through the air without heating it and instead warm solid objects they hit: you, your chair, the floor, the walls. It works exactly like sunshine on a cold daythe air can be chilly, but you feel warm in the beam.
Think of it this way: Convection heats the room. Infrared heats the objects and people in the room. This core distinction dictates everything about their performance.
Direct Comparison: Performance in a Chilly Room
Heres what happened in my real-world test. Ive summarized the stark contrasts in the table below.
| Aspect | Convection Heater (DREO) | Infrared Heater |
|---|---|---|
| Initial “Feel” of Warmth | Took 5-7 minutes. Warmth built gradually as air circulated. | Instant. Felt warmth the second I turned it on and sat in its path. |
| Warmth Distribution | Excellent. The oscillation fan created even, ambient heating. All corners warmed eventually. | Very localized. A cozy “spot heat” directly in front. My back, away from the beam, stayed cold. |
| Heating Efficiency in a Drafty Room | Struggled. Constantly fighting cold air infiltration. Felt like it was running non-stop. | Unaffected by drafts. The radiant heat hit me regardless of air movement. Felt efficient for me. |
| Noise Level | Audible fan noise. A consistent white sound. | Silent. No moving parts. |
| Impact on Room Humidity | Dried the air noticeably over a few hours. Classic “heater dryness.” | No noticeable change in humidity. The air itself wasn’t being cooked. |
The biggest surprise was the energy consumption. Over a 4-hour period on a cold day, the convection heater used more total energy. But it also raised the entire room’s temperature by 10F. The infrared used less energy, but only made me feel warm in my chair. For whole-room heating efficiency, convection won. For personal, immediate spot heating, infrared was the clear champion.
If your main issue is a room with persistent cold corners that never seem to warm up, a good oscillating convection heater is your best bet. Infrared won’t solve that.
Safety First: What I Learned About Heater Safety
This is non-negotiable, especially for overnight use or in bedrooms. Both types have different safety features and risks.
Modern convection heaters like the DREO are packed with safeguards:
- Tip-over switch (cuts power if knocked over)
- Overheat protection
- Cool-touch exteriors
- Thermostats that prevent constant max output
Their main hazard is the hot heating element and fan grill. You need space around them.
Infrared panels get very hot on the surfacethat’s how they work. While many have grills and overheat protection, the surface temperature itself is a burn risk for children or pets. Their silent operation can also make you forget they’re on. However, with no fan, they don’t stir up dust or allergens, which is a plus for air quality.
For a safe heater for bedrooms overnight, I’d lean towards a convection model with a precise thermostat and all the modern safety certifications. You can set it to a low, maintainable temperature without the surface being a burn hazard.
My Final Recommendation Based on Real Testing
So, which is better convection or infrared heater for a cold room? It depends entirely on your definition of “cold room” and your goal.
Choose a Convection Heater If:
- You want to raise the temperature of the entire room evenly.
- The space is moderately insulated, but just needs a boost.
- You need warmth to reach multiple people or different areas of the room.
- You value consistent, ambient heat and can tolerate some fan noise.
- You want the most efficient heater for unheated rooms that you occupy for long periods.
Brands like Dimplex and De’Longhi excel in this category with oil-filled radiators (silent convection) and advanced fan heaters.
Choose an Infrared Heater If:
- You are the only one who needs warmth (e.g., at a desk, in a chair).
- The room is very drafty, poorly insulated, or has high ceilings.
- You want instant, silent warmth with no waiting.
- You’re in a space temporarily and don’t care about heating empty air.
- You’re sensitive to dry air or fan noise.
The Cost Verdict: Cheapest to Run?
This is the cheapest to run convection or infrared question. Infrared typically uses less energy if you only need personal spot heating. But in my test, to achieve a similar level of whole-body comfort in a cold room for an extended time, I ended up running the infrared at a high setting constantly. The convection heater, once it reached the thermostat’s set temperature, cycled on and off, managing its energy consumption more effectively for the whole space.
For sustained, whole-room heating, a good convection heater with a thermostat is often more cost-effective. For quick, targeted blasts of heat, infrared can save pennies. Independent testing from sources like Which? UK’s electric heater reviews often confirms this nuanced view of running costs.
My sunroom office needed ambient, all-day warmth. The convection heater won that battle. It changed the environment. The infrared heater was my go-to for quick, one-person warming sessions at my desk before the room itself had warmed up. There’s no single “best” electric heateronly the best one for your specific cold room scenario. Define the problem first, then let the technology provide the solution.