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Dewhot energy saving heaters compared
June 2025

The best energy-saving heaters for 2025: Which one’s right for warming your Home?

As energy prices soar and power outages continue to disrupt everyday comfort, more South Africans are searching for energy-saving heaters that truly perform. Whether you’re warming a single room or large spaces, choosing the right heater can make a big difference to your comfort, monthly bill, and safety.
From electric panel and oil heaters to roll-about flame heaters and convection systems, this guide compares the most common home heating options and highlights the best heaters for energy savings, safety, and year-round performance.

Why Dewhot energy-efficient convection heaters lead the pack

Among all the heating systems available, Dewhot’s convection gas space heaters offer the best combination of reliability, speed, safety, and energy efficiency – making it the smartest long-term choice for South African homes.

Tired of high heating costs? Here’s what to look for…

Many heaters are cheap to buy but expensive to run, and end up costing you more in the long term by guzzling electricity that heats only confined areas. It’s not just about how much power a heater draws – it’s about how quickly it warms up your space, how evenly it distributes heat, and whether it’s capable of heating larger rooms with high ceilings or open layouts without wasting energy.

Key features of energy-efficient heaters

  • Ability to warm spaces quickly without drawing excess power
  • Use convection flow to distribute heat evenly and avoid cold zones or wasted energy
  • Models designed to match the size and volume of the space they are heating
  • Smart features like thermostats and timers to optimise energy use
  • What to consider when choosing a heater

Room size compatibility – A heater should be matched to the area it needs to warm. Oversized or undersized units can waste energy or underperform.

Energy efficiency – Choose energy-saving heaters that use less power to warm your space quickly and maintain a steady, comfortable temperature without constant energy drain.

Running costs – Don’t just compare price tags – look at how much energy the heater will use over time, especially during peak season.

Reliability during power outages – With power cuts continuing to affect many parts of South Africa, it’s worth choosing a heater that stays on even when the lights go out.

Safety features – Features like tip-over protection, automatic shut-off and sealed combustion heating technology rather than exposed flames add peace of mind, especially for families with children.

 

Heating Options Compared

Here’s a quick comparison of South Africa’s most common heater types, including electric convection, newer convection gas systems, and older roll-about flame heaters:

Dewhot convection
LPG gas heater

Energy usage

34W (ultra low use for fan)
0.29-0.48kg/hr to heat room quickly
0.14-0.18kg/hr to maintain warmth

Pros

Fast, even heating, sealed for safety, portable, fan runs off inverter or solar

Cons

Needs ventilation

Running costs

Low (LPG with thermostat control)

Best for

Large living spaces, daily reliable use

Roll-about
LPG gas heater

Energy usage

0.35–0.45 kg/hr

Pros

Portable, no installation needed

Cons

Burns oxygen, creates hotspots, safety hazard indoors

Running costs

Medium to high (LPG use)

Best for

Short-term use, aesthetic warmth

Electric
convection heater

Energy usage

~1500–2000W

Pros

Circulates warm air gently and evenly, silent operation

Cons

Slower to heat up, less effective in large open areas

Running costs

Moderate (depends on insulation)

Best for

Bedrooms, living areas with good insulation

Electric
fan heater

Energy usage

~2000W

Pros

Cheap to buy, fast warm-up

Cons

Noisy, dries air, limited reach

Running costs

Very high (short bursts of high electricity use)

Best for

Small rooms, quick blasts

Electric
oil heater

Energy usage

~1500–2500W

Pros

Quiet, retains heat longer

Cons

Slow start, bulky, power-hungry

Running costs

High

Best for

Bedrooms, extended use

Electric
infrared heater

Energy usage

~2000–3000W

Pros

Instant warmth to people/objects

Cons

Doesn’t heat air, ineffective for whole rooms

Running costs

High (draws a lot of power while in use)

Best for

Spot heating

Ready to upgrade your comfort with Dewhot’s energy-saving heaters?

Explore Dewhot’s convection gas heaters and experience the safest, most efficient way to heat your space.

Heaters
Warm large spaces efficiently with Dewhots energy saving heaters

Energy-saving heater FAQs

Yes. They consume a lot of electricity in short bursts and can quickly drive up power bills.

It’s possible, but noise and dry air can make them less suitable for sleeping areas.

They should not be left unattended. Choose models with overheat protection.

Yes, especially during extended use. However, they retain heat well, which may reduce overall runtime.

Generally yes, if the model has built-in safety features.

Around 15–30 minutes depending on room size and insulation.

Infrared heats surfaces directly; convection heats the air.

Yes, when installed correctly and with proper clearance from objects.

Because they operate at high wattage and don’t retain heat once turned off. Most models also lack smart settings like thermostats or timers, so they continue drawing power even when the room is already warm.

Only in well-ventilated areas and with strict safety precautions.

Yes, always. These heaters consume oxygen and release combustion gases.

Typically 20–40 hours depending on the heater size and setting.

They heat the air in the room and allow it to circulate naturally, providing consistent warmth.

In well-insulated spaces, yes. They’re quieter and distribute heat more evenly.

Absolutely. Poor insulation leads to heat loss and higher running costs.

Dewhot convection gas heaters have a sealed combustion chamber, meaning there’s no exposed flame and no combustion gases released into your living space. Additionally, a quiet internal fan distributes heat quickly and evenly throughout large spaces, and a built-in thermostat maintains your ideal temperature. This smart, fan-assisted, closed combustion and thermostat controlled system delivers fast, safe, energy-efficient heating – making it a safer and more efficient choice than traditional gas heaters.

A built-in fan heats the room quickly and evenly, reducing the time and energy needed to reach your desired temperature. Once warm, the thermostat maintains consistent heat using minimal gas. It also has a timer to switch off automatically, preventing unnecessary use.

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