The 5 Cheapest Types of Electric Heater to Run… & Why.
- Type 1: Infrared Heaters.
- Type 2: Ceramic Heaters.
- Type 3: Oil-Filled Heaters.
- Type 4: Space Heaters.
- Type 5: Storage Heaters.
- Where to Place a Space Heater.
- Ways to Increase Space Heater Efficiency.
- How Long Can Space Heaters be Left On?
As a rule of thumb, you'll need roughly 10 watts of heating power for every square foot of floor area in the room. This means that a 1,500-watt heater can be the primary heat source for an area measuring up to 150 square feet.
When sizing an electric heater, a rule of thumb suggests the unit needs to consume 10 watts of power per square foot of room area being heated. Beside this, how many square feet will a 5kw heater heat? 5kw Heat Strips. 5kw heat strips for a 1200 sq ft house.
It's the obvious solution: When nature turns the thermostat down, it's time to turn up the heat on your bed. Just as with clothing, layers of bedding keep you warmer, so swap out those percale or sateen sheets for flannel, and top them with a warm blanket and a down-filled (or down-substitute) comforter or duvet.
On paper at least I think the boiler and rads are correctly sized but the heat-up time still seems rather slow. On average from a cold switch-on it takes about an hour to raise the temperature by 1 degree and around 45 minutes per degree after that.
Measuring the energy used to heat your homeA 'typical' home in a mild climate uses between 5,000 kWh and 30,000 kWh of energy a year for its heating.
Small room 12m2
| Heater type | Energy star rating | Annual energy cost |
|---|
| Gas room heater | 5 star – natural gas | $105 |
| 3 star – LPG | $265 |
| 5 star – LPG | $225 |
| Electric room reverse-cycle | 2 star | $120 |
The electric space heaters tested at Consumer Reports use 1,500 watts to fully power. Since you should never use a space heater while sleeping, it would cost $2.82 a day to use a space heater 16 hours a day, based on the national average electricity rate.
You should not leave your heater running overnight while you sleep. Leaving a heater on overnight or unattended not only creates a potential safety risk, but it can also dry out your skin and nasal passages.
Size and Ceiling Height
| Area To Be Cooled (square feet) | Capacity Needed (BTUs per hour) |
|---|
| 700 to 1,000 | 18,000 |
| 1,000 to 1,200 | 21,000 |
| 1,200 to 1,400 | 23,000 |
| 1,400 to 1,500 | 24,000 |
APPROXIMATE BTU OUTPUT NEEDED BY SQUARE FOOTAGE
| APPROXIMATE SQUARE FOOTAGE | Up to 200 | Up to 400 |
|---|
| RECOMMENDED INSULATION | 4,000 BTU | 8,000 BTU |
| MODERATE INSULATION | 6,000 BTU | 12,000 BTU |
| POOR INSULATION | 9,000 BTU | 18,000 BTU |
For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a 1,000 square foot room requires 18,000 BTUs. A simple formula to determine your heating needs is: (desired temperature change) x (cubic feet of space) x . 133 = BTUs needed per hour.
A 1,500 watt space heater puts out the same amount of heat and uses the same amount of energy regardless of whether the unit costs $40 or $400. All electric heaters have three basic functionalities: They generate 3.4 BTUs of heat for every one watt of electricity.
Quick Take: Best Heaters for Large Rooms
- Dr Infrared Heater Portable Space Heater 1500-Watt.
- Cadet Com-Pak Twin 4000W Large Room Electric Wall Heater.
- LifeSmart Large Room Infrared Quartz Fireplace.
For ease of calculation let's call it 20m². This means that if it is a living area you will need 2kw to heat it. If it is a bedroom; 1.5kw will probably be sufficient.
Oil-filled heaters are a viable option for patients with respiratory disorders, although they're about 10 times more expensive than the most basic rod heater. Oil-filled heaters have pipes filled with oil. The air doesn't dry out because it's passing over hot liquid oil to soak up heat.
What Size Electric Heater do I need?
| Room Size (Sq Ft with 8 foot ceiling) | Watts (Poor Insulation) | Watts (Fully Insulation) |
|---|
| 160 square feet | 2000 | 1250 |
| 180 square feet | 2250 | 1500 |
| 200 square feet | 2500 | 1500 |
| 220 square feet | 2750 | 1750 |
Fan HeatersThey're very energy efficient, and hence rather inexpensive if used for a short amount of time (one hour or so).
Reverse cycle split system air conditioners (A.K.A heat pumps) – the most energy efficient electric heater. 5 and 6 star reverse cycle units can be even cheaper to run than gas heaters, producing just one-fifth of the greenhouse gas emissions that a standard electric heater creates.
The 7 Cheapest Ways To Heat A Home
- Buy an energy-efficient space heater. Heating the whole house can be expensive and wasteful, especially if you only use a small portion of it.
- Buy a smart thermostat.
- Use credit cards to pay your utility bills.
- Sign up for budget billing.
- Insulate your attic.
- Invest in warm clothing.
- Consider installing solar panels.
A spokesperson for the Energy Helpline replies: Overall, for heating the same space, using an electric heater is more than twice as expensive as using central heating. In the case you describe, it sounds as though it's likely that it would be cheaper to use an electric heater.
A 24 kW boiler will use 24 kWh of energy per hour. According to Choose, the cost is approximately 3.8 pence per kWh, which means it would cost around 91 pence to run a 24 kW boiler for one hour. This will change depending on the cost of gas and the size and age of your boiler.
All the electricity used by an oil filled radiator is used to generate heat; namely by warming the oil inside. There is no electricity wasted. This makes the oil filled radiator one of the most energy efficient ways of heating any room. It is also surprisingly cheap to run!
Even if you're not running your space heater on full, the costs are going to be high. 600 watts: About $60 per month. 750 watts: About $75 per month. 900 watts: About $90 per month.
Most Energy Efficient Space Heater Reviews (Updated List)
- Lasko 6405 Designer Oscillating Heater.
- Duraflame Maxwell Electric Stove with Heater.
- DeLonghi Mica Panel Heater.
- Lasko 751320 Ceramic Tower Heater with Remote Control.
- Lifesmart 6 Element Infrared Heater.
Warm an area of up to 750 sq. ft. with the Fahrenheat 14 in.
Before choosing your heater, you need to determine the minimum power required for your application. V – Volume of area to be heated (Width x length x height) in m3. ΔT – Difference between the external temperature and the desired internal temperature (in°C).
A low wattage space heater is less than 1000 watts. There are many low wattage space heaters with wattage as low as 200 watts. They are personal heaters and provide gentle heat, whereas some units provide heat for small rooms or offices and are as low as 500 watts.
Electric baseboard heaters on average need 225 watts per foot. Multiply the heater length by 225 to estimate wattage. If your heater is 4 ½ feet long, multiply 4.5 by 225 to arrive at an estimated 1,012 watts.
