Infrared Heaters Operating Cost Calculator

## STEP 1:

Determine the size of your room. Measure the length and width – then multiply the two numbers to get the area (square footage). (To convert square footage to metres multiply by 0.0929234). Multiply square metres by height (average height is 2.5m) = m3 (cubic meters)

Eg.  Length – 15 feet
Width   – 12 feet
Height –    8 feet (2.5 metres)

Calc:      15ft x 12ft = 180 sq feet  = 17m2)

17m2 x 2.5m = 42 m3

## STEP 2:

Determine the Wattage rate required:

##### 20 watts per m3

– If boosting an existing heating system
– Replacing an existing heating system and the insulation of the room is of a high quality.

##### 25 – 30 Watts per m3

– If replacing an existing heating and there is moderate insulation.

##### 30 – 35+ Watts per m3

– If building is old or poor insulation

Multiply the Cubic Meters (m3) by the required Watts per m3

##### Calc:

42m3 by 25watts = 1050 Watts required

## STEP 3:

To determine the cost per day multiply the Wattage by the average usage per day (example, 8 hrs.). Divide this number by 1000 to get the Kilowatts/hr. Multiply this result by the current cost of electricity per kilowatt hour.

#### EXAMPLE:

• A typical living room may be 15 ft x 12 ft would be 180 sq ft ( = 17m2 )
• Standard ceiling height =8 ft (2.5m )
• Assume a moderate level of insulation
• 17m2 x 2.5m = 42m3 @25 watts per m3
Infrared Heating Output required = 1050 watts.
• 1050 watts x 8 hrs = 8400 W/hr
1050 W/hr/1000 = 8.4 kW/hr
8.4 kW/hr x €0.20 (avrg. cost of 1kW/hr) = €1.68 cents / day