Example of calculations of heating costs

260 cubic meters heated volume x 0,055 kW / cubic meter specific heat load x 8 hours x 30 days x l / kWh specific heat price of fuel = heating costs per month

Fuel Calorific value of fuel Efficiency of the system Real caloricity Fuel price Specific cost of heat Heating costs of 100 sq. m/month
Wood pellets 4200kcal/kg

 

90% 3780 kcal/kg

 

380,00BGN/t 0,09BGN/kWh 308.00 BGN
Natural gas 8000kcal/m3 88% 7040 kcal/m3 918,00BGN/м3 0,11BGN/kWh 377.50

BGN

Propane-butane 11950 kcal/kg 87% 10396 kcal/kg 1800,00BGN/t 0,15BGN/kWh 514.80

BGN

Electricity 860 kcal/kWh 98% 843 kcal/kWh 0,21BGN/kWh 0,21BGN/kWh 720.70

BGN

Boiler Fuel – Coal 9000 kcal/kg 60% 5400 kcal/kg 1400,00BGN/t 0,22BGN/kWh 755.00

BGN

Diesel fuel 8526 kcal/kg 86% 7332 kcal/kg 2080,00BGN/t 0,24BGN/kWh 823.70

BGN

 

* The values are averaged for the conditions on the territory of Bulgaria and specific heat load is calculated for   non-insulated buildings

* Prices are incl. VAT up to 30.04.2017