heating_system_size — heating_system

returns the kW heating system required to heat building (rounded up to nearest kW).

heating_system_size(
  annual_heating_requirement,
  hdd_annual = 2200,
  coldest_day = -7,
  operating_hours = 12,
  efficiency = 0.9
)

Arguments

annual_heating_requirement: estimated annual heating requirement based on BER and floor area
hdd_annual: annual Heating Degree Days at location
coldest_day: mean temperature expected on the coldest day (design temperature e.g -2C)
operating_hours: assumed max operating hours
efficiency: boiler efficiency

kW capacity