EN 1020:1997 Non-Domestic Gas-Fired Forced Convection Air Heaters for Space Heating Not Exceeding a Net Heat Input of 300 kW@ Incorporating a Fan to Assist Transportation of Combustion Air and/or Combustion Products (Incorporates Amendment A1: 2001)
2009EN 1020:2009 Non-domestic forced convection gas-fired air heaters for space heating not exceeding a net heat input of 300 kW incorporating a fan to assist transportation of combustion air or combustion products
1999EN 1020:1997/PRA1:1999 AMD A1 Non-Domestic Gas-Fired Forced Convection Air Heaters for Space Heating Not Exceeding a Net Heat Input of 300 kW, Incorporating a Fan to Assist Transportation of Combustion Air and/or Combustion Products
1997EN 1020:1997 Non-Domestic Gas-Fired Forced Convection Air Heaters for Space Heating Not Exceeding a Net Heat Input of 300 kW@ Incorporating a Fan to Assist Transportation of Combustion Air and/or Combustion Products (Incorporates Amendment A1: 2001)