Anti-reflection coating on a thermochromic glazing VO2 film has been studied by RF sputtering technique and it is proposed as a possible solution to enhance luminous solar transmittance of the glazing film. SiO2 anti-reflection coating raised the luminous transmittance of the thermochromic film significantly both at low and high temperatures. In addition, it was found that thermochromism was maintained in the AR coated thermochromic film. More importantly, the thermochromism of VO2 film showed greater distinctiveness after application of AR coating, while the transition temperature of the thermochromism, 70degreesC was not affected by the AR coating. (C) 2002 Published by Elsevier Science B.V.