Low-e win­dow film

Avail­able from: spe­cial­ist so­lar film com­pa­nies In­stal­la­tion: by pro­fes­sion­als

NZ Lifestyle Block - - FEATURE -

Low-e film (low-emis­siv­ity film) is a thin polyester film with a mi­cro-thin, trans­par­ent metal coat­ing. It is stuck di­rectly to the in­side of sin­gle-glazed win­dows to re­flect ra­di­ant heat, ei­ther from out­side or in­side, re­duc­ing the amount of en­ergy you need to heat or cool your home.

BRANZ re­search shows low-e win­dow film can re­duce heat loss through sin­gle glaz­ing by up to 25%. In com­par­i­son, dou­ble glaz­ing, sec­ondary glaz­ing and DIY win­dow in­su­la­tion kits can re­duce heat loss through glaz­ing by about 60%.

Low-e win­dow film on sin­gle glazed win­dows works best in houses that rarely ex­pe­ri­ence con­den­sa­tion on win­dows, ac­cord­ing to the BRANZ re­search. Like con­den­sa­tion on a bath­room mir­ror, the con­den­sa­tion on the low-e film means the glass sur­face is no longer re­flec­tive and if con­den­sa­tion is present, the low-e sur­face pro­vides very lit­tle ben­e­fit over nor­mal glass. Once the con­den­sa­tion has dried up, the per­for­mance of low-e win­dow film is re­stored.

Tack­ling damp at source and good ven­ti­la­tion and heat­ing prac­tices may help to re­duce the amount of con­den­sa­tion that forms when low-e win­dow film is fit­ted.

Newspapers in English

Newspapers from New Zealand

© PressReader. All rights reserved.