Insulated Bi-folding Window Doors

By Jon Frikken, Jongchul Song, Mark Barnhouse and Charles McIntyre.

Published by The International Journal of the Constructed Environment

Format Price
Article: Print $US10.00
Article: Electronic $US5.00

Window openings represent disproportionately large amounts of energy loss, due to low thermal resistance of glass. Implementing current window improvement methods would entail significant changes to the existing exterior wall structure. One method that can overcome this limitation is to use bi-folding window doors that incorporate thermal insulation. This paper presents the feasibility of using insulated bi-folding window doors in improving energy efficiency of existing buildings. Thermal pictures of prototype insulated bi-folding doors were acquired and analyzed, and a cost-benefit analysis was performed on a case study building. The results of analysis indicated that insulated bi-folding doors could improve energy efficiency of the case study building by nearly 20% while the up-front investment costs would be paid back in less than three years.

Keywords: Building Energy Efficiency, Window Improvements, Cost-benefit Analysis

The International Journal of the Constructed Environment, Volume 1, Issue 4, pp.133-146. Article: Print (Spiral Bound). Article: Electronic (PDF File; 4.649MB).

Jon Frikken

North Dakota State University, ND, USA

Former Graduate Student, Dept. of Construction Management and Engineering, North Dakota State Univ.

Dr. Jongchul Song

Assistant Professor, Department of Construction Management and Engineering, College of Engineering and Architecture, North Dakota State University, Fargo, ND, USA

Assistant Professor, Dept. of Construction Management and Engineering, North Dakota State Univ.

Mark Barnhouse

Associate Professor of Practice, Architecture & Landscape Architecture, North Dakota State University, Fargo, ND, USA

Associate Professor of Practice, Dept. of Architecture and Landscape Architecture, North Dakota State Univ.

Dr. Charles McIntyre

Associate Professor, Construction Management & Engineering, North Dakota State University, Fargo, ND, USA

Associate Professor, Dept. of Construction Management and Engineering, North Dakota State Univ.