VISION4

VISION4 logo.

Models the combined optical and thermal performance of glazing systems and provides information on the energy flow and temperatures which result from imposed environmental conditions. VISION4 is part of the FRAMEplus Toolkit for the thermal analysis of windows, walls and doors. VISION4 can also calculate the velocity field within window glazing cavities to better predict condensation resistance. VISION4 simulations (when combined with FRAME) are an equal alternative to testing to determine the U-value, condensation resistance and solar heat gain coefficient of windows and doors. VISION4 was used to produce the window information in the ASHRAE Handbook of Fundamentals and is referenced in several national window standards.

Keywords

fenestration, solar optical characteristics, thermal performance, windows, glazing

Validation/Testing

N/A

Expertise Required

Basic-level understanding of heat transfer.

Users

Over a thousand users in 20 countries.

Audience

Window and glazing manufacturers, building designers and specifiers, analysts determining window ratings.

Input

Glazings, coatings and tints (entered manually or retrieved from a library of 600 products); interpane cavity spacing and fill gases (pure gases or mixtures); glazing tint angle; solar radiation intensity; environmental conditions (ASHRAE, CSA, or user-defined indoor temperature, film coefficient, outdoor temperature, wind speed, cloud cover).

Output

Solar-optical properties for any solar spectrum, U-values, solar heat gain coefficient, visible light transmission, solar transmission, graphs of glazing temperatures and spectral transmission, velocity field within the glazing cavity.

Computer Platform

PC-compatible, 386 or higher, running DOS or Windows.

Programming Language

C

Strengths

VISION4 is now part of the FRAMEplus computer toolkit. VISION4 files can be used as input for FRAMEplus in order to analyze total window performance. VISION4 files can be combined with FRAME4 to assess the potential for condensation. VISION4 graphs are very useful in identifying heat build-up due to solar radiation.

Weaknesses

Requires FRAME to determine total window properties.

Contact

Company:

Address:

650 Riverbend Drive
Kitchener, Ontario
Canada
Canada

Telephone:

(519) 743-8777

Facsimile:

(519) 743-8778

E-mail:

frame@enermodal.com

Website:

http://www.enermodal.com

Availability

VISION is part of the FRAMEplus Toolkit. The Toolkit sells for $295. US ($350. CDN).