U-Value Calculator
Thermal transmittance (U-value) according to BS EN ISO 6946:2017

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Changes in this update v3.70:

The calculator has become multilingual
Languages available at the momemnt are English, French, Spanish, Italian & German.
Translations are from Google's Translate. We appologise for any errors.
If you would like to have your language added, please contact us.

Changes in update v3.60:

Improved database search and calculation retrival.
Ability to insert a layer between existing layers already in the form.
Improved usability accross a wider range of mobile devices.
Improved intergration with the Heat Loss Calculator.
More materials added and updated.

Changes in update v3.40:

Improved framed calculation handling.
Ability to share your calculations via email, making them available even for non-registered users.
Intergration with the Heat Loss Calculator enabled.
More materials added and updated.

Changes in update v3.30:

Minor bug fixes and improved error checking.
Improved Mobile Usablity. Improved compression for a smoother experience.
U-Value Calculation notifications added.
Available materials added and updated.

Changes in update v3.20:

Simple Dew Point analysis added.
Individual layer analysis to identify Dew Point location.
Ability to edit environment settings, Internal & External Temps, and Relative Humidity.
Environment settings are saved along with each individual calculation.
Graphical display of temperature gradients displayed on the construction image.

Changes in update v3.10:

New module to manage your projects and calculations.
Reload calculations for printing or editing as necessary.
Copy calculations to existing or new project.
Delete individual calculations or whole projects.
Share a summary of the calculation with colleages & friends via email.
Additional information and materials handling highlighting errors.
Ability to add 2 materials within a framed constrution or partial fill.
Enhanced detection of possible gaps / voids in the construction.
Automatic insertion of airspaces within voids.
Improved labeling of materials including depths of framed construction materials.

Changes in update v3.03:

Bug fixed. Unable to save your calculations even though materials had been entered.
Bug fixed. Saved calculations not being correctly identified as OK after loading.
Improved handling of calculations, grouping by reference.
The number of saved calculations is now displayed next to the Load Calculation icon.
Increased the number of calculations that can be saved to 16.

Changes in update v3.02:

Ability to save your projects so you can return and edit, re-print etc.
Improved handling of studding and other more complex u-value calculations.
A bigger range of materials grouped by element type to make them easier to find.
Updated Max U-Values defined by the use of the building and the type of construction.
Materials selection filtered by the type of element being calculated.
Image showing a cross sectional representation of the materials within the element.
Improvements to support more browsers and mobile devices.

Changes in update v2.00:

Printer friendly styles for black and white printing (use print preview to check)
Improved number handling to help stop errors in u value calculation
Hopefully a clearer layout with highlighted Max and corrected U-values
Edit functions should allow you to replace materials and delete items.
Information, print and fail/success icons to show when the total u value is below max u-value

Future updates:

• Ability to save your projects as an ebook, for sharing etc.
• New materials are being continually added as they become available.
• Ability for users to define and save prefered default settings.
• Ongoing support for new mobile devices.

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