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Finally after months of development and testing, our U value calculator app UValue is released on Apple iOS as well as Android and Windows Phone.
Below are a few screen grabs that show the key features:
• Scalable high resolution graphics for all phones and tablets
• Ability to enter your own materials, thicknesses and conductivities as opposed to searching in scrolling lists
• Calculates for floors, walls, roofs and ceilings and adjusts the interior and exterior thermal resistance values accordingly (in accordance with DIN EN 6946 Section 5, Chart 1.)
• Available on Android, iOS & Windows Phones
• Includes settings for underground wall, rain screen or warm/cold roof constructions
• Information/settings screen
• Ability to reset all values or delete individual lines
• Adheres to Passivhaus methodology of calculating U values (excluding thermal bridging – see below)
• Links to TeachPassiv.com and additional Passivhus resources, news & FACT SHEETS
• This version totally free of charge
Why did we create the app? I was looking for a simple U value app that gave the ability of quickly entering data, allowed a quick comparison between different constructions/insulation and supplemented the PHPP U value calculations (the app is not intended to replace PHPP). I found that the app didn’t exist and we (myself and my coding maestro son Conor) decided to fill the gap in the market.
The app is free of charge and is used as a marketing aid for TeachPassiv.com and the architecture and Passivhaus Design Practice Mark Stephens Architects
The app does not currently take account of thermal bridges, this is going to be addressed in a subsequent version.
If you find any bugs or inaccuracies in the app, please do not hesitate to contact us at firstname.lastname@example.org
You can read the Privacy Statement regarding the app HERE
The app is not supported or endorsed by the Passivhaus Institute, does not replace the U value calculations in PHPP and is for entertainment purposes only e&oe.
A big shout out to my sons own website who is a Games Coding Guru at GreenCheeseGames.com
This Fact Sheet (below) focusses on Airtightness and it’s relevance in PHPP
This Fact Sheet on ‘Hitting Primary Energy Requirements in PHPP’ was harder to write than that on Space Heating Demand as there’s a lot of variables concerning frequency of use and energy consumption figures; I have however tried to keep it to the single sheet (in line with all the other FACT SHEETS in the FACT SHEETS section and also to provide information for those new to Passivhaus as well as the more experienced practitioners (who I know read the blog and I welcome any corrections from these highly skilled readers). Link below to Fact Sheet No. 15:
This new Fact Sheet (also in FACT SHEETS section of website) gives a few methods of hitting (and bettering) the Passivhaus Space Heating Demand requirements. It focusses on alternative strategies that may not be obvious in addition to improving u-values, airtightness etc…
There will be additional Fact sheets covering other PHPP areas in due course, watch this space…