--- title: Sustainable Thermal Transmittance Solutions with UVAL Wireless description: Discover our UVAL Wireless system for precise U-Value assessments in energy-efficient buildings. Meet UK regulations with accurate thermal efficiency data for smarter upgrades. --- [![Building\_Logo\_Revision\_Black](https://info.greenteg.com/hs-fs/hubfs/Building_Logo_Revision_Black.png?width=120&height=34&name=Building_Logo_Revision_Black.png "Building_Logo_Revision_Black")](https://info.greenteg.com/building?hsLang=en) [Learn More](https://info.greenteg.com/building?hsLang=en) # Building a Sustainable Future Know more about our thermal transmittance solutions for smarter, energy-efficient buildings ##### Accurate U-value assessments empower informed decisions on renovation Our calibrated, plug-and-play UVAL Wireless system provide reliable data for clear thermal efficiency evaluations. It offers accurate, non-invasive assessments of thermal transmittance in various building envelopes, including walls, roofs, floors, and windows.   Download Product Sheet ![56 ratio](https://info.greenteg.com/hs-fs/hubfs/56%20ratio.png?width=1200&height=1440&name=56%20ratio.png "56 ratio") THE CHALLENGE ##### Stricter Legislations on Building Energy Ratings in the UK With UK legislation requiring all commercial properties to achieve a minimum EPC rating of B by 2030, property owners are under increasing pressure to comply. According to the 2022 data from the Department for Levelling Up, Housing and Communities, 70% of office spaces in London currently have an EPC rating below B. ![Rated F&G](https://info.greenteg.com/hs-fs/hubfs/Rated%20F%26G.png?width=195&height=158&name=Rated%20F%26G.png "Rated F&G") #### 2023 All commercial buildings are required to achieve a minimum EPC E-Rating to be lawfully let ![Rated D,E,F&G](https://info.greenteg.com/hs-fs/hubfs/Rated%20D%2cE%2cF%26G.png?width=198&height=161&name=Rated%20D%2cE%2cF%26G.png "Rated D,E,F&G") #### 2027 All commercial buildings are required to achieve a minimum EPC C-Rating to be lawfully let ![Rated D,E,F&G](https://info.greenteg.com/hs-fs/hubfs/Rated%20D%2cE%2cF%26G.png?width=198&height=161&name=Rated%20D%2cE%2cF%26G.png "Rated D,E,F&G") #### 2030 All commercial buildings are required to achieve a minimum EPC B-Rating to be lawfully let Achieving a B rating or higher will require **significant upgrades** to building elements and heating systems. OUR SOLUTION ##### UVAL Wireless provides precise U-Value and R-Value measurements With our UVAL Wireless system, you can minimize unnecessary upgrades, accurately assess ROI, and make more cost-effective compliance investments. Our measurement kit provides remote, non-invasive, and accurate U-Value, R-Value, and Lambda-Value data for clear, time-efficient thermal efficiency evaluations.​ ![building - full kit 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20full%20kit%201x1.jpg?width=1200&length=1200&name=building%20-%20full%20kit%201x1.jpg) ![building - outernode 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20outernode%201x1.jpg?width=1200&length=1200&name=building%20-%20outernode%201x1.jpg) UVAL Wireless - Outer Node ![building - inner node 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20inner%20node%201x1.jpg?width=1200&length=1200&name=building%20-%20inner%20node%201x1.jpg) UVAL Wireless - Inner Node ![building - base station 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20base%20station%201x1.jpg?width=1200&length=1200&name=building%20-%20base%20station%201x1.jpg) UVAL Wireless - Base Station ![building - indoor set-up 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20indoor%20set-up%201x1.jpg?width=1200&length=1200&name=building%20-%20indoor%20set-up%201x1.jpg) UVAL Wireless - Indoor Set-up ![building - outdoor set-up 1x1](https://27184589.fs1.hubspotusercontent-eu1.net/hub/27184589/hubfs/building%20-%20outdoor%20set-up%201x1.jpg?width=1200&length=1200&name=building%20-%20outdoor%20set-up%201x1.jpg) UVAL Wireless - Outdoor Set-up ## Product Highlights ###### ISO-Conforming All devices are ISO-conforming, with ISO 9869 standard measurements ###### Swiss-Patented Our solutions, developed in Switzerland, are trusted by industries globally ###### Plug & Play Sensor calibration data preloaded onto logger for quick measurements ###### Reliable & Precise Our kits enable accurate thermal measurements and efficiency assessments ###### Remote UVAL Wireless is the world’s only modular, remote U-Value system ###### Non-Invasive Receive precise thermal measurements without the need for intrusive methods ### Product Details ###### Features greenteg's wireless  U-Value, R-Value, and Lambda-Value measurement solution - capable of scaling to 5 U-Value measurement points. - Accurate U-Value and R-Value Measurements - Wireless measurement set-up - Remote Measurement Access - Up to 5 Measurement Points at Once - Quick and Easy Installation - Measurement of Surface, Room and Outdoor Temperatures - ISO 9869 and ASTM 31046/C1155 verifying software **Remote Measurement Access** allows you to view your measurements **from anywhere in the world** - meaning you don't have to attend the measurement site itself.  **Disclaimer**: This product uses a sub-GHz Communication link at 868 MH. This product can therefore only be used in Europe, and most of Africa & the Middle East   ###### Inclusions **Device**: 1 Base Station 2 Nodes (may order more) 1 Inner Wall Heat Flux Sensor 1 Outer Wall Surface Sensor 2 Ambient Temperature Sensors **Accessories**: 2 Ambient Sensor Mounting Clips 1 Roll of Double-Sided Adhesive Tape 1 Bag of Double-Sided Adhesive Water Repellent Strips 1 Pair of Scissors **Instructions and Manual**: 1 Calibration sheet 1 Instruction manual Software will be provided via password-protected download link (compatible with Windows OS only). ###### Specifications **Article Number**: A-258663   **Measurements Computed/Obtained**: U-Value; R-Value; Heat Flux; Surface Temperature; Ambient Temperature   **Heat Flux Resolution** \[W/M²\]: 0.09   **Temperature Accuracy** \[°C\]: +/- 0.1   **Min. Heat Flux Sensor Sensitivity (S) \[ΜV/(W/M²)\]**: 7.0 (sensor calibration data already loaded onto logger for simple and fast plug-and-play measurements)   **Data Storage Capacity \[# Measurements\]**: \>1'000'000   **Node Battery Lifetime \[Years\]:** 2   **Base Station Battery Lifetime \[Days\]**: 2   **Node Dimensions (Mm)**: 75 x 75 x 35 (excluding antenna)   **Base Station (Logger) Dimensions (Mm)**: 120 x 75 x 25 (excluding Antenna)   **Measurement Standards**: ISO 9869-1:2014, ASTM 31046 / ASTM C1155 ### Download Product Sheet Explore our comprehensive brochure for detailed insights into our products and services. You'll receive a download link shortly after submission. \- ### Have more questions? Looking for more information about the product or interested in a personalized quote? Fill out the form below, and we’ll get back to you as soon as possible. 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