ThermApp is a web application for analyzing the thermal performance of building assemblies. The current page identifies it as THERM App v0.0.1. It is mainly aimed at contractors, engineers, architects, and students, helping them build custom envelope layer assemblies and analyze how materials, thicknesses, air cavities, and layer order affect thermal resistance R-values, heat transfer coefficient U-values, and temperature gradients.
Based on the captured content, ThermApp centers on assembly layer modeling and calculation. Users can define the thickness and thermal conductivity of material layers and reorder them via drag and drop. The system supports unventilated air cavities up to 300mm and can calculate total U/R values, individual layer R-values, and optional surface resistances. The example page shows layers such as Render, Brickwork, Air Cavity, Insulation, and Plaster, along with their thermal resistance and internal/external surface temperatures. The temperature chart allows users to set indoor and outdoor temperatures and inspect the temperature gradient within the assembly, which can help identify potential condensation risks.
The application supports CSV import and export: created assemblies can be exported for project documentation or use in other software, and CSV files can be imported back into the app for continued visualization and editing. History is stored locally, and users can name, reload, and export assemblies. In terms of integration, the only visible option at present is CSV as a general data exchange format; no API, SDK, plugins, or third-party platform connections are disclosed. For documentation, the page includes About, Theory, and feature descriptions, but the content reads more like a product overview. There is no full calculation standard, boundary-condition documentation, validation method, or detailed tutorial visible.
The captured text does not mention pricing, accounts, subscriptions, or payment methods, nor does it state whether the product is open source or supports self-hosting or offline deployment. As a result, its business model and long-term availability cannot be determined. The version number v0.0.1 suggests the product may still be at an early stage, so teams considering it for commercial projects should first confirm its maintenance plan, calculation basis, and data storage approach.
Its strengths are a focused feature set and intuitive interaction, making it suitable for quickly comparing different building assembly options and creating calculation records via CSV. Its weaknesses are incomplete product information and a lack of details on APIs, permissions, collaboration, compliance, and support. It is better suited to students, individual engineers, or small projects for preliminary thermal analysis and teaching demonstrations. For formal engineering deliverables, results should be cross-checked against local codes and professional software.
The page text does not provide enough information to assess access quality, network stability, or payment availability from mainland China, so china_access is marked as unknown. If access proves unstable, alternatives could include local spreadsheet templates, building energy-efficiency calculation software, or professional thermal analysis tools that support Chinese standards.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on thermalperformance.app official site.
thermalperformance.app is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach thermalperformance.app directly.