Tools
The Mosart toolbox.
Free, accurate, built to standard. Calculators for the maths, quote generators to scope a job, figures checked by our accredited Passivhaus certifiers. Pick a tool to begin.
Calculators
Exact maths to a recognised standard. Build it up, get the number, sense-check it against the limit.
U-value calculator
Build a construction layer by layer and get its U-value.
Open the tool →Airtightness converter
Convert between air-change rate, permeability and leakage area.
Open the tool →Fabric heat-loss
Sum fabric heat loss across the envelope to size demand.
Open the tool →Treated floor area (TFA)
Apply the PHPP treated-floor-area rules room by room.
Open the tool →Condensation and dew-point
Check a build-up for surface and interstitial condensation risk.
Open the tool →Overheating quick-check
A fast first-pass overheating screen before dynamic simulation.
Open the tool →Quote generators
Scope a job and get an indicative fee in a minute, on real Mosart rates, then confirmed by a certifier.
Resources
Reference and benchmarks to lift straight into your work.
Need it done for you?