Thermal Modelling
Building energy and comfort modelling — from a full PHPP Passivhaus package to early-stage design feedback that shapes the fabric before it’s fixed.
Discuss your projectThe cheapest time to fix a building’s energy performance is before it’s drawn in detail. We model heat loss, gains and loads early enough to influence orientation, glazing ratios and fabric — then carry that through to a verification-ready PHPP package.
What we model
PHPP Passivhaus package modelling
A complete, verification-ready PHPP model: fabric, ventilation, thermal bridges, primary energy and the heating demand balance for Passivhaus / EnerPHit targets.
Heating & cooling loads
Peak and annual heating and cooling demand, calculated to size systems correctly rather than over-specifying plant.
Solar gains & shading studies
Window-by-window solar gain and overshading analysis to balance winter free-heat against summer overheating risk (supports Part O / TM59 thinking).
Early-stage design feedback
Fast, directional modelling during concept and RIBA Stage 2–3: test massing, glazing ratio and fabric options while changes are still cheap.
Methods & tools
We model and produce PHPP and dynamic simulation outputs. We are not an accredited SAP/EPC assessor — we supply the inputs your assessor or Passivhaus consultant uses, not the certificate.
PHPP
Passive House Planning Package methodology and Passivhaus / EnerPHit criteria.
CIBSE TM52 / TM59
Overheating assessment criteria for naturally ventilated and residential buildings.
EnergyPlus
Validated dynamic simulation engine for whole-building energy and comfort.
A PHPP package needs calculated junctions. See thermal bridging.
Model it before you build it
Bring us in early and we’ll shape the fabric, glazing and loads while the changes are still cheap.
Discuss your project