Documentation
Policies, software guides, and Home Energy Model documentation for Vulcan Energy Modelling Software.
Regulatory guidance
General
Scheme
Software Documentation
Vulcan Software Documentation
Last updated: 8/2/2026
Getting started with Vulcan
Last updated: 8/2/2026
Setting up Vulcan Software
Last updated: 8/2/2026
Plans and Billing
Last updated: 8/2/2026
Geometry: Section Guide
Last updated: 8/2/2026
Fabric calculators: assemblies, thermal mass, ground floors, and unheated spaces
Last updated: 8/2/2026
Calculate: Section Guide
Last updated: 8/2/2026
Scenarios: Section Guide
Last updated: 8/2/2026
Results: Section Guide
Last updated: 3/26/2026
Vulcan MCP Server Guide
Last updated: 8/2/2026
Vulcan Analyst Guide
Last updated: 8/2/2026
HEM technical documentation
Home Energy Model core methodology (HEM-TP). Source: GOV.UK — Home Energy Model technical documentation.
HEM-TP-01: General summary of core calculation
Extracted: 4/17/2026
12 pages
HEM-TP-02: General summary of wrappers
Extracted: 4/17/2026
8 pages
HEM-TP-03: External conditions
Extracted: 4/17/2026
9 pages
HEM-TP-04: Space heating and cooling demand
Extracted: 4/17/2026
16 pages
HEM-TP-05: Fabric heat loss
Extracted: 4/17/2026
18 pages
HEM-TP-06: Infiltration and ventilation heat loss
Extracted: 4/17/2026
22 pages
HEM-TP-07: Thermal mass
Extracted: 4/17/2026
12 pages
HEM-TP-08: Solar gains and shading
Extracted: 4/17/2026
20 pages
HEM-TP-09: Energy for domestic hot water
Extracted: 4/17/2026
10 pages
HEM-TP-10: Ductwork and pipework losses
Extracted: 4/17/2026
14 pages
HEM-TP-11: Hot water storage tanks
Extracted: 4/17/2026
18 pages
HEM-TP-12: Heat pump methodology
Extracted: 4/17/2026
39 pages
HEM-TP-13: Storage heaters
Extracted: 4/17/2026
12 pages
HEM-TP-14: Boiler methodology
Extracted: 4/17/2026
21 pages
HEM-TP-15: Heat batteries
Extracted: 4/17/2026
22 pages
HEM-TP-16: Heat emitters
Extracted: 4/17/2026
19 pages
HEM-TP-17: Controls
Extracted: 4/17/2026
15 pages
HEM-TP-18: PV generation and self-consumption
Extracted: 4/17/2026
21 pages
HEM: Future Homes Standard assessment documentation
FHS assessment wrapper methodology (HEMFHS-TP). Source: GOV.UK — HEM: FHS assessment technical documentation. For Vulcan's consolidated summary of HEM:FHS timelines and key dates, see regulatory guidance (HEM:FHS).
HEMFHS-TP-01: Summary of the FHS assessment wrapper for the Home Energy Model
Extracted: 4/17/2026
14 pages
HEMFHS-TP-02: Occupancy assumptions in the Home Energy Model
Extracted: 4/17/2026
29 pages
HEMFHS-TP-03: Space heating and cooling assumptions in the Home Energy Model
Extracted: 4/17/2026
15 pages
HEMFHS-TP-04: Hot water usage assumptions in the Home Energy Model
Extracted: 4/17/2026
35 pages
HEMFHS-TP-05: Lighting, cooking, electrical appliances, and incidental heat losses in the Home Energy Model
Extracted: 4/17/2026
41 pages
HEMFHS-TP-06: Modelling ventilation and infiltration within the Home Energy Model
Extracted: 4/17/2026
12 pages
HEMFHS-TP-07: Calculating cold water and evaporative losses within the Home Energy Model
Extracted: 4/17/2026
17 pages
HEMFHS-TP-08: Modelling curtains and blinds within the Home Energy Model
Extracted: 4/17/2026
9 pages
HEMFHS-TP-09: Fuel factors within the Home Energy Model
Extracted: 4/17/2026
19 pages
HEMFHS-TP-10: Standardised weather data for the FHS wrapper
Extracted: 4/17/2026
18 pages
Draft HEM:FHS guidance
Draft — subject to change
This guidance is still in draft form and may change before it is finalised. It is provided to logged-in Vulcan users for early reference and does not replace official HEM or HEM:FHS technical publications on GOV.UK.
Supplementary PDF guidance aligned with Future Homes Standard modelling in Vulcan. For GOV.UK technical papers, see the HEM and HEM:FHS assessment sections above.
Sign in with your Vulcan account to open the draft guidance PDFs (8 topics).
Sign in →About This Documentation
We review these documents as the software, policies, and guidance change.
For questions about these documents or to report issues, please ask Vulcan or contact us at hello@usevulcan.app.