Documentation
Official policies and documentation for Vulcan Energy Modelling Software.
Regulatory guidance
General
Scheme
Software Documentation
Vulcan Software Documentation
Last updated: 4/30/2026
Getting started with Vulcan
Last updated: 3/27/2026
Setting up Vulcan Software
Last updated: 3/26/2026
Geometry: Section Guide
Last updated: 3/26/2026
Fabric calculators: assemblies, thermal mass, ground floors, and unheated spaces
Last updated: 5/1/2026
Calculate: Section Guide
Last updated: 3/26/2026
Scenarios: Section Guide
Last updated: 3/26/2026
Results: Section Guide
Last updated: 3/26/2026
Vulcan MCP Server Guide
Last updated: 1/9/2026
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
Document ID: HEM-TP-01
Extracted: 4/17/2026
12 pages
HEM-TP-02: General summary of wrappers
Document ID: HEM-TP-02
Extracted: 4/17/2026
8 pages
HEM-TP-03: External conditions
Document ID: HEM-TP-03
Extracted: 4/17/2026
9 pages
HEM-TP-04: Space heating and cooling demand
Document ID: HEM-TP-04
Extracted: 4/17/2026
16 pages
HEM-TP-05: Fabric heat loss
Document ID: HEM-TP-05
Extracted: 4/17/2026
18 pages
HEM-TP-06: Infiltration and ventilation heat loss
Document ID: HEM-TP-06
Extracted: 4/17/2026
22 pages
HEM-TP-07: Thermal mass
Document ID: HEM-TP-07
Extracted: 4/17/2026
12 pages
HEM-TP-08: Solar gains and shading
Document ID: HEM-TP-08
Extracted: 4/17/2026
20 pages
HEM-TP-09: Energy for domestic hot water
Document ID: HEM-TP-09
Extracted: 4/17/2026
10 pages
HEM-TP-10: Ductwork and pipework losses
Document ID: HEM-TP-10
Extracted: 4/17/2026
14 pages
HEM-TP-11: Hot water storage tanks
Document ID: HEM-TP-11
Extracted: 4/17/2026
18 pages
HEM-TP-12: Heat pump methodology
Document ID: HEM-TP-12
Extracted: 4/17/2026
39 pages
HEM-TP-13: Storage heaters
Document ID: HEM-TP-13
Extracted: 4/17/2026
12 pages
HEM-TP-14: Boiler methodology
Document ID: HEM-TP-14
Extracted: 4/17/2026
21 pages
HEM-TP-15: Heat batteries
Document ID: HEM-TP-15
Extracted: 4/17/2026
22 pages
HEM-TP-16: Heat emitters
Document ID: HEM-TP-16
Extracted: 4/17/2026
19 pages
HEM-TP-17: Controls
Document ID: HEM-TP-17
Extracted: 4/17/2026
15 pages
HEM-TP-18: PV generation and self-consumption
Document ID: HEM-TP-18
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
Document ID: HEMFHS-TP-01
Extracted: 4/17/2026
14 pages
HEMFHS-TP-02: Occupancy assumptions in the Home Energy Model
Document ID: HEMFHS-TP-02
Extracted: 4/17/2026
29 pages
HEMFHS-TP-03: Space heating and cooling assumptions in the Home Energy Model
Document ID: HEMFHS-TP-03
Extracted: 4/17/2026
15 pages
HEMFHS-TP-04: Hot water usage assumptions in the Home Energy Model
Document ID: HEMFHS-TP-04
Extracted: 4/17/2026
35 pages
HEMFHS-TP-05: Lighting, cooking, electrical appliances, and incidental heat losses in the Home Energy Model
Document ID: HEMFHS-TP-05
Extracted: 4/17/2026
41 pages
HEMFHS-TP-06: Modelling ventilation and infiltration within the Home Energy Model
Document ID: HEMFHS-TP-06
Extracted: 4/17/2026
12 pages
HEMFHS-TP-07: Calculating cold water and evaporative losses within the Home Energy Model
Document ID: HEMFHS-TP-07
Extracted: 4/17/2026
17 pages
HEMFHS-TP-08: Modelling curtains and blinds within the Home Energy Model
Document ID: HEMFHS-TP-08
Extracted: 4/17/2026
9 pages
HEMFHS-TP-09: Fuel factors within the Home Energy Model
Document ID: HEMFHS-TP-09
Extracted: 4/17/2026
19 pages
HEMFHS-TP-10: Standardised weather data for the FHS wrapper
Document ID: HEMFHS-TP-10
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
All content is kept up-to-date with the latest versions of our policies.
For questions about these policies or to report issues, please ask Vulcan or contact us at hello@usevulcan.app.