Typical appointments
- New dwellings and residential developments
- Residential conversions or extensions where applicable
- Early fabric and building-services option studies
- Design updates affecting heating, hot water or ventilation
Energy and compliance
SAP assessments
Residential energy assessment coordinated with fabric, heating, hot water, ventilation and renewable-energy decisions.
Service overview
Assessment connected to design decisions
SAP inputs are most valuable when they are coordinated with the live residential design. MEPX can organise assumptions, identify missing information and test how fabric and building-services choices influence the assessment.
Assessment, final evidence and lodgement responsibilities are confirmed for each project before work begins.
Scope note Applicable assessment, evidence, lodgement and third-party responsibilities are confirmed for each commission.
Project fit
When the service is useful
Information to begin
- Dwelling drawings, orientation and geometry
- Fabric build-ups, thermal bridges and glazing
- Heating, hot-water and ventilation proposals
- Renewable systems, controls and product information
Technical scope
Outputs and design considerations
Typical deliverables
- Inputs and assumptions schedule
- Design-stage SAP assessment outputs
- Compliance-risk and option-comparison advice
- Evidence coordination through the agreed project stages
Design considerations
- Fabric heat loss and thermal bridging
- Heating and hot-water efficiency
- Ventilation and airtightness strategy
- Renewable energy and overheating interfaces
Common questions
Before commissioning the work
What is a SAP assessment?
SAP is the methodology used to assess the energy performance of new dwellings and certain residential work. The precise assessment and lodgement requirements depend on the project.
When should SAP inputs be reviewed?
Review should begin while fabric, glazing, heating, hot water, ventilation and renewable strategies can still be changed.
Does SAP replace detailed MEP design?
No. SAP is an energy-assessment methodology; coordinated mechanical, electrical and public-health design remains a separate project activity.
How does Part O relate to SAP?
Part O addresses overheating risk and has a different assessment purpose. Residential projects may require both workstreams to be coordinated.
Project discussion
Confirm the assessment route early
Share the building type, location, design stage and available information. MEPX can identify the likely assessment scope and information needed to proceed.