ORCalc
ORCalc is the name of the UK government-mandated software which is used to generate Display Energy Certificate (DEC) and Advisory Reports for buildings in the UK. ORCalc stands for Operational Rating (OR) calculation because it is based on a buildings actual operation energy consumption data.
This is as opposed to for example Energy Performance Certificates (EPCs) which look very similar but are generated using modelled building energy based either the Standard Assessment Procedure (SAP) methodology or Simplified Building Energy Model (SBEM) and a variety of assumptions.
It can be downloaded for free but is primarily used by energy assessors who are qualified and competent in the use of the software to produce DECs.
For further information visit: Guidance Display Energy Certificates and advisory reports for public buildings
aswell as https://www.uk-ncm.org.uk/index.jsp or https://www.ncm-pcdb.org.uk/sap/page.jsp?id=7
[edit] Related articles on Designing Buildings
- Accredited energy assessor.
- Air tightness.
- Are Energy Performance Certificates accurate?
- BS EN 15232 Energy performance of buildings: impact of building automation, controls and building management.
- Building performance.
- Building performance metrics.
- Carbon ratings for buildings.
- Certificates in the construction industry.
- CRC Energy Efficiency Scheme.
- Display energy certificate.
- Emission rates.
- Energy certificates for buildings.
- Energy efficiency of traditional buildings.
- Energy performance certificate EPC.
- Energy Performance of Buildings Directive.
- Energy related products regulations.
- Energy Savings Opportunity Scheme.
- Energy targets.
- Green mortgage.
- Home information pack HIP.
- Homebuyer Report.
- How are EPCs produced?
- How much does it cost to sell my home.
- Listed buildings.
- Minimum energy efficiency standard (MEES).
- Minimum energy efficiency standard regulations for domestic and non-domestic buildings.
- NABERS UK.
- National Calculation Method.
- National Retrofit Strategy NRS.
- Non-domestic private rented property minimum standard.
- Passivhaus vs SAP.
- Performance gap.
- Private rented sector regulations and traditional buildings.
- Retrofit.
- Simplified Building Energy Model.
- The EPC consultation in the context of changes to the NCM.
- The Home Energy Model and Future Homes Standard assessment wrapper.
- U-value conventions in practice: Worked examples using BR 443.
- Energy performance certificate EPC.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
ECA welcomes plans to strengthen subcontractor quality control.
Combining mid-career qualifications with experience broadens career opportunities.
Why being a mentor can help your career.
Channel 4 broadcaster to host 125th anniversary ceremony.
Listed structures on the rail network
Heritage interests and operational requirements must be balanced.
Historic England publishes research into embodied carbon when retrofitting traditional buildings.
New Prime Minister delivers on ECA call for cut in electricity costs.
CIOB reacts to the announcement of Andy Burnham as Prime Minister.
Heritage and conservation science workforce survey - Have your say.
England's Suburbs 1820-2020. Book review.
New, more proportionate and targeted approach for higher-risk building assessments.
Government brings British Steel into public ownership.