Estimation of energy performance before work

The audit shall include the following:

• Estimation of energy performance before work according to the calculation method used to perform the EPD. This estimate can be based on the data collected for the last EPD of the building.
• Diagram showing the distribution of heat losses
• Information on existing control devices (measuring, regulating and controlling devices controlling the equipment of the building)

Proposals for work

The audit must contain 2 minimum work proposals for achieving a successful renovation.

These proposals must comply with the following conditions:

• They must be compatible with the technical, architectural and heritage characteristics laid down in the Heritage Code (for example, in the case of a listed building)
• They must not be disproportionate to the value of the property (this is the case when the cost of the work exceeds 50% of the value of the property)

Each proposal must include a work path in 1 or more steps consistent with each other. They must make it possible to ensure satisfactory treatment of interfaces and interactions, in particular thermal bridges and air tightness, and the attainment of a satisfactory level of hygrothermal comfort.

1^re proposal

It must provide for a step-by-step workflow to achieve a successful renovation.

This work path includes in particular the study of six work stations :

• Insulation of walls
• Insulation of low floors
• Roof insulation
• Replacement of exterior carpentry
• Replacement of ventilation
• Replacement of heating and domestic hot water production and associated interfaces

This work path must comply with the following conditions: 

• The 1^restage of works must make it possible to achieve a gain of at least 2 energy classes and to carry out the treatment of 2 insulation stations
• The final step shall achieve a level of performance at least equal to that of performance class B

2^me proposal

It must provide for a 1-step workflow to achieve a successful renovation.

This work path includes in particular the study of six work stations :

• Insulation of walls
• Insulation of low floors
• Roof insulation
• Replacement of exterior carpentry
• Replacement of ventilation
• Replacement of heating and domestic hot water production and associated interfaces

Energy performance after work

The audit shall specify for each stage of the work path the following information: 

• Annual energy consumption primary and final of the building after work related to its surface after work expressed respectively in kWhEP/m²/year and kWhEF/m²/year for each of the energy uses (heating, cooling, domestic hot water, lighting and auxiliaries) 
• Total annual energy consumption primary and final of the building after work related to its surface after work expressed respectively in kWhEP/m²/year and kWhEF/m²/year for all energy uses (heating, cooling, domestic hot water, lighting and auxiliaries). These consumptions are estimated with and without deduction of the production of self-consumed photovoltaic energy
• Greenhouse gas emissions of the building after work for all energy uses (heating, cooling, domestic hot water, lighting and auxiliaries) related to the surface after work expressed in kgCO2eq/m² SHAB/year
• Energy Performance Rating building after work, taking into account the total annual primary energy consumption for all energy uses (heating, cooling, domestic hot water, lighting and auxiliaries)
• Greenhouse gas classification of the building after work within the meaning of the EAD
• Estimated energy savings in primary and final energy, and avoided greenhouse gas emissions (in absolute terms, then in relative terms to the initial state before work)
• Estimation of the theoretical impact of the work proposed annual energy charges, in the form of a cost-saving range

Cost of works and aid available

The audit shall include the following information:

• Estimated cost of energy performance improvement work and other work necessarily related to the completion of such improvement work
• Main financial support available for this work

The auditor must ensure that the work packages are selected in a manner consistent with the expected energy savings and the value of the property.

Ventilation or ventilation conditions of the building prior to work

The audit should mention recommended work on opaque or glazed walls facing the exterior of buildings.

Ventilation and heating installations may be accompanied by one of the following measures:

• Additional work to ensure sufficient but controlled renewal of air
• Recommendations on the management and maintenance of the ventilation system to ensure satisfactory air renewal conditions. When the air renewal is insufficient or uncontrolled, the work to remedy it is proposed as early as 1^re stage of the work path.

Summary Report

The audit shall give rise to a summary report drawn up in PDF format, including in particular the following information and documents:

• State of the building. The auditor may take stock of the building's situation as indicated in the EPD, after having checked beforehand during his visit that the elements of the standardized summary of this diagnosis are those actually implemented in the building and having corrected them if necessary
• Summary of all audit content items
• Annex explaining the different technical concepts
• Reference to the structures responsible for providing information, advice and support for energy renovation
• Justification of the technical, architectural, heritage or cost characteristics of the works that allow a derogation from the audit content
• Name and version of audit software used

The summary report must be sent to you within one month of the date of the visit of the building, in a format paper and informatics.

Standardized Summary

The audit shall also result in a standardized summary at XML format containing all the data provided by the auditor and those calculated for carrying out the audit, including the following:

• General, including building administrative data
• Characteristics of the building envelope (surfaces, orientation, thermal characteristics, ...)
• Characteristics of technical systems (types of energy, generator, emitter, ventilation, presence of boiler-related ratio, etc.)
• Indicators of the performance of the building before work (primary and final energy consumption, greenhouse gas emissions, annual energy costs, etc.)
• Recommendations for improvement and indicators of the performance of the building after work (technical description of the work, primary and final energy consumption, ...)
• Economic and financial analysis of the recommendations for improvement (estimation of the cost of the work to improve the energy performance of the building and of the other work needed, financial assistance available, annual energy costs after work, etc.)