Building standards - energy and environmental compliance handbook: consultation proposals

Schedule A – Domestic

Energy and Environmental Compliance

Guidance on gathering information and evidence to support the production of Design and Construction Statements

Section 3 - Environment

Heating (Standard 3.13)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Floor plans showing heating layouts

Specifications

• Heating system type
• Heat unit specification
• Heat emitters specification

Product datasheets

• Heating unit manufacturer’s literature
• Heating emitters manufacturer’s literature

Performance calculations

• Heat loss calculation to a recognised standard
• Heating system capacity calculation

Systems design

• Heating system performance specification
• Heating system capability to be upgraded

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Heating system as installed

Delivery notes

• Heat units
• Heat emitters

Product labels

• Heat units
• Heat emitters

Testing results and reports

• Heating system installation records

Commissioning certificates

• Heating system commissioning

Handover information

• Heating system user handbook / manual
• Heating system maintenance requirements

Ventilation (Standard 3.14)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Floor plans showing ventilation layouts (units, fans, ducting, etc)
• Layouts showing air transfer paths between rooms
• Layouts showing background ventilation
• Ventilation schedules
• Window/door schedules showing opening area requirements
• Layouts showing location of extract fans
• Layouts showing location of CO2 monitors
• Layouts showing humidistat controls
• Layouts showing access for commissioning
• Testing and commissioning schedule
• Layouts showing access for maintenance

Specifications

• Ventilation system type
• Ventilation fan(s) specification
• Minimum dimension from underside of door leaf to floor required
• Background ventilation equivalent area(s)
• CO2 monitor
• Humidistat controls
• Commissioning requirements

Product datasheets

• Ventilation unit manufacturer’s literature
• Fan manufacturer’s literature
• Duct manufacturer’s literature
• Transfer grille manufacturer’s literature
• Windows/doors and any restrictors

Performance calculations

• Ventilation requirement calculation
• Background ventilation calculation
• Purge ventilation calculation
• Extract ventilation rate calculation
• Heat recovery calculation

Systems design

• Ventilation system performance specification (natural, intermittent mechanical or continuous mechanical)
• Ventilation schematic
• Commissiong points schematic
• Written description of how to operate and maintain the ventilation system

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Ventilation system as installed
• Ventilation units as installed
• Extract Fans as installed
• Background/trickle vents as installed
• Ducting as installed
• Transfer grilles as installed
• CO2 monitor as installed
• Humidistat controls as installed
• Demonstrate dimension from underside of door leaf to floor
• Demonstrate opening areas of windows/doors/ventilators
• Ventilation filters installed

Delivery notes

• Ventilation units
• Extract Fans
• Ducting
• Transfer grilles
• CO2 monitor
• Humidistat controls

Product labels

• Ventilation units
• Extract Fans
• CO2 monitor
• Humidistat controls

Testing results and reports

• Ventilation system installation records

Commissioning certificates

• Ventilation system commissioning reports
• Demonstrate accordance with ventilation schedules

Handover information

• Ventilation system user handbook / manual
• Ventilation system maintenance requirements

Overheating Risk (Standard 3.28)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Drawings and / or schedules illustrating g-values of specific windows/doors (where g-value varies across the project)
• Drawing showing opening free area of windows
• Elevations and/or detail drawings as required to show shading measures, with sizes noted and orientation

Specifications

• Glazing Specification with g-value(s) required
• Any shading devices / products

Performance calculations

• Glazing calculation(s) showing g-value to 2 decimal places (calculated to EN 410)
• Assessment on number of exposed facades and arrangement of openings which provide ventilation to apartments or other habitable spaces

Energy modelling

Overheating Risk – Simple method

Including:

• Dimensioned plan drawings
• Glazing/floor area ratio calculation
• G-valve compensation calculation(s), where required

Overheating Risk – Dynamic thermal analysis modelling including:

• TM59 Dynamic thermal modelling report
• Reference to drawings recording the building geometry used
• Schedule of the fabric U-values, window U-values and g-values, ventilation strategy, permanent shading devices that have been used in the simulation
• Specifications or manufacturer's data sheets for the fabric U-values, window U-values and g-values, ventilation strategy,
• Details of permanent shading devices

Systems design

• Statement on practicality issues considered and assessed for developing the overheating mitigation strategy
• Written description of the overheating mitigation systems included in the design (including any provisions made to address site-specific and environmental constraints) and how to operate and maintain them
• Description of user control for boost vent & schedules demonstrating boost ventilation rates

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• All elevations as built
• All glazing unit label(s) as installed in window / door (showing reference to demonstrate correct unit is installed in the correct component, on correct elevation)
• Windows / doors (with any restrictors fitted) demonstrating free area requirement
• Any shading devices as installed

Delivery notes

• Window / door supplier(s)
• Glazing supplier(s)
• Any shading devices

Product labels

• Window / door supplier(s)
• Glazing supplier(s)
• Any shading devices

Handover information

• User handbook/manual with written description of overheating mitigation systems, including any provisions made to address site-specific and environmental constraints, as well as how to operate and maintain them

Section 6 - Energy

Energy Demand (Standard 6.1)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Energy modelling

Energy Demand Calculation including:

• Energy model following UK National Calculation Methodology
• Building layout (showing internal floor area), elevations (showing windows, doors and roof profiles) and section drawings (showing floor to floor height and roof profiles)
• 3D model or calculation showing external wall, floor and roof areas
• Site plans showing the orientation and shading objects
• Full address and postcode and weather file used
• Specification of any low and zero carbon electricity generators

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Low and zero carbon generating technology (including any inverters for solar PV) as installed

Delivery notes

• Low and zero carbon generating technology (including any inverters for solar PV) as installed

Product labels

• Low and zero carbon generating technology showing manufacturer and model name (including any inverters for solar PV) as installed

Testing results and reports

• As built energy demand calculation

Building Insulation Envelope (Standard 6.2)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Detailed drawings of all external buildups with the material thicknesses and products (material & performance) clearly stated and repeating thermal bridges shown
• Drawings that clearly show the locations of all buildups
• General arrangement drawings clearly identifying exposed edges and instances of abutting elements
• Detailed drawings of cavity separating walls. The material specifications and material thickness should be clearly shown
• Window component drawings, elevations and schedules
• Plan, section and detail drawings of all key non-repeating thermal bridges and their location with airtight, thermal and windtight lines shown
• Markups or labelled model showing the lengths/quantities of all non-repeating thermal bridges
• Schedule of all thermal bridges with justification for their assigned psi/chi value (demonstrate that value assigned is conservative stating its source, or provide a calculation in accordance with BS EN ISO 10211: 2017)

Specifications

• Insulation products to be used including thickness
• State that insulation is to be continuous, with no gaps or voids over 3mm, not be over compressed and be in two layers with offset joints
• Insulation, wind & airtight products including tapes and seals to be used at junctions
• Other products, including wall ties, masonry support angles and any other thermal bridging elements referencing thermal conductivity of products and any thermal shims or breaks required
• All windows, doors and rooflights with manufacturer, model, height, width, frame depth & thickness, glass U-value, glazing g-value, frame U-value and glazing to frame psi value
• Products to be used to form and repair the airtight layer stating that membranes, tapes & seals should be applied to firm, solid and clean substrate to aid application and that gaps greater than 6mm in the substrate are not permitted
• Products used to seal around service penetrations, window and door openings to the airtight line
• Requirement for air tightness testing, the target to be met and the air testing strategy
• Any interim air tests with their purpose, process and when they should occur

Product datasheets

• Insulation and any other relevant products that includes thermal conductivity and moisture absorptivity where relevant
• Products used for sealing any perimeter cavities
• All air tightness products used (including any membranes, boards, tapes, etc) stating their air permeability and compatibility with other materials used on the building
• Window/Door/Rooflight datasheet with air tightness class stated classification according to BS 12207 (typically class 4)

Performance calculations

• U-Value calculations calculated either by using insulation to a thickness derived from manufacturers’ data relating to thermal conductivities (W/mK) and thermal transmittances (U-values: W/m2K) certified by a notified body, or in accordance with BS EN ISO 6946:2017 and for floors adjacent to ground/basements BS EN ISO 13370: 2017
• Where the 'space heating demand limit' approach is taken for new dwellings, the reported space heating demand from the SAP model must be below the 'dwelling space heating demand limit'
• Calculation to show the overall window/door element U-value using BS EN ISO 10077-1: 2017, BS EN ISO 10077-2: 2017 or (for rooflights) BS EN ISO 12567-2: 2005
• Thermal bridge calculation(s) demonstrating minimum surface temperature is within the minimum requirement

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Each building element (different wall types, roof, soffits, etc.)
• Show large overall section of element being represented
• Insulation products installed showing type and thickness
• Show that the insulation is continuous, with no gaps or voids over 3mm, not over compressed, cut cleanly and in two layers with offset joints
• Show that insulation is cut neatly around service penetrations
• Each instance of a cavity seal around the perimeter
• Show large overall section of element being represented
• Show that the cavity is fully filled with a material that limits air movement
• Each window/door/rooflight product type installed showing fixings, interface with airtight layer, interface with insulation and overall installation (NB it is not necessary to photograph all windows & doors)
• Each of the key junction details as agreed with the verifier to show installation is as designed
• Show airtight line / products as installed, fully seated with no gaps or breaks
• Show insulation well installed with no voids or gaps over 3mm
• Any bridging elements (column, masonry supports etc.) to be photographed with a tape measure to demonstrate it has been installed in line with the design
• Typical service penetrations and any additional instances agreed with the verifier

Delivery notes

• For each insulation product including manufacturer, product name and lamda value
• For each window/door/rooflight product including manufacturer, product name and lamda value
• For all airtight layer membranes, tapes & seals

Product labels

• For each insulation product including manufacturer, product name and lamda value
• For each window/door/rooflight product including manufacturer, product name and lamda value
• For all airtight layer membranes, tapes & seals

Testing results and reports

• As built general arrangement drawings, including elevations and window/door schedules
• As built schedule of thermal bridges with psi values aligned to the as built details
• Air tightness test certificate and method statement (It is not necessary to provide any interim tests in the final evidence pack. The builder may choose to hold interim results in their evolving evidence pack as part of their wider risk and quality management process. If so, their status should be clearly identified.)

Heating System (Standard 6.3)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Heating system design drawings
• Mechanical schedule
• Controls drawings

Specifications

• Mechanical specification
• Controls specification

Product datasheets

• Detailed performance specification or product datasheet of heating system components (giving COP/SCOP (to BS EN 14511-2), if applicable, aligned with system design temperature

Systems design

• Design in line with guidance in Compliance Guide in respect to efficiency of heat source, system circulation, system preparation, hot water storage, interlock, zoning, time & temperature controls, flowrate controls, supply temperature, installation, etc

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Heating system as installed
• Heating plant showing model plates

Delivery notes

• Heat units
• Heat emitters

Product labels

• Heat units
• Heat emitters

Testing results and reports

• As installed heating system modelling calculations
• Heating system installation records

Commissioning certificates

• Heating system commissioning

Handover information

• As installed heating system drawings, schedules and specifications.
• Heating system user handbook / manual
• Heating system maintenance requirements

Insulation of Pipes, Ducts & Vessels (Standard 6.4)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Specifications

• Pipes/ducts - Specification noting insulation products to be used including thickness

Product datasheets

• Insulation product datasheet or detailed performance specification

Performance calculations

• Vessels - Standing heat loss calculations, backed up with specification of insulation including thickness and thermal conductivity and insulation product datasheet or detailed performance specification

Systems design

• Demonstrate that pipes ducts and vessels have been addressed as provided in the section 9 of the Non-domestic Building Services Compliance Guide for Scotland

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Hot water storage vessel as installed
• Insulation thicknesses to pipes and ducts as installed
• Show no voids or gaps greater than 3mm between or under insulation

Delivery notes

• Hot water storage vessel as installed
• Insulation product(s)

Product labels

• Hot water storage vessel confirming capacity, standing heat loss and heat exchanger performance
• Insulation product(s) including manufacturer and lambda value

Artificial & Display Lighting (Standard 6.5)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Lighting layouts showing number of luminaires and lighting controls

Specifications

• Controls description/specification

Product datasheets

• Datasheet/ luminaire schedule confirming efficacy (lm/W)

Performance calculations

• LENI calculation, if applicable

Systems design

• Demonstrate that internal lighting efficiency has been addressed as provided in the section 13 of the Domestic Building Services Compliance Guide for Scotland

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Each luminaire type as showing extent in typical room

Delivery notes

• Each luminaire type as installed
• Each controls type as installed

Handover information

• Controls user manual(s) / manufacturer’s literature

Mechanical Ventilation and Air Conditioning (Standard 6.6)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Drawings and / or schedules illustrating g-values of specific windows (where g-value varies across the project)
• Drawing showing opening free area of windows/doors
• Elevations and/or detail drawings as required to show shading measures, with sizes noted
• Ventilation schedules/schematics/ layouts showing system requirements and performance
• Drawings & specification noting filter type and demonstrating sufficient space for maintenance
• Drawings & specification noting controller location & controller specification
• Drawings illustrating duct lengths and access for commissioning and maintenance
• Details showing any interface of ducts with external envelope and airtight line
• Drawings or schematics showing location of any dampers

Specifications

• Glazing Specification with g-value(s) required
• Description of user control for boost vent & schedules demonstrating boost ventilation rates
• Any shading products required
• Performance specification of any proposed equipment
• Any insulation products to ducting including type, lambda value and thickness - state that insulation is to be continuous with no gaps or voids over 3mm and insulation must not be over compressed
• Any airtight dampers

Product datasheets

• Ventilation equipment
• Insulation to ducting including any tapes, vapour barriers, etc

Performance calculations

• Glazing calculation certificate showing g-value to 2 decimal places (calculated to EN 410)
• System efficiency calculated at commissioned design flow rate

Systems design

• If overheating risk assessment requires cooling, demonstrate that mechanical ventilation and air conditioning efficiency has been addressed as provided in the sections 10 and 11 of the Domestic Building Services Compliance Guide for Scotland

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Ventilation units as installed showing location(s)
• Filters as installed identifying type
• Show MVHR / AHU installation with sufficient space for filter removal
• Show controller switch location and controller
• Show length of cold ducts inside and warm ducts outside the thermal envelope
• Demonstrate no voids or gaps greater than 3mm between or under insulation
• Show ducts sealed to airtight line of building and duct to MVHR / AHU
• Repeat the above for each type of ventilation system used

Delivery notes

• Ventilation units as installed
• Any filters as installed
• Any controls equipment as installed
• Insulation products as installed
• Ducting as installed

Product labels

• Ventilation units as installed
• Any filters as installed
• Any controls equipment as installed
• Insulation products as installed
• Ducting as installed

Testing results and reports

• As installed system efficiency calculation

Commissioning certificates

• Commissioning reports demonstrating ventilation has been commissioned in line with the ventilation schedules
• A +5% tolerance is acceptable
• Not more than 10% imbalance between total supply and extract

Handover information

• As installed drawings, schedules, specifications

Commissioning Building Services (Standard 6.7)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Layouts showing access for commissioning, inspection and maintenance of services

Specifications

• Testing & commissioning schedule
• Specifications detailing commissioning requirements for MEP systems and any active architectural systems (e.g. powered ventilation openings)
• Identify any enhanced load, duration and/or multi-system tests that will be required to demonstrate compliance, in particular for made-to-order equipment or less common systems

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Testing results and reports

• Report on the outcomes of any commissioning review
• Commissioning statements, including commentary and records of the testing and commissioning programme and compliance or variations from the testing and commissioning requirement set out in the design statement

Commissioning certificates

• Commissioning certificates for all systems and services

Note – some commissioning evidence will often be included under other sections of the construction statement, and should be clearly referenced as required

Metering (Standard 6.10)

Design Information to support the production of the Energy and Environmental Design Statement

Not applicable to domestic buildings.

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Not applicable to domestic buildings.

Section 7 - Sustainability

Statement of Sustainability (Standard 7.1)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Provide plans, sections, elevations, details, schedules, specification, etc, as appropriate to demonstrate level of sustainability proposed

Specifications

• Specify level of sustainability proposed:
• Bronze level
• Bronze Active level
• Silver level
• Silver Active level
• Gold level

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Statement of sustainability (sustainability label, or SL) fixed to the building, including the level of sustainability achieved, in a location that is readily accessible, protected from weather and not easily obscured
• Other photographs as appropriate for the level of sustainability to demonstrate associated elements as built/as installed

Testing results and reports

• Calculations as appropriate for the level of sustainability to demonstrate associated elements as built/as installed

Handover information

• Quick start guides/guidance/labels as appropriate for the level of sustainability to demonstrate associated elements as built/as installed

Electric Vehicle Charging (Standard 7.2)

Design Information to support the production of the Energy and Environmental Design Statement

Supporting design information includes, but should not be limited to:

Design drawings

• Schedule of equipment
• Location of charge points shown on plan drawings
• Assignment of any car parking spaces (if applicable)
• Duct and chamber layouts and sizes based upon the confirmed schematic arrangement and type of cabling needed to meet the required power supply at outlets for any enabling infrastructure

Specifications

• Specification of equipment

Product datasheets

• Datasheets for charge points showing nominal rated output and compliance with BS 7671 and IET’s ‘Code of Practice: Electric Vehicle Charging Equipment Installation’

Performance calculations

• Electrical demand calculation

Systems design

• Written quotation for the cost of electrical supply to development site (if applicable)

Construction Evidence to support the production of the Energy and Environmental Construction Statement

Construction evidence should include, but not be limited to:

Photographs

• Each type of equipment as installed
• Charge point locations as installed
• Electrical meter showing power output from charge points
• Assignment of any car parking spaces (if applicable)
• Universal socket, indicator/visual display, manufacturer and model
• Clear, unobstructed ducts and champers with pulling lines for any enabling infrastructure

Commissioning certificates

• Commissioning information for the charge point(s) and any associated control equipment

Handover information

• Quick Start guides
• Manufacturer’s literature on installed products
• As built drawings showing the location of all installed ductwork and equipment, also identifying all enabling infrastructure which will support the addition of charge points in the future