SERVICES
At Doherty Energy we offer a wide range of services to help ensure every aspect of your project is energy efficient, compliant and value engineered for both building and running costs.
Although the services we offer can often be bundled together to ensure you have the right support from getting from inception all the way through to completion, each service can be undertaken separately.
Our Range of services is listed below:
Energy Statement
• Support Planning Applications
• Follow Energy Hierarchy - Be Lean
- Be Clean
- Be Green
• Identify Targets for Reduction in Carbon Dioxide Emissions
• Analyse Fabric and Building Services Efficiencies
• Low or Zero Carbon/Renewable Technology Feasibility Studies
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Energy Statement Greater London
• Energy Statement in Accordance with Greater London Authority Requirements
• Follow Mayors Energy Hierarchy - Be Lean - use less energy
- Be Clean - supply energy efficiently
- Be Green - use renewable technology
• Achieve Zero Carbon Homes
• Evaluate the water usage of the proposed dwellings
• Assess Overheating
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Sustainability Reports
• Enhanced Energy Statement
• Sustainability Appraisals
• Water Efficiency Analysis
• Renewable Energy Feasibility Studies
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Code for Sustainable Homes
• Licenced Code Assessors
• Provide Code Assessments
• Advice on how to improve the dwellings
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BREEAM Domestic Refurbishment
• Licenced BREEAM Domestic Refurbishment
• Provide Domestic Refurbishment Assessments
• Advice on how to improve the dwellings
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SAP Assessments for new dwellings
• Approved SAP Assessors
• On Construction Domestic Energy Assessors
• U Value Calculations
• Advice on how to improve the dwellings
• Demonstrate compliance with Building Regulations Approved Document L1A
• On Construction Energy Performance Certificates
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SAP Assessments for conversions
• Required for a building converted to create a new dwelling
• Material change of use to form dwelling
• Advice on how to improve the dwellings
• Approved SAP Assessors
• U Value Calculations
• Demonstrate compliance with Building Regulations Approved Document L1B
• On Construction Energy Performance Certificates
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SAP Assessments for extensions with large amounts of openings
• Required if extension has large amounts of openings
• Extensions are only permitted to have openings no greater than 25% of the
floor area plus an openings that are lost due to the extension
• Establish the opening areas allowed
• Advice on how to improve the dwelling and extension
• Area weighted U Value Calculations
• Demonstrate compliance with Building Regulations Approved Document L1B
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rdSAP Assessments
• Approved rdSAP Assessors
• Domestic Energy Assessors
• Advice on how to improve the dwellings
• Energy Performance Certificates
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SBEM Modelling
• Simplified Building Energy Model
• Calculate the energy required to heat, cool, ventilate and light a non-dwelling
• Accredited Assessors
• Demonstrate compliance with Building Regulations Approved Document L2A
• Advice on how to improve the building
• Energy Performance Certificates
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Water Efficiency Calculations
• Demonstrate compliance with Building Regulations Approved Document G
• Advice on the minimum acceptable efficiency for each fitting including,
flow rates of taps and showers, washing machine and dishwasher usage
along with WC flush rates
• Advice on how to improve the water efficiency of dwellings
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Air Permeability Testing
• An air leakage test to determine the level of uncontrolled air flow through gaps
or cracks in the fabric of a building
• Residential and Non-Residential Testing
• Meet the requirements of Approved Document L1A and L2A
• Advice on how to improve the dwellings
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Ventilation Flow Testing
• Flow rate testing for all mechanical extract fans
• Demonstrate compliance with Building Regulations Approved Document F
• Intermittent extract fans and Mechanical Ventilation Heat Recovery systems
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Sound Testing
• Sound Insulation testing in accordance with BS EN ISO 140-4
and BS EN ISO 140-7
• Full ‘end-to-end’ support – from initial Design & Consultancy
to Testing & Certification
• Noise Impact Assessments
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Thermographic Surveys
• Identify thermal bridging and Inadequate/missing or defective insulation
• Air leakage through the building envelope
• Quality of the cavity wall insulation
• Surveys to meet requirements of BREEAM assessments
• Surveys carried out in accordance with BRE 176 by
an Accredited Thermographic Engineer
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Dew Point Analysis
• Dew point calculations for thermal envelopes
• Interstitial condensation risk analysis
• Surface Condensation Prediction
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On Construction Energy Performance Certificates
• Assesses how energy efficient the new property is as a building
• Ratings between A and G, A being the highest
• On Construction EPCs are produced off plan using full SAP
(standard assessment procedure).
• The certificate is required by Building Control to sign of new dwelling
• Required to sell or rent a new property
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Energy Performance Certificates
• Assesses how energy efficient the existing property is as a building
• Ratings between A and G, A being the highest
• EPCs are produced off plan using rdSAP
• Required to sell or rent a residential property
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