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Yohan Jayantha

Yohan Jayantha

Energy Consultant

Engineering / Architecture

Sutton, Greater London

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Services offered

I am a Chartered Building Services Engineer and an Accredited Domestic and Non-Domestic Energy Assessor with extensive experience in the design, assessment, and optimisation of sustainable building services across residential and commercial projects.

As the Director of Haritha Consultants Limited, I lead a multidisciplinary team delivering MEP design, energy performance, SAP and SBEM calculations, Part L and Part O compliance assessments, TM59 overheating studies, and dynamic thermal modelling.

My work focuses on integrating energy efficiency, comfort, and compliance through innovative engineering solutions that meet the latest UK Building Regulations and CIBSE standards. With a strong commitment to sustainability and technical excellence, I help clients achieve high-performing, cost-effective, and environmentally responsible buildings.

Core Expertise:

  • Building Services Design (Mechanical, Electrical, Public Health)
  • SAP & SBEM Calculations (Domestic / Non-Domestic)
  • Part L, Part O, and TM59 Compliance
  • Dynamic Thermal Modelling (IES / DesignBuilder)
  • Low-Carbon and Renewable Energy Solutions
  • Energy Performance Certification (EPC)
  • HVAC Design and Energy Strategy Consultancy
Energy assessor
Mep design
Building services engineer
Hvac design
Energy performance certification
Approximate rate: £ 20 per hour

Experience

Chartered Building Services Engineer and Accredited Domestic & Non-Domestic Energy Assessor with extensive experience in delivering sustainable, compliant, and efficient building services solutions across residential and commercial developments in the UK.

As Director of Haritha Consultants Limited, I oversee MEP design and energy assessment projects, specialising in SAP and SBEM calculations, Part L and Part O compliance, TM59 overheating analysis, and dynamic thermal modelling.

Combining strong technical expertise with a practical understanding of building regulations and energy performance, I help clients achieve cost-effective, energy-efficient, and environmentally responsible designs from concept to completion.

Education

Bachelor of Science (BSc) in Engineering
Comprehensive academic foundation in Building Services and Energy Engineering, with a strong focus on sustainable design, thermodynamics, and building performance analysis. The degree provided the technical grounding and analytical skills that support my professional practice as a Chartered Building Services Engineer and Accredited Energy Assessor.

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