Reduce energy costs by up to 10% through practical, data-led energy audits
Commercial Energy Audits and Building Performance Optimisation
Reduce energy costs, improve building performance, and meet ESOS & compliance requirements through actionable, data-led energy audits.
Typical payback periods of 12–24 months across commercial, industrial and public sector buildings.
“Trusted by Commercial, Industrial and Public Sector Clients to deliver real results”
50+ Combined Years Energy, HVAC and BeMS Audit Experience
“UK and Europe Wide Building Performance Coverage”
Why Most Energy Audits Fail to Deliver Real Savings
Many organisations invest in energy audits but fail to realise meaningful cost savings.
Traditional consultancy approaches often result in:
Reports that are not implemented
Generic recommendations are not aligned to operations
Limited internal engagement
Missed opportunities for ongoing optimisation
Energy drift and degradation (initial savings reduce to baseline)
An external auditor captures only a snapshot on site and applies a general experience offset, which may not suit a site’s operations.
The result? Valuable insights that never translate into measurable outcomes.
At Zerith, we focus on implementation — not just reporting.
Energy Audits That Deliver Measurable Results
Zerith provides commercial energy audits and building performance optimisation services designed to deliver real operational and financial impact.
Our approach combines technical expertise, real-world engineering experience, and data-driven insight to identify and implement opportunities across:
Energy Audits, Energy Treasure Hunts, Energy Kaizen
Building Energy Management Systems (BeMS) Optimisation and Health Checks
HVAC system optimisation
Lighting and controls
Power distribution and demand reduction
Fabric and building performance
Operational energy use and behaviour
We don’t just identify opportunities — we help you implement them.
Read more in our Blog about our approach Here
Zerith offers two flexible delivery models — allowing organisations to either fully outsource delivery or build internal capability, supported by ZECO AI for data analysis, profiling, anomaly detection, energy-saving analysis, and financial benefits, all backed by Zerith’s industry-leading technical expertise.
Both approaches can be applied across a wide range of energy and building performance solutions, including:
Energy Audits, Energy Treasure Hunts, Energy Kaizen (Learn more Here)
Building Energy Management Systems (BeMS) Optimisation and Health Checks (Learn more Here)
HVAC system optimisation (Learn more Here)
Lighting and controls (Learn more Here)
Power distribution and demand reduction (Learn more Here)
Fabric and building performance (Learn more Here)
Operational energy use and behaviour (Learn more Here)
An Energy Audit forms part of Clients ESOS Phase 4 Submission - Learn how to Link an Energy Audit to reduce your Energy Costs with your up coming ESOS Phase 4 obligations Here
OPTION 1: TRADITIONAL CONSULTANCY
Delivery Model
Fully outsourced delivery
Approach
Zerith delivers energy audits and optimisation projects — either as focused standalone services or integrated programmes across multiple systems.
Clear initial scope output and objectives defined.
Scope
From detailed audits through to implementation support across HVAC, BeMS, and wider building systems.
Engagement
Zerith-led delivery with defined client input.
In both delivery models, Zerith leverages the ZECO AI platform to simplify energy data analysis, reduce delivery costs, and enhance the quality of insights.
ZECO enables:
Rapid energy profiling across sites and assets
Identification of trends and anomalies (e.g. out-of-hours consumption)
Automated generation of energy-saving opportunities
Calculation of energy, cost, and carbon savings
Prioritisation of opportunities based on return on investment
Clear, actionable technical insights to support decision-making
Read more about how ZECO AI is changing Consulting Here
Check out our Case Studies Here
OPTION 2 — ZECO AI PLATFORM
Delivery Model
Hybrid or in-house delivery supported by Zerith
Approach
We support your internal teams to deliver energy improvement programmes — including audits, treasure hunts, and Kaizen workshops — while providing technical guidance and structure.
Engagement
High internal ownership, supported by Zerith expertise and specialist knowledge on key areas, e.g. BeMS or Compressed air.
Benefit
Reduced Cost, engaged team continues to seek further savings, reduced risk of energy drift.
Reduce consultancy costs by up to 40% through ZECO-enabled delivery.
Includes Zeriths CIBSE Accredited Low Carbon Consultants support and, where required, accredited sign-off.
Many organisations begin with traditional consultancy and transition to ZECO-enabled in-house delivery — reducing cost while building long-term capability and sustained performance improvement.
See how ZECO AI identifies inefficiencies and prioritises savings automatically
Explore our Sectors
ZECO AI: Smarter Energy & Building Performance Optimisation
Identify inefficiencies, prioritise savings, and deliver results faster
ZECO AI enhances the delivery of energy audits and building performance optimisation by transforming complex data into clear, actionable insight.
The platform enables organisations to:
Analyse energy consumption across buildings and systems
Identify trends and anomalies (e.g. out-of-hours usage)
Automatically generate energy-saving opportunities
Quantify energy, cost, and carbon savings
Prioritise actions based on return on investment
Whether supporting a traditional consultancy approach or enabling in-house delivery, ZECO AI simplifies decision-making and accelerates implementation.
From insight to implementation — ZECO AI guarantees opportunities are recognised, prioritised, and acted upon.
Create Professional Reports using Automated AI Templates.
Prioritised opportunities based on ROI and impact
A Practical, Outcome-Focused Approach
Outcome-Focused
We prioritise measurable, data-driven results — ensuring every engagement delivers real cost and performance improvements.
Practical Delivery
We focus on solutions that can be implemented in real operational environments — not just documented in reports.
Commercially Aligned
Our work aligns with client priorities—balancing compliance, cost reduction, and operational performance.
Data & Insight-Led
We combine data, technology, and expertise to identify opportunities and support better decision-making.
Check out how we have successfully reduced our clients Energy Consumption Here
Proven Cost Reduction
Delivering 5–10% energy savings and 50–70% reductions in consultancy costs through our delivery model.
Energy Consultancy UK • Energy Management • Net Zero • Compliance • Building Performance • BeMS • HVAC Efficiency
Proven Results Across Both Delivery Models
£10M+ energy savings delivered
Track record of 200 Succesful Projects
50years experience in manufacturing process engineering
CIBSE Accredited Low Carbon Consultants, ESOS Lead Assessors, Low Carbon Energy Assessors, Heat Network Consultants and Non-Domestic Energy Assessors.
HVAC & M&E Consultants UK • Energy Consultants UK • BeMS Optimisation
Tailored Solutions for Every Building Type
Where Our Energy Audits Deliver Value
Our building performance audits support organisations across a wide range of sectors and building types, including:
Commercial real estate portfolios (Learn More Here)
Manufacturing and industrial facilities (Learn More Here)
Healthcare and public sector estates (Learn More Here)
Education and university campuses (Learn More Here)
Hotels and leisure environments (Learn More Here)
Apartment and Extra Living (Learn More Here)
Our goal is to deliver cost-effective solutions, targeted & focused to specific needs; no project is too small, and we aim to deliver clear, concise reports within 4 weeks of order placement that deliver value and actionable insights.
From single buildings to complex multi-site estates, our approach scales to meet your needs.
Energy Consultancy UK
Building performance improvements often support:
FAQs: Commercial Energy Audit & Building Performance
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A commercial energy audit provides a structured assessment of how energy is used across a building, site, or portfolio, identifying opportunities to improve efficiency, reduce costs, and lower carbon emissions.
At Zerith, a commercial energy audit typically includes:
Review of energy consumption data and operating patterns
Assessment of building fabric, plant, and systems such as HVAC, lighting, hot water, and controls
Evaluation of building management systems (BEMS) and operational setpoints
Identification of energy efficiency and optimisation opportunities, from low-cost operational changes to capital measures
Quantification of energy, carbon, and cost savings, with indicative payback periods
Clear, prioritised recommendations that support investment decisions and wider Net Zero objectives
Zerith’s audits are designed to be focused, practical, and actionable, enabling organisations to move quickly from assessment to implementation and measurable performance improvement.
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Return on investment (ROI) from energy efficiency is calculated by comparing the cost of implementing energy measures against the financial savings they generate over time.
At Zerith, we calculate ROI by:
Establishing a clear energy and cost baseline using historical consumption and tariffs
Quantifying annual energy savings from each efficiency measure (kWh, fuel, and cost)
Identifying capital and implementation costs, including installation and commissioning
Calculating payback period, net savings, and lifecycle value
Considering wider benefits such as reduced maintenance costs, improved resilience, and carbon reduction
Measures are then prioritised based on payback, risk, and deliverability, ensuring investment decisions are commercially robust. This approach allows organisations to focus on projects that deliver fast returns while supporting long-term energy and Net Zero objectives.
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Absolutely. Industrial energy audits are a core specialism at Zerith.
We work directly with manufacturing teams to identify, quantify, and prioritise energy reduction opportunities across process plant, utilities, buildings, and site infrastructure. Our approach combines detailed technical analysis with hands-on engagement, ensuring audits deliver practical, implementable improvements, not just reports.
Zerith supports:
Process and plant energy audits (compressed air, steam, heat recovery, motors, drives, and thermal systems)
Site-wide energy performance reviews aligned with ESOS and ISO 50001 principles
Energy “treasure hunts” and Kaizen-style workshops to unlock operational efficiencies
Data-led insights through our ZECO AI platform to track performance and prioritise actions
By working alongside your teams, we help manufacturers reduce energy costs, improve resilience, and support long-term decarbonisation—while building internal capability to drive continuous improvement.
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Yes. Energy audits are a core foundation of Zerith’s Net Zero planning approach.
We use audits to move beyond compliance and build a clear, evidence-based pathway to Net Zero. By analysing how energy is used across buildings, processes, and infrastructure, we identify practical carbon reduction opportunities, quantify their impact, and prioritise actions based on cost, risk, and deliverability.
Zerith energy audits support Net Zero planning by:
Establishing a robust energy and carbon baseline
Identifying short-, medium-, and long-term reduction measures
Linking operational improvements with capital investment planning
Informing heat decarbonisation, electrification, and efficiency strategies
Feeding directly into structured Net Zero roadmaps using our ZECO AI platform
The result is a Net Zero plan grounded in real data, real assets, and real operational insight—designed to be achievable, affordable, and aligned with your business objectives.
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As a building performance consultant, Zerith reviews all systems that influence energy use, carbon emissions, and operational performance—across both buildings and supporting infrastructure.
Our reviews typically include:
Heating, cooling, and ventilation systems (boilers, heat pumps, chillers, AHUs, fans)
Electrical systems (lighting, power distribution, motors, drives)
Building fabric (insulation, glazing, air tightness, thermal bridging)
Building Management Systems (BMS) and controls
Hot water and process-related loads
On-site generation and storage (solar PV, batteries, CHP where applicable)
Heat networks and distribution systems
Metering, sub-metering, and energy data quality
We assess not just design intent, but how systems actually perform in operation, identifying inefficiencies, control issues, and optimisation opportunities. This whole-system approach ensures recommendations are technically sound, commercially viable, and aligned with compliance, performance, and Net Zero objectives.
Speak to Our Team
If you’re looking to reduce energy costs, improve building performance, or prepare for upcoming compliance requirements, we’d be happy to discuss how Zerith can support your organisation.