Metal kitchen hood following an Indoor Air Quality Assessment

Indoor Air Quality Assessment

As part of our air hygiene services, H2O Hygiene provides Indoor Air Quality Risk Assessments that identify possible pollutants in your commercial premises, followed by recommended remedial action to ensure full compliance, comfort and safety. Breathe easy with the help of H2O Hygiene, here to assess and improve your indoor air quality.

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  • On-site monitoring and sampling
  • Indoor Air Quality Assessment tailored for your business
  • Professional solutions from a qualified and supportive team
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    Certifications & Accreditations

    The CHAS company logoA purple and light blue WaterSafe logoThe BSRIA members logo in colourAPHC licensed member logo in blue and whtieThe British Assessment Bureau UKAS management systems ISO 14001 enviromental management logoThe UKAS management systems ISO 45001 health and safety management accreditation logo from the British Assessment BureauThe British Assessment Bureau ISO 9001 Quality Management accreditation logo

    Our Indoor Air Quality Assessment Process

    • 01. 1. Initial Consultation
      By consulting with you, we’ll get an understanding of your premises and will build a complete picture of your HVAC systems and any other equipment that is a potential source of poor indoor air quality. From there, we perform a site survey and create a tailored Indoor Air Quality Assessment checklist.
      Indoor Air Quality Test on a HVAC System
    • 02. 2. On-Site Monitoring and Sampling
      Our highly qualified engineers will visit your site to carry out an inspection or clean and test, based on our initial consultation. Using advanced equipment, we calibrate air monitoring instruments to record pollutant levels and ventilation performance. We then assess pollutants including carbon dioxide (CO2), carbon monoxide (CO) and other Volatile Organic Compounds (VOCs), to ensure they are at safe and compliant levels. We perform sampling in key areas and across all systems, as well as monitoring humidity.
      Indoor Air Quality Testing on a commercial hvac system
    • 03. 3. Data Analysis and Benchmarking
      Poor indoor air quality can be caused by several factors. Our experts identify the root causes, whether it’s blocked filters, inadequate ventilation or external pollution sources. Our years of expertise and fine-tuned processes help us to identify trends and patterns in your premises that lead to poor air quality. All results are compared to the standards set by HSE guidelines, Workplace Exposure Limits (WELs) and World Health Organisation (WHO) thresholds.
      Commercial Indoor Air Quality Assessment
    • 04. 4. Reporting and Recommendations
      Following testing, sampling and data analysis, we write up a full report for your records and run through any analysis or testing results. This may also include recommendations for remedial action on any issues we identify. This can include solutions such as an improved maintenance plan for ventilation systems, upgrades and practical steps to take. All reports are clear, detail all test results and show photo evidence, making them ideal for compliance evidence during internal audits and HSE inspections.
      Commercial Indoor Air Quality Assessments
    • 05. 5. Creation of An Action Plan and Support
      We create bespoke action plans that outline short and long-term improvements to create a safer and more comfortable indoor environment. We work in partnership with our clients to deliver tailored maintenance plans, guiding your staff with training on air quality or providing ongoing Indoor Air Quality Risk Assessments.
      Commercial Indoor Air Quality Testing

    What is an Indoor Air Quality Assessment?

    An indoor air quality (IAQ) assessment is performed to establish which pollutants are present in an indoor space and how they might affect health and well-being.

    Our engineers will gather air samples to assess occupational exposure to harmful air pollutants and VOCs, analyse the performance and condition of building ventilation systems, assess compliance with building regulations and identify the potential cause of any issues reported.

    Indoor air quality can be affected by several factors, including ventilation systems such as ductwork and extraction units, the building’s infrastructure, working conditions and temperature and humidity.

    During the assessment, testing for pollutants such as CO2, CO, NO2, Particulate Matter (PM) and a range of VOCs is carried out to identify safe levels. The assessment is crucial to ensure that adverse health effects from exposure to poor indoor air quality are mitigated.

    Why Choose H2O Hygiene?

    Partnering with H2O Hygiene for Indoor Air Quality Risk Assessment services is the smart way to stay compliant and keep your people safe. As part of our nationwide air hygiene services, our Indoor Air Quality Assessments are performed by a team that truly cares. We put customer service at the forefront of everything we do, with our team arriving on time, ready to get to work and support you in any way we can.

    Our detailed reports set you on the right track to have indoor conditions that are healthy, comfortable and compliant, as we’ll outline any issues we find with recommendations for remedial work that are sustainable and cost-effective. Our fully trained and certified team will be by your side throughout the entire process.

    H2O Hygiene isn’t just here to help you in the short-term; we’re here to provide an Indoor Air Quality Assessment checklist that helps you keep your premises safe and compliant for the long-term.

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    Key Benefits of Indoor Air Quality Assessments

    • 1. Protect Health and Wellbeing
      Whether occupants in your building are in perfect health or suffer from conditions that are severely affected by air pollutants, an assessment will identify risks that can cause harm to your people. Different pollutants and VOCs can trigger allergies and asthma attacks, as well as cause several health effects, like irritation of the eyes, headaches and fatigue. We help keep your premises in a stable condition to ensure everyone can work in safe conditions.
    • 2. Ensure Legal and Regulatory Compliance
      An Indoor Air Quality Assessment can help you meet your obligations under COSHH Regulations and HSE requirements. Data collected over decades has outlined that exposure to indoor air pollutants could have greater significance on human health than outdoor air. The assessment can help to keep your business and property legally compliant with building certification schemes.
    • 3. Improve Productivity
      Ensuring your indoor air quality is clean and safe is a sure bet to improve performance amongst your workforce. Benefit from fewer sick days and reduced staff turnover. Employees will have a boost in concentration and performance, and they’ll know they can come into work without the worry of allergies or other health conditions being triggered.
    • 4. Optimise Ventilation and Building Performance
      We detect underperforming HVAC systems, blocked filters, ventilation gaps and other systems that could be causing poor indoor air quality. Optimising your systems ensures safer working conditions, healthier environments and can extend the lifespan of your systems. This can reduce costs for your business.
    • 5. Enhance Reputation and Corporate Responsibility
      Having the reports and data to showcase safe air quality in your premises demonstrates to governing bodies and inspectors that your business has a positive track record and supports ESG (Environmental, Social, and Governance) standards and sustainability initiatives with measurable improvements.
    • 6. Actionable Insights and Peace of Mind
      Professional air quality assessments and testing from H2O Hygiene give you data you can rely on. Each assessment comes with tailored recommendations and clear steps to improve indoor air quality, and our qualified team are on hand for any guidance you require. Indoor Air Quality Risk Assessments give you peace of mind and ensure any early warning signs of risks are dealt with as soon as possible.

    Download Your Free Legionella Risk Assessment Guide

    Essential insights, compliance checklists, and expert tips—straight from accredited specialists.

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    Got a Question?

    Frequently Asked Questions

    Poor indoor air quality can affect your team’s health, comfort and productivity. It may lead to headaches, fatigue, respiratory irritation or longer-term health issues. Maintaining clean air supports wellbeing, reduces absenteeism and helps businesses meet health and safety standards.

    An Indoor Air Quality Risk Assessment measures levels of pollutants such as carbon dioxide (CO2), carbon monoxide (CO), volatile organic compounds (VOCs), particulate matter, and humidity and temperature. The type of VOCs and pollutants measured can be determined by the indoor environment and systems in place. It helps identify ventilation or contamination issues that may impact occupants’ health.

    In alignment with Building Regulations Approved Document F, which mandates that ventilation must be capable of limiting indoor pollutants to protect health, it is industry best practice to conduct an Indoor Air Quality Assessment at least annually, or more often if there are complaints, new ventilation systems or significant changes in occupancy. Regular monitoring, testing and sampling as part of the assessment helps ensure compliance with HSE guidance, COSHH regulations, building standards and maintains a healthy environment.

    Typically, a standard Indoor Air Quality Assessment takes between 2-4 hours, depending on the number of monitoring points. We perform a site survey after consultation to identify the scale of the assessment, outlining factors such as building size, layout and number of monitoring points required.

    H2O Hygiene prioritises each of our clients’ needs and will conduct our assessments to make sure your business can run as normal. Our equipment is placed discreetly, and testing can be performed during normal working hours with minimal disruption.

    If our reports find any issues, we will recommend corrective actions such as improved ventilation, filter changes or source control. Follow-up testing can confirm improvements once remedial measures are in place. Rest assured, if we do find any issues, we know exactly what to do to fix them.

    UK employers must provide a safe working environment under the Health and Safety at Work Act 1974. Regular air quality assessments demonstrate compliance with HSE guidance on ventilation and workplace welfare.

    Assessments are recommended for new and existing buildings of all types, including commercial, retail, education and healthcare, or any indoor space where people spend extended periods. They are particularly useful for employers, landlords and facilities managers responsible for occupant health and safety.

    Our Reviews

    What Our Clients Say

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    Aurora Dental profile picture
    Aurora Dental
    119 days ago
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Mick Burton from H2O Hygiene came to fix a leaking AC unit, which turned out to be a bigger job than we initially thought. Despite the additional work required, Mick provided great service and responded quickly. Thank you, Mick!
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    Field Fayre Products Ltd
    133 days ago
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    H20 Hygiene have recently serviced our Office Air Conditioning Unit. The engineer was very professional and courteous. It has done the job ready for the summer!! We will be using them again in the future. Thank you Laura for sorting.
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    Graham Griffiths profile picture
    Graham Griffiths
    1211 days ago
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    Its a pleasure to work with H2o, always there for advice when needed, Great bunch of professional guys who take pride in their work. Nothing is too much trouble
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    Jack Windsor profile picture
    Jack Windsor
    1211 days ago
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    H2O were extremely quick to respond to my legionella risk assessment enquiry and the whole team were friendly throughout the whole process. A great company to work with!
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    Julie Prendergast profile picture
    Julie Prendergast
    1212 days ago
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    Each time i use H2O Hygiene, its always a quick and efficient service. The personnel are really friendly. Would definitely recommend !!
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    Lesley Hubbard profile picture
    Lesley Hubbard
    1212 days ago
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    H2O have been working with our care homes for a while now. We are really pleased with their customer services. Their staff are reliable, friendly and very helpful. We thoroughly recommend this company.
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    Sukvinder Basra profile picture
    Sukvinder Basra
    1212 days ago
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    Cannot fault this company, professional , courteous and great value for money
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    Scott Cox profile picture
    Scott Cox
    1212 days ago
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    I have used H20 Hygiene since their creation and cannot fault their service! Their knowledge of the industry is second to none, their costs are extremely competitive and their customer service is exceptional. I used other contractors before H20 Hygiene but only because their MD Tom Davenport worked for them as it was he who delivered the excellent service for those company. I have, whenever I have changed companies, ensured that I get H20 Hygiene set up on the system as I can then confidently hand over the legionella part of my contract to them happy in the knowledge that this will be maintained to an exceptionally high standard!. Cannot recommend these guys highly enough! Scott Cox Contracts Manager
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    Mark Wadhams profile picture
    Mark Wadhams
    2521 days ago
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    Excellent professional service and knowledgeable staff - would recommend without hesitation.
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    Stuart Tiley profile picture
    Stuart Tiley
    2955 days ago
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    These guys know what they are doing so look them up!!