Healthy Indoor Air Certificate

Healthy Indoor Air Certification Programme – Detailed Technical Specifications and Terms


Our Healthy Indoor Air Certification Programme delivers a comprehensive, performance-based evaluation of Indoor Environmental Quality (IEQ) and Indoor Air Quality (IAQ). Utilising advanced multi-parameter monitoring, assessments quantify key pollutants and comfort indices, including carbon dioxide (CO₂) (as a surrogate for ventilation efficacy and occupancy density), fine particulate matter (PM₂.₅ and PM₁₀), total volatile organic compounds (TVOCs), formaldehyde (HCHO), relative humidity (RH), ambient temperature, and additional contaminants where relevant. Protocols are informed by recognised industry benchmarks such as ANSI/ASHRAE Standard 62.1 (Ventilation for Acceptable Indoor Air Quality), WELL Building Standard air features, RESET Air performance targets, and WHO guidelines on indoor pollutants, aimed at mitigating risks of Sick Building Syndrome (SBS), enhancing thermal comfort, and promoting occupant health, cognitive performance, and productivity.



1. Healthy Indoor Air Certificate (Standard Commercial) – Complimentary Baseline IAQ Assessment

Single-site commercial operations qualify for a complimentary baseline IAQ assessment. This protocol employs non-invasive, real-time sensor deployment in public-accessible zones (e.g., customer-facing retail or assembly areas), benchmarking against Good to Very Good thresholds on our calibrated rating matrix, which incorporates percentile-based performance banding aligned with RESET Air and WELL prerequisites.

Eligibility Criteria and Scope Limitations:

  • Maximum gross internal floor area (GIA): 3,000 square feet
  • Sampling restricted to regularly occupied public zones; excludes back-of-house, staff-only, or restricted areas to focus on occupant exposure pathways
  • Excludes in-depth diagnostic analysis of HVAC systems (e.g., air handling units, ductwork integrity), combustion appliances, electrical installations, or mechanical emission sources
  • Multi-parameter spot and short-term averaging sampling evaluates ventilation rates (via CO₂ proxy), particulate loading, TVOC profiles, thermal comfort indices (PMV/PPD equivalents), and humidity-mediated microbial risk

Qualifying entities achieving Good or Very Good classification may elect optional certification deliverables: an A4 archival-grade certificate and high-visibility adhesive decal for premises display, substantiating elevated IAQ performance and facilitating marketing of health-focused credentials to stakeholders.

  • Promotional certification tariff: £85.00 (exclusive to qualifying assessments)
  • Certification validity: 6 months from issuance date
  • Ongoing compliance recommended via periodic re-assessment: £120.00 (encompassing repeat sampling, data analytics, and refreshed credentials)

Applicable Sectors and Performance Targets:

  • Standard retail, foodservice, hospitality, and assembly venues: Target Good–Very Good (reflecting typical occupancy and low-emission profiles)
  • High-emission sectors (e.g., personal care salons with chemical product usage, specialised storage, or non-standard retail): Baseline target Good (accounting for elevated TVOC source apportionment)

Procedural and Reporting Protocols:

  • Comprehensive IAQ data dossier (including raw metrics, trend analysis, and compliance summary) disseminated electronically within 7 working days
  • Certification election window: 7 days post-report delivery
  • Settlement terms: Immediate upon certification procurement; instantaneous issuance of fiscal receipt and digital/physical credentials
  • No mandatory acquisition post-assessment – fully elective

2. Healthy Indoor Air Certificate (Corporate/Multi-Site Portfolio)

Scalable protocol for multi-location enterprises, chains, franchises, or corporate estates. Standardised methodology ensures cross-site comparability without complimentary assessment.

  • Performance benchmarks: Good–Very Good (low-emission sectors); Good (elevated source sectors)
  • Excellent tier pursuit requires extended monitoring regimes, source identification, and potential airflow mapping
  • Portfolio-specific discounted pricing structures – bespoke quotation upon submission of site inventory

Pre-assessment scoping essential: enquiries@healthy-indoor-air.co.uk

3. Healthy Home Indoor Air Certificate (Residential)

Fee-based residential evaluations, tiered by property typology and scale to account for variable exposure durations and source profiles.

  • Level 1 (compact dwellings: studios, apartments, maisonettes ≤3 bedrooms): £120.00 (full protocol + certification; 6-month validity)
  • Level 2 (standard family residences ≤4 bedrooms or oversized apartments): £180.00
  • Level 3 (larger estates 5–7 bedrooms): £320.00

Atypical configurations or developer bulk programmes: Tailored tariffs following detailed specification review.

4. Healthy Stay Indoor Air Certificate (Short-Term Rental & Hospitality)

Per-room modular pricing for transient occupancy properties.

  • Tariff: £35.00 average per habitable zone
  • Minimum deployment: 3 rooms per visit for operational efficiency
  • Augmented protocol incorporates mechanical ventilation efficacy (e.g., bathroom extraction rates, air conditioning filtration), alongside core IAQ suite
  • A4 certification artefact provided; periodic re-validation advised at 6-month intervals (or accelerated to quarterly upon detection of anomalies)

5. Healthy Work-Space Indoor Air Certificate (Occupational Environments)

Customised for staff-dominant zones, integrating advanced diagnostics of occupational emission contributors.

  • Reference pricing: £280.00 per floor level (up to ~5,000 sq ft, encompassing partitioned offices, ancillary spaces, kitchens, and sanitary facilities)
  • Includes evaluation of equipment-derived pollutants and evidence-based mitigation recommendations
  • Complex or multi-floor layouts necessitate preliminary consultation and site survey

6. Healthy Home PRO Certificate (Landlord & Managed Rental Portfolio)

Advanced data-intensive protocol with prognostic modelling for tenancy management.

  • 3–5 bedroom units: £285.00 per evaluation
  • 1–3 bedroom units: £235.00 per evaluation
  • Deliverables: Granular quantitative analytics, remedial prioritisation, predictive risk forecasting, and tenant-facing guidance documentation
  • Recommended cadence: 6 months (or event-triggered based on threshold exceedances)

Pre-engagement consultation mandatory for protocol optimisation.

General Terms and Governance

  • Enquiry triage: Indicate preferred certification variant for streamlined departmental routing
  • B2B fiscal terms: Net 14 days from invoice date
  • Complimentary assessments + elective certification: Settlement contemporaneous with procurement
  • Consumer-facing residential services: Subject to full statutory consumer protection frameworks

Our programme prioritises scientific rigour, actionable insights, and continuous improvement in Indoor Environmental Quality. To commence scoping, scheduling, or bespoke consultation, contact: enquiries@healthy-indoor-air.co.uk