ERMI with Free HERTSMI 2

Ideal for baseline assessments, investigating mould contamination and pre/post-remediation testing.

The ERMI (Environmental Relative Mouldiness Index) is our most established dust-based mould assessment. It analyses settled dust to provide a broader picture of mould contamination within your indoor environment.

Unlike air sampling, which provides a snapshot of what is airborne at the time of testing, dust analysis can provide insight into mould that has accumulated within the property over time.

The ERMI analyses 26 water-damage indicator moulds and 10 common environmental moulds, helping to identify whether species associated with water-damaged buildings are present and at what levels.

Your test also includes a FREE HERTSMI-2 score, calculated from five specific mould species. HERTSMI-2 is commonly used alongside ERMI and may be particularly relevant for individuals investigating mould exposure in relation to CIRS (Chronic Inflammatory Response Syndrome).

Good choice if you want:

• A broad assessment of mould within a property
• To investigate suspected or historical water damage
• A baseline before remediation
• Pre/post-remediation comparison testing
• ERMI and HERTSMI-2 from the same dust sample

36 mould species are analysed using DNA-based testing: 26 water-damage indicator species and 10 common environmental species.

Species - As listed below:

Water Damage Moulds: Aspergillus Flavus/Oryzae, Aspergillus Fumigatus, Aspergillus Niger, Aspergillus Ochraceus, Aspergillus Penicilliodes, Aspergillus Restrictus, Aspergillus Sclerotiorum, Aspergillus Sydowii, Aspergillus Unguis, Aspergillus Versicolor, Aureobasidium Pullulans, Chaetomium Globosum, Cladosporium Sphaerospermum, Eurotium (Asp) Amstelodami, Paecilomyces Variotii, Penicillium Brevicompactum, Penicillium Corylophilum, Penicillium Crustosum, Penicillium Purpurogenum, Penicillium Spinulosum, Penicillium Variabile, Scopulariopsis Brevicaulis/Fusca, Scopulariopsis Chartarum, Strachybotrys Chartarum, Trichoderma Viride, Wallemia Sebi

Common Indoor Moulds: Alternia Alternata, Acremonium Strictum, Aspergillus Ustus, Cladosporium Cladosporoides1, Cladosporium Cladosporoides2, Cladosporium Herbarum, Epicoccum Nigrum, Mucor Amphibiorum, Penicillium Chrysogenum, Rhizopus Stolonifer

HERTSMI-2: Aspergillus Penicillioides, Aspergillus Versicolor, Chaetomium Globosum, Strachybotrys Chartarum, Wallemia Sebi

FREE HERTSMI-2 Score

Your HERTSMI-2 score is calculated using the results for:

Aspergillus penicillioides • Aspergillus versicolor • Chaetomium globosum • Stachybotrys chartarum • Wallemia sebi

Important: HERTSMI-2 does not require a separate sample — it is calculated from the same ERMI analysis.

Your kit contains everything required to collect and return your dust sample:

• Swiffer dust collection cloth
• Disposable gloves
• Sealable sample bag
• Step-by-step sampling instructions (accessible via order confirmation email)
• Laboratory Chain of Custody form (accessible via order confirmation email)
• Prepaid return label to Mould Lab (UK customers only)

HOW TO TAKE YOUR SAMPLE

Collect settled dust using the supplied Swiffer from approximately 10 suitable locations within the area you wish to test. Full step-by-step instructions are included with your kit.

For the best results

• Wear the supplied gloves when collecting your sample.
• We recommend using one Swiffer per room for the most accurate location-specific results.
• If your aim is simply to establish whether there is a mould problem within the property, one Swiffer may be used across multiple rooms.
• Prioritise rooms with known or suspected water damage, rooms that worsen symptoms, or rooms used most frequently.
  

Important

• One kit contains one Swiffer and therefore one laboratory sample.
• Do not cut the Swiffer, as this creates multiple samples which may incur additional laboratory charges.
• If several rooms are combined into one sample, the results cannot identify which individual room contains the mould.
  

When should I collect the sample?

If possible, clean the property first and allow 6–8 weeks for fresh dust to accumulate before sampling. This provides a good representation of the current environment.

However, this is not essential. Existing dust can still provide valuable information when investigating historical contamination, a recent water damage event, or when results are required sooner.

Full collection instructions are included with every kit.

HOW TO TAKE YOUR SAMPLE

Collect settled dust using the supplied Swiffer from approximately 10 suitable locations within the area you wish to test. Full step-by-step instructions are included with your kit.

For the best results

• 
  Wear the supplied gloves when collecting your sample.
  
• 
  We recommend using one Swiffer per room for the most accurate location-specific results.
  
• 
  If your aim is simply to establish whether there is a mould problem within the property, one Swiffer may be used across multiple rooms.
  
• 
  Prioritise rooms with known or suspected water damage, rooms that worsen symptoms, or rooms used most frequently.
  

Important

• 
  One kit contains one Swiffer and therefore one laboratory sample.
  
• 
  Do not cut the Swiffer, as this creates multiple samples which may incur additional laboratory charges.
  
• 
  If several rooms are combined into one sample, the results cannot identify which individual room contains the mould.
  

When should I collect the sample?

If possible, clean the property first and allow 6–8 weeks for fresh dust to accumulate before sampling. This provides a good representation of the current environment.

However, this is not essential. Existing dust can still provide valuable information when investigating historical contamination, a recent water damage event, or when results are required sooner.

Full collection instructions are included with every kit.