Comparing air purifier brands for a tender: a documented method
A tender shortlist needs a documented comparison method, not gut feel. See how to score brands on certifications and filtration stages transparently.
Key takeaways
- A documented scoring method protects a tender officer from a decision being challenged as arbitrary or brand-biased.
- Score certifications first, since they are the most objectively checkable part of any claim.
- Filtration grade and sterilisation stage should be scored separately, not lumped under one "medical-grade" label.
- Servicing and rental terms belong in the score for any business or institutional procurement, not just the product spec.
- Keep the scoring sheet on file so the final recommendation can be explained after the fact.
Why a shortlist needs a documented comparison method, not gut feel
Tender decisions get challenged, sometimes by an unsuccessful bidder, sometimes by an internal audit reviewing the procurement file after the fact. A shortlist built on general impressions, this brand feels more established, that one has a nicer product page, does not hold up well under that kind of scrutiny, and it leaves the officer with little to point to if asked why one brand was preferred over another.
A documented method fixes this by making the criteria explicit before any brand is scored, and applying the same criteria to every option on the shortlist. It also makes the process faster the next time a similar tender comes up, since the framework is already built.
Scoring brands on certifications and filtration stages first
Certifications are the most objectively checkable part of any brand's claims, so score them first. Check for an FDA Class 2 medical device listing, the specific HEPA grade, H13 captures at least 99.95 percent of particles down to 0.1 micron, and general certifications like CE, RoHS, ISO 9001 and ISO 14001. Request documentation for each rather than accepting a general assurance on a product page, and keep copies of whatever is supplied.
Score filtration and sterilisation separately rather than as one combined "medical-grade" line item. A unit with HEPA filtration but no active sterilisation stage, UV-C or ion release, scores differently from one that includes both, even if both use similar marketing language on their respective product pages.
Where servicing and rental terms factor into the score
For an institutional purchase, the product itself is only part of the decision. Ask what servicing is included, how filter and lamp replacement is handled, and whether flexible rental is available alongside outright purchase. Rental terms that bundle filters, servicing and two-way delivery into one rate are worth scoring as a distinct line item from the unit's technical specification, since they affect the total obligation over the contract period.
Coverage sizing belongs in this section too: confirm the brand's CADR figures against the room's floor area using a clean-air delivery rate calculation, rather than accepting a generic "suitable for offices" description without a specific figure attached to it.
Documenting the comparison for tender transparency
Build a simple scoring sheet with each brand as a row and each criterion, certification, filtration grade, sterilisation stage, coverage fit, servicing terms, as a column. Score each cell based on documented evidence, noting where a brand could not supply requested documentation. Keep this sheet on file alongside the tender submission, dated and attributed to whoever collected each piece of evidence.
This documentation matters most if the decision is ever questioned. A scoring sheet with dated evidence for each line is far more defensible than a memory of which brand seemed most credible during a sales call, and it also gives the next tender officer a starting template rather than a blank page.
Arriving at a defensible final recommendation
Once every brand on the shortlist is scored against the same criteria, the final recommendation should follow from the sheet rather than override it. If a lower-scoring brand is chosen for a specific reason, price, existing relationship, note that reason explicitly alongside the score rather than letting the scoring sheet quietly disagree with the final decision.
See our claims verification page for what documentation to request from any brand, including AIRE, and our clinic air purifier guide for how coverage sizing should factor into a healthcare-specific shortlist and its underlying air changes per hour targets.
Next step
See what documentation to request from any brand, and how to tell a verifiable certification from a general marketing claim, before scoring it on our claims verification page, and build it into your standard tender checklist.
Frequently asked
Why does a shortlist need a documented comparison method?
Tender decisions can be challenged by unsuccessful bidders or reviewed in an internal audit, and a shortlist built on general impressions does not hold up well under scrutiny. A documented method with explicit, consistently applied criteria makes the final recommendation defensible after the fact, and easier to explain to anyone who questions it.
What should be scored first when comparing brands for a tender?
Certifications should be scored first since they are the most objectively checkable part of any brand's claims. Check for a specific medical device listing, the exact HEPA grade, and general certifications like CE, RoHS and ISO, requesting documentation for each rather than accepting general marketing language at face value from a product page.
How is the comparison documented for tender transparency?
Build a scoring sheet with each brand as a row and each criterion as a column, scoring based on documented evidence and noting where a brand could not supply requested proof. Keep this sheet on file alongside the tender submission in case the decision is later questioned by a bidder or auditor.
Should servicing and rental terms factor into the score?
Yes, for any institutional or business procurement. What servicing is included, how filter replacement is handled, and whether flexible rental is available alongside purchase are all worth scoring as separate line items from the product's technical specification, since they affect the total commitment across the contract term.
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