In December 2025, the engineering team completed training in ASHRAE Standard 62.1, the ventilation standard for acceptable indoor air quality, strengthening support for international project specifications.
Ventilation standards such as ASHRAE 62.1 matter to a fan supplier because they translate a designer's required indoor air quality into concrete outdoor-air rates that must then become supply and exhaust duties, and a fan sized only on pressure can pass a mechanical test yet fail the air-quality specification. The standard's two paths, a prescriptive table and a performance calculation, also interact with energy goals, since more outdoor air improves air quality but raises heating and cooling loads, so competent selection balances the two instead of maximising one at the expense of the other. Training the team in the standard closes the gap between a Chinese-built product and an internationally written specification.
What ASHRAE 62.1 Controls
ASHRAE 62.1 sets minimum ventilation rates and procedures for commercial and institutional buildings, expressed through two paths: a prescriptive table of outdoor air rates per person and per floor area, and a performance path using calculated contaminant levels. For a fan supplier, fluency in the standard means being able to translate a designer's required outdoor-air fraction directly into supply and exhaust duties rather than guessing.
The standard matters most on tenders where the consulting engineer references it by name; a fan sized without regard to the required outdoor air may pass a pressure test yet fail the air-quality specification. In other words, the mechanical duty and the code duty are different questions, and both must be answered.
Training also covered how the standard's two paths interact with energy goals. More outdoor air improves air quality but raises cooling and heating loads, so competent selection balances the two instead of maximising one at the expense of the other.
How the Standard Drives Fan Duty
The training links code requirements to equipment selection, as outlined below with typical figures that vary by edition and occupancy.
| Space type | Outdoor air rate | Fan implication |
|---|---|---|
| Office | ~10 L/s per person | Supply + exhaust balance |
| Classroom | ~8 L/s per person | Higher ACH |
| Retail | ~0.6 L/s per m² | Area-based duty |
| Laboratory | High, local | Dedicated exhaust |
Because the standard uses both per-person and per-area components, total outdoor air scales with occupancy and floor area together, and the fan must deliver that sum plus internal and exhaust imbalances. A common error is using only one component, which under-ventilates the space relative to the code.
The exhaust side matters too. To admit outdoor air, the building must also remove a matching volume, so exhaust fan duty is set by the same calculation, not chosen independently.
Checklist for Code-Aligned Ventilation
Specifiers can apply this discipline when writing or reviewing a ventilation specification:
- State the standard: Reference ASHRAE 62.1 explicitly, including the edition, so the duty basis is unambiguous.
- Sum the components: Add per-person and per-area outdoor air, not one or the other, to get the true requirement.
- Balance supply/exhaust: Pressure relationship matters for contaminant control, so design the pair together.
- Size with margin: Filter loading reduces delivered flow over time, so include margin to hold the rate.
- Confirm with engineers: Validate duty against the cited code edition, because rates change between revisions.
- Document the basis: Keep the ventilation calculation with the project file for inspection and future upgrades.
Significance for International Work
Keruite exports fans to 50+ countries and, with 30+ years of manufacturing at its 80,000 m² Dezhou facility, the ASHRAE training closes the gap between a Chinese-built product and an internationally written specification. The ISO 9001:2015-certified operation can now better defend its selection against code-based tender requirements.
For global consultants, the practical gain is a supplier that speaks the same ventilation-standard language and can show how the quoted fan meets the cited rate. the company views such training as part of serving export markets where codes differ from the domestic baseline.
For specifiers, the practical discipline is to reference the standard and its edition explicitly, then sum both the per-person and per-area outdoor-air components rather than using one alone, because omitting a component under-ventilates the space relative to the code. Filter loading reduces delivered flow over time, so include margin to hold the rate, and confirm exhaust duty from the same calculation so the building can admit the outdoor air it supplies. With exports to 50+ countries, 30+ years of manufacturing at the 80,000 m² Dezhou facility, and an ISO 9001:2015-certified operation, the company can now defend its selection against code-based tender requirements in the cited edition.
The tension between indoor air quality and energy is where competent selection earns its keep, because adding outdoor air improves the occupied environment but also raises the heating and cooling load the system must carry, so the two goals cannot be pursued independently without wasting energy or compromising air quality. A team fluent in the standard can size the ventilation to meet the cited rate with margin for filter loading, while also advising where heat-recovery or demand-controlled ventilation can recover part of the energy penalty. For export projects written to international codes, that fluency means the quoted fan answers both the mechanical and the code question in the same submission, which shortens the tendering conversation.
Engineers in Dezhou respond to selection enquiries within 24 hours, and the factory ships most standard fans from its 80,000 m² site within agreed lead times.