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Method ledger
How YardVerdict scores greenhouse ventilations
Each product on the greenhouse ventilations scorecard gets one 0–100 score from the weighted formula below, computed only from published manufacturer specs and dated retailer records; we do not physically test products. The current table covers 20 products across 9 recorded spec fields, refreshed July 2, 2026.
- Scale
- 0-100
- Products
- 20
- Fields
- 9
- Updated
- July 2, 2026
The weights
| Dimension | Weight | Definition | Data source |
|---|---|---|---|
| Cfm | 16% | Listed cfm runs from 141 to 1,604 across the scored catalog; higher numbers score better, and unlisted values score neutral. | Cfm |
| Wattage | 14% | The scored range for listed wattage spans 18 to 186; lower numbers score better, with missing values held neutral. | Wattage |
| Duct Diameter Inches | 13% | Across the catalog, listed duct diameter inches goes from 4 to 12; higher numbers score better, while a missing entry stays neutral. | Duct Diameter Inches |
| Noise | 12% | Listed noise runs from 28 dB to 62 dB across the scored catalog; lower numbers score better, and unlisted values score neutral. | Noise |
| Speed Settings | 11% | Published listings put speed settings between 3 to 10; higher numbers score better, and a missing value stays neutral. | Speed Settings |
| Controller Included | 10% | This dimension checks whether controller included is listed; yes earns full credit, while no or missing earns zero. | Controller Included |
| Dimensions Inches | 9% | The dimensions inches scale runs from 11.1x12.8 to 8.8x6.3x8.9; entries nearer 8.8x6.3x8.9 earn the most credit, while unlisted ones stay neutral. | Dimensions Inches |
| Mixed Flow | 8% | The mixed flow score is binary: a listed yes earns full marks, while a no or a missing listing earns zero. | Mixed Flow |
| Pwm Control | 7% | The pwm control score is binary: a listed yes earns full marks, while a no or a missing listing earns zero. | Pwm Control |
| Total | 100% | All dimensions above sum to the full score. | Published score total |
- #1 AC Infinity CLOUDLINE S8 Quiet Inline Fan with Speed75/100Speed Settings 11 pts, Controller Included 10 pts, Wattage 9 pts
- #2 AC Infinity CLOUDLINE S6 Quiet Inline Fan with Speed73/100Wattage 12 pts, Speed Settings 11 pts, Noise 11 pts
- #3 AC Infinity CLOUDLINE A6 Quiet Inline Duct Fan72/100Wattage 13 pts, Speed Settings 11 pts, Controller Included 10 pts
- #4 AC Infinity CLOUDLINE S10 Quiet Inline Fan71/100Cfm 12 pts, Speed Settings 11 pts, Controller Included 10 pts
- #5 Vivosun AeroZesh T671/100Wattage 13 pts, Speed Settings 11 pts, Noise 11 pts
| Product | Composite | Cfm | Wattage | Duct Diameter Inches | Noise | Speed Settings | Controller Included | Dimensions Inches | Mixed Flow | Pwm Control |
|---|---|---|---|---|---|---|---|---|---|---|
| AC Infinity CLOUDLINE S8 Quiet Inline Fan with Speed | 75/100 | 7.3 points from grade 0.46 | 9 points from grade 0.64 | 6.5 points from grade 0.5 | 8.1 points from grade 0.68 | 11 points from grade 1 | 10 points from grade 1 | 8.5 points from grade 0.94 | 8 points from grade 1 | 7 points from grade 1 |
| AC Infinity CLOUDLINE S6 Quiet Inline Fan with Speed | 73/100 | 2.9 points from grade 0.18 | 12.3 points from grade 0.88 | 3.3 points from grade 0.25 | 10.6 points from grade 0.88 | 11 points from grade 1 | 10 points from grade 1 | 7.9 points from grade 0.88 | 8 points from grade 1 | 7 points from grade 1 |
| AC Infinity CLOUDLINE A6 Quiet Inline Duct Fan | 72/100 | 2.3 points from grade 0.14 | 12.6 points from grade 0.9 | 3.3 points from grade 0.25 | 9.9 points from grade 0.82 | 11 points from grade 1 | 10 points from grade 1 | 7.9 points from grade 0.88 | 8 points from grade 1 | 7 points from grade 1 |
| AC Infinity CLOUDLINE S10 Quiet Inline Fan | 71/100 | 11.6 points from grade 0.72 | 4.2 points from grade 0.3 | 9.8 points from grade 0.75 | 4.9 points from grade 0.41 | 11 points from grade 1 | 10 points from grade 1 | 4.5 points from grade 0.5 | 8 points from grade 1 | 7 points from grade 1 |
| Vivosun AeroZesh T6 | 71/100 | 2.9 points from grade 0.18 | 12.6 points from grade 0.9 | 3.3 points from grade 0.25 | 10.6 points from grade 0.88 | 11 points from grade 1 | 10 points from grade 1 | 5.3 points from grade 0.59 | 8 points from grade 1 | 7 points from grade 1 |
What the score bands mean
Score bands80+ strong60–79 solidBelow 60 limited fit
- 80+: strong marks on the heaviest dimensions with few weak lines in the listed specs.
- 60–79: competitive on most scored inputs, with at least one clearly weaker dimension.
- Below 60: trails this field on the inputs weighted most; the product cards list exactly where.
Source hierarchy
Published manufacturer specifications rank first, dated retailer records second; marketing claims without a checkable figure are excluded from scoring. Missing values never earn invented numbers; they are labeled “not listed - neutral 50” and take the neutral 50 grade the weight definitions describe.
- AC Infinity
- Vivosun
- TerraBloom
- Can-Filters
- VEVOR
- Hydrobuilder
- Wayfair
- Scored product catalog
Retrieved · Built
- AC Infinity2026-07-02Source record
- Can-Filters2026-07-02Source record
- Hydrobuilder2026-07-02Source record
- Scored product catalog2026-07-02Source record
- TerraBloom2026-07-02Source record
Update history
- Rankings rebuilt from the refreshed catalog: 20 greenhouse ventilations re-scored on 9 published spec fields, cfm first.