LDD-07 · Cooking + Island Ventilation
One-line intent
High-performance cooking with induction + removable BBQ plates, an air-curtain plume containment plane, an oversized recessed ceiling capture field, a remote quiet exhaust blower, and a diffused luminous light panel disguising the mechanical function — all instead of a hanging hood.Why this matters
The single most ambitious piece of the project and the highest-performance-risk item in the LDD set. Visual goal is correct (no hanging hood); engineering bar is higher than the LDD currently acknowledges.
Cooking layout
| Zone | System | Use |
|---|---|---|
| Center (cook-biased) | Bridge-zone induction + removable plates | Korean BBQ · teppanyaki · griddle |
| East | 4-burner induction | Pots, pans, everyday |
Ventilation strategy (locked design intent)
- Air curtain at counter front, tunable, gentle controlled airflow (containment, not exhaust)
- Ceiling capture field LOCKED at 8' AFF (per builder), +18 to 24" beyond cooking footprint. With 36" cooktop, that's 4'-6" clearance above cooking surface — generous for a recessed oversized capture.
- Vent + light hybrid: perimeter slot intake (~1–2") around central diffused light panel (2700K, 90+ CRI)
- Remote inline blower near east exterior wall
Open items (large)
- Required CFM at chosen capture height
- Perimeter slot sizing
- Air curtain slot velocity (avoid turbulence)
- Make-up air requirement — at 800–1,500+ CFM, mandatory in most jurisdictions
- Grease filtration + cleaning regimen
- Acoustic performance of remote blower
- Interaction with HVAC supply air + adjacent fans
- Service access for light panel, plenum, filters
Cost drivers
Custom recessed ceiling capture + plenum $15–30K · Air curtain $3–8K · Remote blower + ducting $7–15K · Make-up air system $3–12K · Diffused light panel $2–6K · Induction cooktop + plates $6–14K · Hood specialist $3–8K. Total: $50–100K, skewed high due to custom integration.Air-gap concerns (this LDD has the most concentrated risk)
- Korean BBQ generates serious grease aerosol, not just smoke. Recessed plenum needs grease catchment + drip pan + cleaning access.
- Air curtain is a 5–10% performance trick, not 50%. Don't treat as load-bearing.
- 8' AFF capture height is reasonable, with caveats (revised). At 4'-6" above cooktop with an oversized recessed field, capture efficiency for high-smoke cooking is plausibly 65–80%. For Korean BBQ, the air-curtain + oversized field + remote blower combination still needs real CFM design.
- No mention of grease classification. Code may classify as Type I commercial appliance.
- Make-up air at 1,200+ CFM in tight envelope is a major item. Tempered MUA recommended.
- Performance failure mode is invisible until move-in. Build a mockup before signoff.
- Service access for filters/plenum must be specified, not "preferred."
Cross-references
→ Outputs to
LDD-06 make-up air · LDD-12 ceilings exception · LDD-20 counter integration · LDD-08 light panel← Inputs from
vent section diagram
Diagram
Section through the island system showing all components and the airflow strategy.