Most commercial kitchens worldwide still use baffle or mesh filters — technology essentially unchanged since the 1950s. Retrofitting these systems to modern ESP does not necessarily require a full kitchen renovation. With proper planning, the conversion can be performed in days with minimal disruption.
| Parameter | Specification |
|---|---|
| Retrofit Feasibility Assessment | Check: existing hood dimensions (ESP module must fit), duct condition, electrical capacity (additional circuit may be needed for ESP), ceiling/structural support for additional weight |
| Typical Retrofit Process | 1. Site survey and measurements; 2. Off-site fabrication of adapter plates and brackets; 3. On-site installation (2-5 days per hood line); 4. Commissioning and staff training |
| Cost Comparison | Retrofit ESP: $8,000-15,000 per hood line vs New kitchen with ESP: included in build cost vs Ongoing baffle system cost: higher energy + maintenance |
| Disruption Management | Kitchen remains operational during retrofit (one hood section at a time); ESP commissioned during overnight/closed hours |
Application Scenarios
- 30-year-old restaurant retrofit (San Francisco): A family-owned Chinese restaurant operating since the 1990s with original baffle filters was spending $8,000/year on duct cleaning and receiving regular odor complaints from the residential units above. The retrofit to Souniny Light-duty Series ductless was completed over 3 days (Monday-Wednesday, restaurant closed). Total cost: $11,000. First year savings: $8,000 duct cleaning eliminated + $2,500 energy savings = payback in 13 months. Zero odor complaints since retrofit.
- Hotel kitchen phased retrofit (Dubai): A hotel with a 24-hour kitchen could not shut down for retrofit. The solution: phased retrofit over 4 weeks, one hood section per week during the lowest-demand period (3:00-6:00 AM). The ESP adapters were pre-fabricated off-site; on-site installation took 3 hours per section. Kitchen operation continued throughout. Total project cost was 30% higher than a full-shutdown retrofit but the hotel avoided approximately $200,000 in lost F&B revenue.
- Shopping mall food court retrofit (Manila): A mall food court with 12 tenant stalls retrofitted from centralized ducted baffle system to distributed ductless ESP. The existing common duct was abandoned in place (cost-prohibitive to remove). Each stall received an Light-duty Series ductless unit installed over a weekend. The project was completed in 6 weeks (3 weekends × 4 stalls). The mall’s facility manager reports that the abandoned duct has been sealed and poses no fire risk — confirmed by fire marshal inspection.
- Restaurant chain retrofit program: A 50-location chain implemented a systematic ESP retrofit program: 5 locations per quarter, prioritizing based on duct cleaning cost and complaint history. Standardized retrofit kit (pre-fabricated adapters, brackets, wiring harness) reduced per-location retrofit time from 5 days to 2 days. Standardized commissioning checklist ensured consistent performance. Program completed in 2.5 years. Corporate facilities reports 40% reduction in chain-wide kitchen maintenance costs.
