protecfire — firespy PHANTOM®System Design Calculator · DIN EN 17446:2021
v9.3
Project information
Project details
Validity period shown on the PDF report
Step 1 — Kitchen hood type
Wall hood
Hood against a wall. Single pipe runs the hood length. Grease channel(s) on one side.
Central / island hood
Suspended hood, open both sides. Pipe enters via lateral T-piece, runs U-shape. Cooking nozzles on both sides; detectors shared at centre.
Ventilated ceiling
Nozzles embedded in ceiling panels with bulkhead adapters. Covers cooking zone by area or appliance. Always P2.
Step 2 — Protection strategy
Area protection (linear)
Nozzles every 350 mm along hood or ceiling plenum length, covering all appliances below.
Protection by appliance
Dedicated nozzle(s) per cooking appliance type and size.
Step 3 — Installation type
Surface mounted
Pipe runs visibly inside the hood or ceiling, fixed with tube supports on stud-welded threaded pins. Standard — economical, easy to maintain.
Concealed (flush)
Pipe hidden inside panel or plenum. Nozzles flush-mounted with bulkhead adapters — fixed, directional or glass panel. Premium finish for show kitchens and ventilated ceilings.
Step 4 — Hood dimensions & routing
Hood dimensions
Main dimension — pipe runs along this length
Reference only
Reference only — depth of protected zone (for documentation)
Ventilated ceiling: ceiling height − appliance height (typically 85–90 cm). Max 260 cm for P2.
Pipe run from container to hood wall/ceiling entry
8×1 control tube from container to manual release
Step 5 — Cooking zone
Area protection — nozzle layout
Appliance list
Per §6.1–6.5 of DIN EN 17446:2021. Nozzle count determined by appliance type and height above surface.
Step 6 — SPY detectors & temperatures
SPY detector configuration
Auto-calculated based on protection mode, hood length and ducts. Minimum 2 per system. Adjust upward if additional monitoring points are required.
SPY over deep fryers1 per deep fryer — highest heat concentration. Not adjustable.
0
Suggested: 0
1 per duct — suggested: 0
Total SPY detectors—
Step 7 — Grease channel(s)
Grease channel configuration
1 nozzle P2 per 2 metres of channel length. Wall hood: typically 1 channel. Central hood: typically 2 channels (one per side).
Step 8 — Exhaust ducts & separators
Exhaust air ducts
Per §6.8/6.9: 2× P2 per duct. Max rect. perimeter 1800 mm (0.18 m²). Max round Ø573 mm (0.26 m²). Ventilation shuts off immediately on alarm.
Grease / aerosol separators
1× P2 per 2000 mm. Ventilation shuts off on alarm.
Step 9 — Manual release & pressure switches
Manual Release & Pressure Switch Configuration
Step 10 — Pipe calculation & adjustments
Automatic pipe calculation
Fittings
Main line 12×1 (m)Auto-calculated — adjust if needed
Detection line 8×1 (m)firespy only — SPY detectors
MR line 8×1 (m)Container → manual release
90° bendsAuto-estimated
T-piecesAuto-estimated
Bulkhead fittings
Bulkhead size(s):
Nozzle bulkhead fittings
Installed at each nozzle position — receives pipe on one side, nozzle on the other. Auto-filled with cooking zone nozzle count.
Nozzle bulkhead fittingFixed nozzle, pointing down (auto = cookNoz)
Directional nozzle bulkheadOrientable nozzle — replaces fixed as needed
⚠ Please complete the following before calculating:
Review all steps above, then generate your system design
—
—
Container(s)—config
Total nozzles—units
Cooking nozzles—units
GC nozzles—units
SPY detectors—elements
System type—
Nozzle allocation by zone
Total → litres required → container selection—
Bill of materials — firespy PHANTOM®DIN EN 17446:2021 · doc.1001601 v03 · 07.04.2026
Item
Description
Qty
Ref.
System diagram — elevation view (schematic)Not to scale · auto-generated from calculated values
System diagram — top view / plan (schematic)Not to scale · auto-generated from calculated values
Note: This calculation is based on the firespy PHANTOM® design guidelines (document 1001601 v03, 07/04/2026) and DIN EN 17446:2021. Final design must be validated and commissioned by a certified protecfire installer. Pipe lengths are auto-estimated — on-site survey required. Energy supply shut-off (electrical, gas, compressed air) must be commissioned separately by a qualified contractor.
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