| Item | Value |
|---|---|
| Rect. gauge (600×300 LP) | 24-ga galvanized |
| Large trunk (1500×900 MP) | 18-ga w/ cross-break stiffening |
| Longitudinal seam | Pittsburgh lock |
| Transverse joints | TDC or S-drive |
| Sealing (supply) | ULC-S110 mastic; Seal Class A |
| Sealing (return) | Seal Class B minimum |
| Trapeze hanger spacing | 2400 mm max (rect. ≤900 mm) |
| Insulation (uncond. space) | 50 mm FSK wrap; RSI 1.4 (R-8) |
| Flex duct max length | 1.5 m (diffuser neck only) |
| Sanctuary branch velocity | ≤ 5 m/s |
| Item | Spec |
|---|---|
| RTU curb level tolerance | ± 3 mm across diagonal |
| AHU housekeeping pad | 100 mm min. above fin. floor |
| Vibration isolators | All rotating equip.; spring + neoprene |
| Flex connectors (equip.) | ≥ 150 mm at supply & return |
| Condenser placement | Away from sanctuary walls & gathering areas |
| Type | Trigger | Testing Interval |
|---|---|---|
| Fire damper | Fusible link @ 74°C | After install + every 4 yrs (OFC) |
| Smoke damper | Fire alarm signal | Annually (OFC) |
| Combination F/S | Both methods | Annual (smoke) + 4-yr (fire) |
| Item | Spec |
|---|---|
| Sanctuary NC target | NC-25 to NC-30 |
| Min. independent zones | 4 (sanctuary, fellowship, offices, classrooms) |
| ERV effectiveness (min.) | 65% sensible at design heating |
| CO2 demand ventilation | Assembly spaces > 200 occ. |
| VFD fan energy savings | 50% speed = ~87.5% energy reduction |
| Setback (unoccupied) | 15°C heat / 30°C cool |
| Space | Rate / Requirement |
|---|---|
| Washrooms | 25 L/s per WC or 10 ACH |
| Parking garage | 7.5 L/s per m² (CO sensor modulated) |
| Kitchen (Type I hood) | ULC grease duct, 16-ga cont. weld, rated shaft |
| Mech room (gas equip.) | Cont. exhaust; interlock w/ gas firing |