| Footprint | 9.5 m × 4.0 m = 38 m² |
| Acoustic enclosure height | 2.8 m |
| Construction | Factory-built steel-framed acoustic shell, insulated panels |
| Fabrication location | LE Technology Centre · Kidderminster, Worcestershire |
| Heat output | 550 kW primary |
| Refrigerant | R744 (CO₂) · GWP 1 · F-gas register entry required |
| sCOP target | 4.64 – 4.95 (sCOP 4+ as standard) |
| Flow / return circuits | 50 °C (space + AHU) + 75 °C (DHW + pool) · 90 °C peak available |
| Chilled circuit (optional) | + "free" cooling to studios, gym, soft play if specified at order |
| Acoustic rating | ≤ 35 dB(A) at 5 m boundary (factory tested) |
| Cladding | Per S24-2106 condition 3 (planning-approved finish) |
| ⚡ DNO supply to pod | 525 kVA · TBC |
| 🔥 75 °C circuit (DHW + pool) | DN50 · 8 m |
| 🌡️ 50 °C circuit (space + AHU) | DN50 · 8 m |
| 📡 BMS data run | CAT6 · 8 m |
| 💧 Condensate drain | 110 mm · 4 m |
| 🔵 Chilled circuit (if upgrade) | + DN40 · 8 m |
| Gas (boilers + DHW removed) | −2,799,021 kWh |
| Electricity (pod input) | +528,704 kWh |
| Pod aux loads | +12,400 kWh |
| PV (S24-1467) offset | −94,000 kWh |
| Net energy Δ | −2,351,917 kWh |
| Annual gas £ saved | −£164,991 |
| Annual elec £ extra | +£103,630 |
| Net £ saving / yr | −£61,361 |
| Direct (gas) tCO₂ | −511.9 |
| Indirect (elec) tCO₂ | +109.5 |
| Annual operational Δ | −402.4 tCO₂ |
| % reduction | −72% |
| Pod embodied (one-off) | +18.6 tCO₂e |
| Boiler / pipe disposal | +3.2 tCO₂e |
| Carbon payback | ~3 weeks |
| Knock-on | Trigger | Status | Action |
|---|---|---|---|
| DNO supply capacity | 525 kVA confirmed required to support pod electrical input + existing site demand | DNO surgery booked Apr 2026 | NPg quotation in progress; if < 525 kVA, fall back to 425 kW pod + 4 m³ thermal store |
| Gas plant decommissioning | 2× Hoval boilers + Andrews calorifier must be physically removed by 31 Mar 2028 (PSDS condition) | Programmed for week-13 | Flue stack removal, pipework cut and capped, gas supply isolated at MPRN — sequenced as Phase 3 of cutover |
| R744 (CO₂) F-gas register | EC Regulation 517/2014 leak detection + annual servicing obligations | Designed in | Pod ships with factory-fitted leak detection; LE 10-year service contract included |
| Plant room re-use | ~24 m² of internal space freed once boilers + calorifier removed | SKDC decision pending | Options: storage, BMS rack relocation, future battery storage; deferred to post-commission |
| Biodiversity net gain | S24-2106 condition 7 · habitat offset for 38 m² external footprint | Approved offset | Wildflower planting + bird boxes on west elevation; ecologist sign-off Mar 2025 |
| Operator R744 awareness training | 1Life maintenance staff need familiarity with CO₂ refrigerant systems | Booked Q4 2027 | 2-day module from LE Technology Centre; pre-commission delivery |
| S24-1467 PV commissioning | PV must be live before pod commissioning to validate net electrical load | Sep 2026 | PV sequenced ahead of pod; net-load model verified before PSDS award draw-down |
| Scenario | Type | Days |
|---|---|---|
| Pool covers | None (overnight install) | 0 |
| LED relighting | Out-of-hours, zone by zone | 0 |
| Solar PV | Roof access only | 0 |
| AHU controls | Overnight commissioning | 0 |
| Net Zero Pod® factory build | Off-site · zero site disruption | 0 |
| Pod cutover (crane lift + tie-in) | Full closure · pool + dryside | 7 |
| Pool pump VSDs | Bundled with pod cutover | 0 |
| Microfiltration | Pool only · learner pool open | 7 partial |
| Driver | Lost £ |
|---|---|
| Pod cutover · 7 full days | £18,200 |
| Microfiltration · 7 part-days @ 40% | £7,280 |
| Pod delivery day · car park closure | £1,400 |
| LED zone closure · gym 2 evenings | £620 |
| Total at risk | £27,500 |
| Mitigation: shoulder-season scheduling | −£10,400 |
| Mitigation: marketing campaign + comms | −£4,200 |
| Net residual | £12,900 |
| Temporary electric boiler hire | 7 d · £3,200 |
| Additional electricity (~6 MWh) | £1,180 |
| Temp heat carbon (operational) | 1.24 tCO₂ |
| Pool refill (5% top-up) | ~25 m³ · £55 |
| Chemical re-balance | £420 |
| Pod tie-in commissioning | £2,800 |
| Total cutover cost | £7,655 |