| Feature |
Balanced
Flue (BF) |
Fan
Flue (FF) |
| Gas type |
Natural |
Natural |
| Min service
clearance above |
30mm |
120mm (Includes flue
elbow) |
| Min service
clearance sides |
5mm |
10mm |
| Min service
clearance below |
75mm |
50mm |
| Max DHW flow rate (Δ
T @ 30°C max) |
10.8 l/min |
11.7 l/min |
| Max DHW flow rate (Δ
T @ 35°C max) |
9.3 l/min |
10 l/min |
| Max DHW flow rate (Δ
T @ 50°C max) |
6.5 l/min |
7 l/min |
| Min operating DHW
pressure required |
0.2 bar |
0.3 bar |
| Max DHW system
pressure |
12 bar |
12 bar |
| Minimum flow rate
required |
2.5 l/min |
3 l/min |
| Heat input (net) |
25.5kW |
27kW |
| Heat output to water |
23kW |
23.8kW |
| Electrical
connection |
None |
230V fused UK plug |
| Gas connection pipe
size |
15mm |
15mm |
| Water connection
pipe size |
15mm |
15mm |
| Flue lengths |
Telescopic (100mm -
610mm) using 4 terminals |
Telescopic (to 680mm)
using 2 terminals. Extensions to 4m horizontal or vertical |
| Installer lift
weight |
20kg |
20kg |
| IP rating |
N/A |
IPX4D |