Quick Start Manual

7.0 Site Requirements

7.10 Flue Options

1. The Baxi Combi Instant 80e and 105e can be fitted

with flue systems as illustrated.

2. The standard flue Kit No 247719 is suitable only for

horizontal applications.

3. Maximum permissible equivalent flue lengths are:-

Instant Instant

80e 105e

Concentric 5m 4m

Vertical 4m 4m

Vertical Two-Pipe 15m 12m

4. Any additional “in line” bends in the flue system must

be taken into consideration. Their equivalent lengths

are:-

Concentric Pipes:

45° bend 0.5 metres

90° bend 1.0 metres

Twin Flue Pipe

45° bend 0.25 metres

90° bend 0.50 metres

The elbow supplied with the standard horizontal flue is

not included in any equivalent length calculations

5. The illustrations opposite show examples of

maximum equivalent lengths.

6. Full details of part numbers and descriptions of all

optional flue components and kits can be found in the

Baxi Combination Boilers publication.

7. Instructions for guidance and fitting are included in

each kit where appropriate.

Horizontal

Flues

Vertical

Flues

Vertical

Flues

(Twin Pipe)

Maximum Length = 3m inc. 2 x 45° bends

Maximum Length = 11m

inc. 4 x 45° bends

Maximum Length = 2m

inc. 2 x 90° bends