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Freestanding Stove
technical specifications

Compare the table below with the diagram. Other technical specifications may also be found in the installation instructions.

18j 18f diagram

Model 18j 18q 18f 60f  
Primary Dimensions
A width 440 451 426 608 mm
B height 616 554 500 540 mm
C depth 404 360 355 355 mm
weight 75 105 55 75 Kg
Outputs (Wood)
Room size heated 100 100 100 150 m3
Total nominal heat output 4.9 4.9 4.9 6.9 kW
Net efficiency 84 85 84 83 %
Flue gas temperature 247 225 227 284 °C
mass flow 3 3.1 3.5 4.4 gs-1
mean CO2 12.44 12.44 11.65 12.39 %
mean CO @ 13% O2 0.33 0.35 0.30 0.29 %
Smokeless Zone Report
Defra-approved  
Flue dimensions
diameter 125 125 125 150 mm
area 123 123 123 177 cm2
D Top flue centre to rear 123 132 134** 134** mm
G Rear flue centre to rear 105 mm
F Top flue spigot height 55 45 45 mm
H Rear flue spigot depth 53 mm
Minimum flue draught 12 12 12 12 Pa
Minimum chimney height
Above Fire 4.5 4.5 4.5 4.5 m
Minimum air supply
Area 0* 0* 0* 14 cm2
Fueling
Max wood size length 325 300 300 450 mm
diameter 100 75 75 100 mm ø
Max refuel weight 1.4 1.28 1.28 2 kg
Minimum refuel interval 60 60 60 60 min
Wood & multi-fuel  
F model leg dimensions
E Short legs height 105 105 mm
Long legs height 155 155 mm
Traditional legs height 105 105 mm
Log store height 300 300 mm
Other dimensions
F unit with heat shield depth 380 380 mm
Direct air pipe depth 35 35 mm
diameter 63 63 mm ø
Imperial measurements 18j 18q 18f 60f  
Primary Dimensions
A width 17 ¼ 17 ¾ 16 ¾ 24 in
B height 24 ¼ 21 ⅞ 19 ⅝ 21 ¼ in
C depth 15 ⅞ 14 316 14 14 in
Flue dimensions
diameter 5 5 5 6 mm
area 20 20 20 28 in2
D Top flue centre to rear 4 ⅞ 5 316 5 ¼** 5 ¼** in
G Rear flue centre to top 4 ⅛ in
F Top flue spigot height 2 ⅛ 1 ¾ 1 ¾ in
H Rear flue spigot depth 2 ⅛ in
Minimum chimney height
Above Fire 15 15 15 15 ft
Minimum air supply
Area 0* 0* 0* 2.5 in2
F model leg dimensions
E Short legs height 4 ⅛ 4 ⅛ in
Long legs height 6 ⅛ 6 ⅛ in
Traditional legs height 4 ⅛ 4 ⅛ in
Log store height 12 12 in
Other dimensions
F unit with heat shield depth 15 15 in
Direct air supply depth 1 ⅜ 1 ⅜ in
diameter 2 ½ 2 ½ in ø

∆ Jetmaster estimated figures.
† 18q tested to EN13229: 2001, 18j, 18f & 60f tested to EN13240:2001.
◊ A multi-fuel basket grate is required for the 60f when burning multi-fuel.
* An air supply may be required in homes which have high levels of air-tightness.
** For F models, depth to flue is measured from the back of the heat shield.

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