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Choosing a Universal Convector Fire

As you review the table below, keep the following 4 things in mind…

1
Fireplace opening

Decide the largest fire that your fireplace opening (which may be enlargeable) and your chimney will allow.

2
Heat output

Decide the smallest fire capable of heating the room on its own, with your choice of fuel (see table below).

3
Aesthetics

Within this range, decide which size best compliments the aesthetic proportions of the room.

4
Overnight burn

If burning wood and particularly if you may want to burn wood overnight, we recommend a fire capable of burning sizeable logs.

FAQs
What size chimney do I need for my fire to burn properly?

Jetmasters are designed to ensure that smoke and flue gases are cleared properly and effectively. It is therefore vital that you choose the right size fire for your chimney. The specifications table shows the recommended and minimum flue sizes as well as the chimney height required.

If you have an existing chimney you need to measure:

  1. The internal size of the flue at its narrowest point - either the diameter if it circular or the length of its sides if it is square.
  2. The height from the top of the fire opening to the top of the flue.

If you are building a new chimney, ensure that it is designed to meet our recommended flue dimensions as well as current Building Regulations.

Do I need an air supply?

Current Building Regulations require that a room has an air supply. You may require additional permanent ventilation to comply with the building regulations and to help remove smoke and flue gas to make the fire burn more effectively.

A new source of air supply will be needed where a room has been double glazed or well sealed in some other way.




Technical Specifications

universal

Model Standard Low Universal Extra  
Size 16″ 18″ 500 600 700 500 600 700 700 850 1050 1200* 1500*  
Opening required  
Width 407 457 580 680 780 580 680 780 780 930 1130 1280 1580 mm
Height 559 559 535 535 535 635 635 635 685 735 785 1005 1005 mm
Depth 356 356 365 365 365 365 365 365 415 465 515 616 616 mm
Width 16 18 22 ⅞ 26 ¾ 30 ¾ 22 ⅞ 26 ¾ 30 ¾ 30 ¾ 36 ⅝ 44 ½ 50 ⅜ 62 ¼ ins
Height 22 22 21 21 21 25 25 25 27 29 31 39 ⅝ 39 ⅝ ins
Depth 14 14 14 ⅜ 14 ⅜ 14 ⅜ 14 ⅜ 14 ⅜ 14 ⅜ 16 ⅜ 18 ⅜ 20 ⅜ 24 ¼ 24 ¼ ins
Frame  
A Width 453 503 600 700 800 600 700 800 800 950 1150 1300 1625 mm
B Height 576 576 550 550 550 650 650 650 700 750 800 1020 1020 mm
A Width 17 ¾ 19 ¾ 23 ⅝ 27 ½ 31 ½ 23 ⅝ 27 ½ 31 ½ 31 ½ 37 ½ 45 ½ 51 ⅛ 64 ins
B Height 22 ⅝ 22 ⅝ 21 ⅝ 21 ⅝ 21 ⅝ 25 ⅝ 25 ⅝ 25 ⅝ 27 ½ 29 ½ 31 ½ 40 ⅛ 40 ⅛ ins
Firebox  
C Width^ 398 448 550 650 750 550 650 750 750 900 1100 1250 1500 mm
D Height 549 549 530 530 530 630 630 630 680 730 780 1000 1000 mm
E Depth 350 350 355 355 355 355 355 355 405 455 505 606 606 mm
C Width^ 17 ¾ 19 ¾ 23 ⅝ 27 ½ 31 ½ 23 ⅝ 27 ½ 31 ½ 31 ½ 37 ½ 45 ½ 51 ⅛ 64 ins
D Height 21 ⅝ 21 ⅝ 20 ⅞ 20 ⅞ 20 ⅞ 24 ¾ 24 ¾ 24 ¾ 26 ¾ 28 ¾ 30 ¾ 39 ⅜ 39 ⅜ ins
E Depth 13 ¾ 13 ¾ 14 14 14 14 14 14 16 18 20 23 ⅞ 23 ⅞ ins
Weight 37.0 45.0 - - - 52.4 58.6 68.3 75.7 98.6 132.3 215 260 kg
Average outputs to room  
Room size heated 57 70 70 130 150 130 150 170 175 200 250 - - M3
Wood† 2.9 3.6 5.0 6.5 7.5 6.5 7.5 8.5 9.5 14.9 17 - - kW
Coal 3.8 4.1 5.3 6.7 7.6 6.7 7.6 8.6 8.7 13.1 15 - - kW
Smokeless Fuel 2.9 3.2 4.0 5.1 5.8 5.1 5.8 6.6 6.7 10.1 12 - - kW
Recommended Flue  
Square 185 185 185 185 185 185 185 200 200 250 300 350 350 mm
Square 7 ¼ 7 ¼ 7 ¼ 7 ¼ 7 ¼ 7 ¼ 7 ¼ 8 8 10 12 14×20 14×20 ins
Round 180 200 200 200 200 200 200 200 225 250 300 450 450 mm
Round 7 8 8 8 8 8 8 8 9 10 12 18 18 ins
Minimum flue  
Round 155 180 180 185 190 180 190 200 225 250 300 - - mm
Round 6 7 7 7 ¼ 7 ½ 7 7 ½ 8 9 10 12 - - ins
Area 190 250 250 267 285 250 285 315 366 507 730 450 450 cm2
Area 30 38 38 42 44 38 44 50 57 79 113 - - in2
Draught 10 10 10 10 - 10 10 - - - - - - PA
Chimney Height  
Above fire 4.6 4.6 5.5 5.5 5.5 5.5 5.5 5.5 5.5 6 7.2 7.2 7.2 m
Above fire 15 15 18 18 18 18 18 18 18 20 24 24 24 ft
Air supply  
Area 170 170 230 230 230 230 230 230 230 350 500 1000 1000 cm2
Area 26 26 36 36 36 36 36 36 36 55 78 156 156 in2

∆ Jetmaster estimated figures
† Tested to BS3250
* The dimensions and outputs for the 1200 and 1500 are estimated
^ Damper and friction bar bolt heads extend beyond this dimension

Gathers and adapters

Standard Gather

Standard Gather

Model Low & Universal Extra  
Size 500 600 700 700 850 1050  
F 215 215 215 215 265 315 mm
G 250 275 325 325 380 455 mm
H 140 140 140 178 219 259 mm
J 144 144 144 156 165 175 mm
K 0 0 0 34 25 15 mm
L 251.5 251.5 251.5 263.5 297.5 332.5 mm

Staggered Gather

Staggered Gather

Model Low & Universal Extra  
Size 500 600 700 700 850 1050  
F 215 215 215 215 265 315 mm
G 250 275 325 325 380 455 mm
H 140 140 140 178 219 259 mm
J 284 284 284 296 305 315 mm
K 144 144 144 106 115 125 mm
L 391.5 391.5 391.5 403.5 437.5 472.5 mm

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