Grandee Combi Model:

SFS 15/20

SFS 15/20

SFS 20/25

SFS 20/25

SFS 5/29

SFS 25/29

Nominal kweat Output Btu / h

14.6
50,000

17.6
60,000

20.5
0,000

23
80,000

26.4
90,000

29.3
100,000

Nominal Btu / h
Heat Input kW

55,550
16.3

66,660
19.5

77,770
22.8

88,880
26

99,990
29.3

111,110
32.5

Burner

Ecofiam Super spec or EOGB Sterling H.W.

Weight Empty kg
ibs

128
281

128
281

128
281

128
281

131
289

131
289

Weight Full kg
lbs

187
411

187
411

187
411

187
411

175
385

175
385

Water Litres
Content Gallons

60
13

60
13

60
13

60
13

45
10

45
10

Fuel

Kerosene Class C2

Fuel Type

Balanced or Conventional

Flue Size C.F.

4"

4"

5"

5"

5"

5"

Appliance Full Load
Efficiency %

92

93

93

92

93

92

Exit Flue Con. mm
Diameter ins

63
2.5"

CF 4"

CF 5"

CF 5"

CF 5"

CF 5"

Exit Flue Gas C
Temp at Rated Output

210 C+
Ambient

215 C+
Ambient

220 C+
Ambient

225C+
Ambient

220C+
Ambient

215C+
Ambient

Exit Flue Gas C
Mass Flow sec

.0151 kg/sec

0096kg / sec

.0011 kg / sec

.00128 kg / sec

.0131kg / sec

.014555kg / sec

Fuel Burning kg/
Rate sec

0.795

0.482

0.565

0.646

0.72

0.786

Control Thermostat

Adjustable between 50 C - 80 C

High Limit Thermostat

Factory et 95 C

Waterside Resistance m/bar

5.8 at 20 C Diff 23 at 10 C Diff

Flow & Return
Socket ins

1 x 3/4" BSP
1 x 22mm

1 x 3/4" BSP
1 x 22mm

1 x 3/4" BSP
1 x 22mm

1 x 3/4" BSP
1 x 22mm

1 x 3/4" BSP
1 x 22mm

1 x 3/4" BSP
1 x 22mm

System Types

Sealed

Indicator Lights

Mains - Amber High Limit Stat-Red

Max Hearth Temp C

Below 85 C

Below 85 C

Below 85 C

Below 85 C

Below 85 C

Below 85 C

Max Side Panel Temp C

Below 35 C plus Ambient

Max Temp adjusting

Control Safety

devices C

30 C

30 C

30 C

30 C

30 C

30 C

Max Emission Limits

or Class

Class 1

Class 1

Class 1

Class 1

Class 1

Class 1

Max Operating Pressure

45p.s.i. (3 Bar)

45p.s.i. (3 Bar)

45p.s.i. (3 Bar)

45p.s.i. (3 Bar)

45p.s.i. (3 Bar)

45p.s.i. (3 Bar)

Test Pressure

65p.s.i. (4.5 Bar)

65p.s.i. (4.5 Bar)

65p.s.i. (4.5 Bar)

65p.s.i. (4.5 Bar)

65p.s.i. (4.5 Bar)

65p.s.i. (4.5 Bar)

Electricity Supply

220/240V

Phase 1

50Hz

5 amp fuse

Acoustic Insulation

Specialised Foam Material