Floor
Temperature
Total Length of Outside Wall (m)
Area m
2
Options
1.5m
2m
3m
4m
5m
6m
7m
8m
9m
10m
11m
12m
13m
14m
15m
16m
17m
18m
19m
20m
Up to
Comfort
S/XS
S
S
M
M
M
3m
2
Background
S/XS
S/XS
S
S
S
M
Up to
Comfort
S
M
M
M
L
L
L
L
6m
2
Background
S
S
S
S
M
M
M
M
Up to
Comfort
S
M
M
L
L
L
L
MS
SM
2M
9m
2
Background
S
S
M
M
M
M
M
L
L
L
Up to
Comfort
M
M
L
L
L
MS
MS
MS
2M
2M
2M
LM
12m
2
Background
S
M
M
M
M
L
L
L
L
MS
MS
MS
Up to
Comfort
L
L
L
L
MS
MS
2M
2M
2M
LM
LM
2L
2L
15 m
2
Background
M
M
M
M
L
L
L
MS
MS
MS
2M
2M
LM
Up to
Comfort
L
L
L
MS
MS
2M
2M
2M
LM
LM
2L
2L
2L
3M
3M
18m
2
Background
M
M
M
L
L
L
MS
MS
MS
MS
2M
2M
2M
2M
LM
Up to
Comfort
L
L
MS
MS
2M
2M
2M
LM
LM
2L
2L
2L
3M
3M
3M
2L+S
21m
2
Background
M
M
L
L
L
MS
MS
MS
MS
2M
2M
2M
2M
LM
LM
LM
Up to
Comfort
L
MS
MS
2M
2M
2M
LM
LM
2L
2L
2L
3M
3M
3M
2L+S
2L+S
2L+S
24m
2
Background
M
L
L
L
MS
MS
MS
MS
2M
2M
2M
LM
LM
ML
2L
2L
2L
Up to
Comfort
MS
MS
2M
2M
2M
LM
LM
2L
2L
2L
2L
3M
3M
3M
2L+S
2L+S
2L+M 2L+M
27m
2
Background
L
L
L
MS
MS
MS
MS
2M
2M
2M
LM
LM
LM
2L
2L
2L
2L
2L
Up to
Comfort
2M
2M
2M
LM
LM
2L
2L
2L
2L
2L+S
2L+S
2L+S
2L+S
2L+M
2L+M
2L+M
2L+M
3L
3L
3L
30m
2
Background
L
L
MS
MS
MS
2M
2M
2M
2M
2M
LM
LM
2L
2L
2L
2L
2L
3M
3M
3M
Up to
Comfort
18
18
18
18
18
18
3m
2
Background
18
18
18
18
18
18
Up to
Comfort
18
18
18
18
24
24
24
24
6m
2
Background
18
18
18
18
18
18
18
18
Up to
Comfort
18
18
18
24
24
24
24
18+S
18+S
18+S
9m
2
Background
18
18
18
18
18
18
18
24
24
24
Up to
Comfort
18
18
24
24
24
18+S
18+S
18+S
18+M 18+M
18+M 18+M
12m
2
Background
18
18
18
18
18
24
24
24
24
18+S
18+S
18+S
Up to
Comfort
24
24
24
24
18+S
18+S
18+S
18+S
18+M 24+M
24+M 24+M
24+L
15m
2
Background
18
18
18
18
24
24
24
24
18+S
18+S
18+S
18+M
18+M
Up to
Comfort
24
24
24
18+S 18+S
18+S
18+M
18+M 24+M 24+M
24+L
24+L
24+L
24+L
24+L
18m
2
Background
18
18
18
24
24
24
24
18+S
18+S
18+S
18+M 18+M
18+M 18+M
24+M
Up to
Comfort
24
24
18+S
18+S 18+S
18+S
18+M
18+M 18+M 24+M
24+M
24+L
24+L
24+L
18+2M 18+2M
21m
2
Background
18
18
24
24
24
24
18+S
18+S
18+S
18+M
18+M 18+M
24+M 24+M
24+M
24+M
Up to
Comfort
24
24
18+S
18+S 18+S
18+M 18+M
24+M 24+M
24+L
24+L
24+L 18+2M 18+2M 24+2M 24+2M 24+2M
24m
2
Background
18
24
24
24
24
18+S
18+S
18+S
18+M 18+M
18+M 24+M
24+M 24+M
24+L
24+L
24+L
Up to
Comfort
18+S
18+S
18+S
18+M 18+M
18+M 24+M
24+M
24+L
24+L
24+L 18+2M 18+2M 18+2M 18+2M 24+2M 24+2M
27m
2
Background
24
24
24
24
18+S
18+S
18+S
18+M 18+M 18+M
24+M 24+M
24+M
24+L
24+L
24+L
24+L
24+L
Up to
Comfort
18+M 18+M
18+M
24+M 24+M
24+L
24+L
24+L
24+L 18+2M 18+2M 18+2M 18+2M 18+2M 24+2M 24+2M 24+2M 24+2L 24+2L 24+2L
30m
2
Background
24
24
24
18+S 18+S
18+M 18+M
18+M 18+M 18+M
24+M 24+M
24+L
24+L
24+L
24+L
24+L 18+2M 18+2M 18+2M
Up to
Comfort
600
600
1000
1000 1250
1250
3m
2
Background
600
600
600
1000 1000
1000
Up to
Comfort
600
1000
1000
1250 1250
1500
1500
2000
6m
2
Background
600
600
1000
1000 1000
1250
1250
1500
Up to
Comfort
1000
1000
1250
1250 1500
1500
2000
2000
2000
2250
9m
2
Background
1000
1000
1000
1250 1250
1250
1500
1500
2000
2000
Up to
Comfort
1250
1250
1250
1500 1500
2000
2000
2000
2250
2500
2500
2500
12m
2
Background
1000
1000
1250
1250 1250
1500
1500
1500
2000
2000
2000
2000
Up to
Comfort
1250
1250
1500
1500 2000
2000
2250
2250
2500
2500
2750
3000
3000
15m
2
Background
1000
1250
1250
1500 1500
1500
2000
2000
2000
2250
2500
2500
2500
Up to
Comfort
1500
1500
2000
2000 2000
2250
2500
2500
2500
2750
3000
3000
3250
3500
3500
18m
2
Background
1250
1250
1250
1500 1500
1500
2000
2000
2250
2250
2500
2500
2500
2500
2750
Up to
Comfort
1500
2000
2000
2000 2250
2250
2500
2500
2750
3000
3000
3250
3500
3500
4000
4000
21m
2
Background
1250
1500
1500
1500 2000
2000
2000
2000
2250
2250
2500
2500
2750
2750
3000
3000
Up to
Comfort
2000
2000
2000
2250 2500
2500
2750
2750
3000
3000
3250
3500
3500
4000
4000
4000
4000
24m
2
Background
1500
1500
2000
2000 2000
2000
2250
2250
2500
2500
2500
2750
2750
3000
3000
3250
3250
Up to
Comfort
2000
2000
2250
2500 2500
2750
3000
3000
3250
3500
3500
4000
4000
4000
4100
4400
4400
4750
27m
2
Background
1500
1500
2000
2000 2000
2000
2250
2500
2500
2500
2750
2750
3000
3000
3250
3250
3500
3500
Up to
Comfort
2250
2500
2500
2500 2750
3000
3000
3250
3250
3500
3500
4000
4000
4000
4100
4400
4400
4750
4750
5000
30m
2
Background
2000
2000
2000
2000 2000
2250
2500
2500
2500
2750
2750
3000
3000
3250
3250
3500
3500
4000
4000
4000
Extra Small (XS) = TSR6 = 0.9kW Small (S) = TSR12 = 1.7kW Medium (M) = TSR18 = 2.5kW Large (L) = TSR24 = 3.4kW
Sizing Guide
Storage and panel heaters
To use these tables, select the type of
heater and the appropriate sizing guide
table. Then read across from the nearest
floor area and appropriate external wall
length to where the columns intersect.
There are two temperature options given
in each table:
•
Comfort - approximately 21°C for living areas
•
Background - approximately 18°C, typically
required in bedrooms
Choose either comfort or background
heating for the suggested heater size.
These tables are based on conventionally
constructed single or two storey
dwellings within:
• Ceiling heights of 2.5m (8ft)
• Roof insulation of 25mm (1in) thick
• Brick cavity walls with no insulation
• An external temperature of -1°C
Tables for storage and storage fan heaters also assume
the use of 7 hour economy tariff electricity.
Please check your tariff and metering requirements
with either your electricity supplier or call the Creda
Technical Centre on 08709 000430.
Technical Specification
Product Selector
Panel heaters
Storage fan heaters
Storage heaters
44
+44 (0) 1733 456789 www.creda-heating.co.uk