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
Technical Specification
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.
Storage heaters
Product Selector
Floor | Temperature |
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| Total Length of Outside Wall (m) |
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Area m2 | 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 |
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3m2 | Background | S/XS | S/XS | S | S | S | M |
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Up to | Comfort | S | M | M | M | L | L | L | L |
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6m2 | Background | S | S | S | S | M | M | M | M |
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Up to | Comfort | S | M | M | L | L | L | L | MS | SM | 2M |
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9m2 | Background | S | S | M | M | M | M | M | L | L | L |
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Up to | Comfort | M | M | L | L | L | MS | MS | MS | 2M | 2M | 2M | LM |
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12m2 | Background | S | M | M | M | M | L | L | L | L | MS | MS | MS |
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Up to | Comfort | L | L | L | L | MS | MS | 2M | 2M | 2M | LM | LM | 2L | 2L |
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15 m2 | Background | M | M | M | M | L | L | L | MS | MS | MS | 2M | 2M | LM |
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Up to | Comfort | L | L | L | MS | MS | 2M | 2M | 2M | LM | LM | 2L | 2L | 2L | 3M | 3M |
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18m2 | Background | M | M | M | L | L | L | MS | MS | MS | MS | 2M | 2M | 2M | 2M | LM |
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Up to | Comfort | L | L | MS | MS | 2M | 2M | 2M | LM | LM | 2L | 2L | 2L | 3M | 3M | 3M | 2L+S |
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21m2 | Background | M | M | L | L | L | MS | MS | MS | MS | 2M | 2M | 2M | 2M | LM | LM | LM |
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Up to | Comfort | L | MS | MS | 2M | 2M | 2M | LM | LM | 2L | 2L | 2L | 3M | 3M | 3M | 2L+S | 2L+S | 2L+S |
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24m2 | Background | M | L | L | L | MS | MS | MS | MS | 2M | 2M | 2M | LM | LM | ML | 2L | 2L | 2L |
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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 |
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27m2 | Background | L | L | L | MS | MS | MS | MS | 2M | 2M | 2M | LM | LM | LM | 2L | 2L | 2L | 2L | 2L |
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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 |
30m2 | Background | L | L | MS | MS | MS | 2M | 2M | 2M | 2M | 2M | LM | LM | 2L | 2L | 2L | 2L | 2L | 3M | 3M | 3M |
Storage fan heaters
Up to | Comfort | 18 | 18 | 18 | 18 | 18 | 18 |
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3m2 | Background | 18 | 18 | 18 | 18 | 18 | 18 |
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Up to | Comfort | 18 | 18 | 18 | 18 | 24 | 24 | 24 | 24 |
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6m2 | Background | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
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Up to | Comfort | 18 | 18 | 18 | 24 | 24 | 24 | 24 | 18+S | 18+S | 18+S |
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9m2 | Background | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 24 | 24 | 24 |
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Up to | Comfort | 18 | 18 | 24 | 24 | 24 | 18+S | 18+S | 18+S | 18+M | 18+M | 18+M | 18+M |
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12m2 | Background | 18 | 18 | 18 | 18 | 18 | 24 | 24 | 24 | 24 | 18+S | 18+S | 18+S |
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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 |
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15m2 | Background | 18 | 18 | 18 | 18 | 24 | 24 | 24 | 24 | 18+S | 18+S | 18+S | 18+M | 18+M |
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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 |
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18m2 | Background | 18 | 18 | 18 | 24 | 24 | 24 | 24 | 18+S | 18+S | 18+S | 18+M | 18+M | 18+M | 18+M | 24+M |
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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 |
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21m2 | 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 |
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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 |
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24m2 | 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 |
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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 |
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27m2 | 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 | |||||||||
30m2 | 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 | |
Panel heaters
Up to | Comfort | 600 | 600 | 1000 | 1000 | 1250 | 1250 |
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3m2 | Background | 600 | 600 | 600 | 1000 | 1000 | 1000 |
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Up to | Comfort | 600 | 1000 | 1000 | 1250 | 1250 | 1500 | 1500 | 2000 |
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6m2 | Background | 600 | 600 | 1000 | 1000 | 1000 | 1250 | 1250 | 1500 |
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Up to | Comfort | 1000 | 1000 | 1250 | 1250 | 1500 | 1500 | 2000 | 2000 | 2000 | 2250 |
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9m2 | Background | 1000 | 1000 | 1000 | 1250 | 1250 | 1250 | 1500 | 1500 | 2000 | 2000 |
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Up to | Comfort | 1250 | 1250 | 1250 | 1500 | 1500 | 2000 | 2000 | 2000 | 2250 | 2500 | 2500 | 2500 |
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12m2 | Background | 1000 | 1000 | 1250 | 1250 | 1250 | 1500 | 1500 | 1500 | 2000 | 2000 | 2000 | 2000 |
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Up to | Comfort | 1250 | 1250 | 1500 | 1500 | 2000 | 2000 | 2250 | 2250 | 2500 | 2500 | 2750 | 3000 | 3000 |
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15m2 | Background | 1000 | 1250 | 1250 | 1500 | 1500 | 1500 | 2000 | 2000 | 2000 | 2250 | 2500 | 2500 | 2500 |
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Up to | Comfort | 1500 | 1500 | 2000 | 2000 | 2000 | 2250 | 2500 | 2500 | 2500 | 2750 | 3000 | 3000 | 3250 | 3500 | 3500 |
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18m2 | Background | 1250 | 1250 | 1250 | 1500 | 1500 | 1500 | 2000 | 2000 | 2250 | 2250 | 2500 | 2500 | 2500 | 2500 | 2750 |
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Up to | Comfort | 1500 | 2000 | 2000 | 2000 | 2250 | 2250 | 2500 | 2500 | 2750 | 3000 | 3000 | 3250 | 3500 | 3500 | 4000 | 4000 |
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21m2 | Background | 1250 | 1500 | 1500 | 1500 | 2000 | 2000 | 2000 | 2000 | 2250 | 2250 | 2500 | 2500 | 2750 | 2750 | 3000 | 3000 |
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Up to | Comfort | 2000 | 2000 | 2000 | 2250 | 2500 | 2500 | 2750 | 2750 | 3000 | 3000 | 3250 | 3500 | 3500 | 4000 | 4000 | 4000 | 4000 |
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24m2 | Background | 1500 | 1500 | 2000 | 2000 | 2000 | 2000 | 2250 | 2250 | 2500 | 2500 | 2500 | 2750 | 2750 | 3000 | 3000 | 3250 | 3250 |
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Up to | Comfort | 2000 | 2000 | 2250 | 2500 | 2500 | 2750 | 3000 | 3000 | 3250 | 3500 | 3500 | 4000 | 4000 | 4000 | 4100 | 4400 | 4400 | 4750 |
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27m2 | Background | 1500 | 1500 | 2000 | 2000 | 2000 | 2000 | 2250 | 2500 | 2500 | 2500 | 2750 | 2750 | 3000 | 3000 | 3250 | 3250 | 3500 | 3500 |
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Up to | Comfort | 2250 | 2500 | 2500 | 2500 | 2750 | 3000 | 3000 | 3250 | 3250 | 3500 | 3500 | 4000 | 4000 | 4000 | 4100 | 4400 | 4400 | 4750 | 4750 | 5000 |
30m2 | 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 |
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44 | +44 (0) 1733 456789 |
