Radiator Stelrad Compact C21 600x900 mm – output 974 W, model C21/60/090

The Stelrad Compact C21 radiator, model C21/60/090, measures 600×900 mm and delivers a rated heat output of 974 W. This panel convector radiator is designed for central heating systems and provides steady, efficient heat transfer for residential and commercial interiors. With a compact profile and standard mounting options, the radiator fits wall installations and connects to conventional water-based heating circuits.

Advantages

The Compact C21 features a durable steel panel construction and an internal convector to increase surface area and improve thermal efficiency. Its compact dimensions make it suitable for rooms where space is limited while maintaining a high output relative to its size. The radiator is compatible with typical wall brackets and pipe connections, allowing straightforward replacement or upgrade of existing heating units.

Suitable for

• Living rooms and bedrooms in private homes
• Offices and small commercial spaces
• Hallways and corridors
• Replacement of old panel radiators

Key specifications

• Type: panel convector radiator with integrated convector fins
• Dimensions: 600 mm width × 900 mm height
• Nominal heat output: 974 W (rated output under standard test conditions)
• Material: pressed steel panels with internal convector elements
• Mounting: wall-mounted configuration with standard bracket interfaces
• Connection: compatible with water-based central heating systems
• Finish: factory-applied protective coating for indoor use

How to use

Install the radiator on a suitable load-bearing wall using the manufacturer-recommended wall brackets and fixings. Connect the inlet and outlet to the building's hot water heating circuit following standard plumbing practice, ensuring correct valve orientation and leak-free joints. Bleed trapped air from the radiator after filling the system and check that the boiler and controls deliver the expected flow and return temperatures to achieve the rated output.

Usage recommendations

For optimal performance, fit thermostatic radiator valves and balance the heating system to ensure even heat distribution. Regularly inspect wall fixings and pipe connections for signs of corrosion or leaks, and purge air from the system seasonally or after maintenance. When replacing an existing radiator, compare dimensions and pipe locations to minimise additional pipework.

brand: Stelrad