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A collection of tools to help with sizing of radiators and selection of parts. Includes guidance on nominal thread sizes, heat loss calculations and primers on common heating techniques.

Recommended Professionals

Professional tradespeople and designers that know our products inside out.


A suite of tools to help with sizing new radiators correctly. Includes basic and advanced heat loss calculators and panel output tool to compare existing…

Radiator Identifier

A Who's Who of cast iron radiators.

NPT Thread Size Guides

Use our tables and free downloads to ensure you're ordering the correct parts when replacing bushings and parts on old radiators.

Installation Guides

Installation instructions for many of our products. Includes radiator installation guides for both steam and hot water systems.

How it Works

A collection of primers on common heating techniques, components and principles.