Witton Type 22 Products
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Frequently Asked Questions
What does the Type 22 classification mean for the Witton radiator range?
The Type 22 classification, often abbreviated as K2, indicates the internal construction of the radiator designed for high performance. It consists of two flat panels (front and back) with two rows of internal convector fins welded between them. This "Double Panel, Double Convector" design creates a massive surface area for heat exchange, allowing the radiator to generate significantly more warmth than Type 11 (single convector) or Type 21 (single convector between panels) models of the same dimensions.
What are the exact depth and wall projection dimensions I need to plan for?
The Witton Type 22 has a product depth of 102mm due to its dual panel and dual convector structure. When installing, you must calculate the total projection by adding the depth of the wall brackets to this figure. This typically results in a projection of approximately 135mm to 150mm from the wall. You must measure your available floor space carefully to ensure this deep profile does not obstruct doors, walkways, or furniture placement.
How does the heat output of the Witton Type 22 compare to standard single panel radiators?
Due to its double panel and double convector design, the Witton Type 22 delivers roughly 70-80% more heat than a standard Type 11 radiator of the same size. For example, a 600mm x 2000mm Witton Type 22 produces approximately 11,130 BTUs. This high output makes it the technically superior choice for large rooms, open-plan living areas, or older properties with poor insulation where maximizing heat from a limited wall space is critical.
Are the Witton Type 22 radiators compatible with standard UK central heating systems?
Yes, the Witton Type 22 range is designed for full compatibility with all standard UK central heating systems, including modern high-pressure combi boilers and traditional open-vented tank systems. They are manufactured from high-quality steel and operate efficiently at standard pressures. The radiators feature standard 1/2 inch BSP connections, allowing for easy integration into existing pipework without the need for specialist adapters.
What connection options are available on the Witton Type 22 radiator?
The Witton Type 22 typically features four tapping points (connections) located at each corner. This configuration offers installation flexibility, allowing you to connect valves to the bottom sides (BOE - Bottom Opposite End) which is the most common UK setup. Alternatively, top and bottom connections on the same side (TBSE) can be used for specific flow requirements, provided the correct baffles are used. Standard 1/2 inch BSP valves fit these connections perfectly.
Why is the Witton Type 22 recommended for use with heat pumps?
Modern heat pumps operate at lower water temperatures (e.g., Delta T30) compared to gas boilers (Delta T50). To maintain a comfortable room temperature with cooler water, you need a radiator with a very large surface area. The Witton Type 22's double panel, double convector construction provides this necessary surface area, enabling effective heat emission even at lower system temperatures, making it a "future-proof" choice for energy-efficient homes.
Can I install the Witton Type 22 on a stud partition wall?
The Witton Type 22 is a heavy-duty radiator; a large model like the 600mm x 1400mm holds a significant volume of water and has a high steel weight. Installing this on a plasterboard stud wall using standard fixings is risky. You must anchor the heavy-duty wall brackets directly into the solid timber studs or use a specialized radiator mounting system that distributes the weight across the wall. Reinforcing the wall with timber noggins prior to plastering is the safest technical solution.
Does the 10 Year Guarantee cover the internal convector fins?
Yes, the 10 Year Guarantee provided with the Witton Type 22 range covers the complete structural integrity of the unit, including the welding of the internal convector fins to the panels. This warranty protects against leaks, weld failures, and material corrosion under normal operating conditions. To ensure the guarantee remains valid, the central heating system should be flushed and treated with a chemical inhibitor to prevent internal sludge and corrosion.
What finish is the Witton Type 22 supplied in and can it be painted?
The radiator is supplied in a high-quality, durable White RAL 9016 powder-coated finish as standard. This finish is heat resistant and easy to clean. While it is possible to paint over powder coating using specialist radiator paint, doing so is not generally recommended as it may affect the heat emission slightly and could potentially invalidate the manufacturer's warranty regarding the finish quality.
How do I choose the right size Witton Type 22 for my room?
To select the correct size, you must first calculate the heat loss of your room using a BTU calculator, considering room dimensions and window types. Once you have a target BTU figure, browse the Witton Type 22 size table. Choose a model that meets or slightly exceeds your requirement. For example, if you need 5000 BTUs, the 600mm x 900mm model (5009 BTUs) is the correct technical match. Avoid undersizing, as the radiator will struggle to heat the space efficiently.