Clarendon 440mm Products
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Frequently Asked Questions
How does the 440mm height of the Clarendon Cast Iron Radiator help solve installation problems in rooms with low window sills
The 440mm height is a specific technical dimension chosen to fit comfortably beneath the lower window sills often found in period Victorian and Edwardian properties. By sitting below the sill line, the radiator combats cold downdraughts from the glazing without obstructing the window view or interfering with full length curtains, making it the ideal problem solving solution for difficult architectural spaces.
What are the specific technical advantages of the Old School single column design regarding maintenance and heat distribution
The Clarendon features a classic Old School or School House design which is characterized by a thick single column with rounded shoulders and wide spacing between sections. This technical profile prevents dust from getting trapped in intricate crevices and allows for easy cleaning between the columns. Furthermore, the wide spacing promotes better air circulation, enhancing the convection current that distributes warm air throughout the room.
What is the heat output per section for the Clarendon 440mm model and how does this affect the sizing calculation for my room
Each individual section of the Clarendon 440mm radiator generates approximately 170 BTUs or 50 Watts at Delta T50. To solve the sizing requirement for your specific room, you must divide your total heat loss figure by 170. For example, a medium bedroom requiring 2500 BTUs would technically need a 15 section model. This modular sizing allows you to build the radiator to the exact width and output required.
Why is the floor load capacity a critical technical consideration when installing the Clarendon 440mm Cast Iron Radiator
The Clarendon 440mm is a high mass radiator. A typical 10 section assembly weighs approximately 42kg when empty and significantly more when filled with water. Technically, you must verify that your floor structure can support this concentrated static load. If installing on suspended timber floorboards, it is critical to position the integral feet directly over floor joists or install timber noggins underneath to prevent the floor from bowing or sagging over time.
Does the 150mm depth of the Clarendon radiator require specific planning for wall projection and walkway clearance
Yes, the Clarendon 440mm has a consistent section depth of 150mm. When planning your installation, you must technically account for the additional clearance required for the wall stay, which is typically 20mm to 30mm. This brings the total projection from the wall to approximately 180mm. In narrow hallways or corridors, you must measure the available width to ensure this deep profile does not create a trip hazard or obstruct door openings.
Why is the Clarendon 440mm radiator supplied in a primer finish and what are the technical painting requirements
The standard Black or White Primer is a temporary coating applied at the foundry to protect the cast iron from rust during transit and storage. It is not a sealed finish. Technically, the installer or decorator must apply a final topcoat using an oil based eggshell or specialist radiator paint to seal the metal against moisture and oxidation. Failure to apply this topcoat will eventually lead to surface rust, especially in damp environments.
What specific type of wall anchor or stay is required to ensure the stability of the floor standing Clarendon 440mm radiator
Although the Clarendon 440mm stands on its own integral cast iron feet, it is a heavy freestanding object. For safety and stability, a Luxury Wall Stay is technically mandatory. This brass or chrome arm clamps firmly between the radiator sections and anchors the top of the unit to the wall. It provides the necessary lateral strength to prevent the radiator from tipping forward if accidentally knocked, which is a critical safety requirement.
Are the standard connection ports on the Clarendon 440mm compatible with modern thermostatic radiator valves
The Clarendon 440mm is cast with standard 1/2 inch BSP female tappings at the bottom corners. This ensures full technical compatibility with all standard UK radiator valves, including modern Thermostatic Radiator Valves or TRVs. You do not need expensive adaptors. However, for aesthetic balance, it is recommended to use traditional style heavy pattern valves that match the chunky proportions of the Old School cast iron sections.
How does the high thermal mass of the Clarendon 440mm Cast Iron Radiator influence the heating efficiency and cool down times
Cast iron has a high density and specific heat capacity. The Clarendon 440mm takes longer to heat up than a steel radiator but retains heat for much longer. This technical characteristic is known as the flywheel effect. The radiator will continue to emit useful radiant heat for up to an hour after the boiler has switched off. This creates a very stable room temperature and prevents the rapid cooling often associated with modern low mass radiators.
What specific corrosion protection measures must be taken when installing the Clarendon 440mm on a mixed metal heating system
To protect the internal waterways of the cast iron sections, it is technically critical to maintain the correct water chemistry. You must use a high quality mixed metal corrosion inhibitor and maintain a neutral system pH between 7 and 8. If the system is too acidic or alkaline, it can corrode the cast iron or the copper pipework. Annual checks of the inhibitor concentration are required to prevent hydrogen gas build up and pinhole leaks, ensuring the 10 Year Guarantee remains valid.