Louis 760mm Products
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Frequently Asked Questions
How does the 760mm height of this Louis model affect the convection efficiency compared to the shorter 560mm version?
The 760mm height creates a stronger "chimney effect" (natural draft) than the shorter model. As air enters the bottom and is heated by the 760mm tall columns, it gains more velocity before exiting the top. This means the Louis 760mm is technically more efficient at circulating warm air into the center of a room with high ceilings, whereas the 560mm version relies more on localized radiant heat at knee level.
My window sill is exactly 800mm from the floor; is the Louis 760mm radiator suitable for this space?
Installing a 760mm radiator under an 800mm sill leaves only a 40mm air gap. Technically, we recommend a minimum clearance of 50mm (ideally 100mm) above the radiator to prevent heat entrapment. If you install the Louis 760mm here, you may trap a cushion of hot air under the sill, which reduces the radiator's efficiency and can cause the wooden sill to warp. In this specific scenario, the 560mm model would be the superior engineering choice.
Does the 293 BTU output per section of the Louis 760mm mean I can use fewer sections than the 560mm model to heat the same room?
Yes. Since the Louis 760mm produces higher output per section (293 BTU vs ~276 BTU for the 560mm), you can achieve the same total heat load with a narrower radiator. For example, to get 3000 BTUs, you would need roughly 11 sections of the 560mm model (Width ~830mm) but only 10 sections of the 760mm model (Width ~760mm). This makes the 760mm version a better problem-solver for narrow wall spaces.
Given the higher center of gravity of the 760mm Louis radiator, is a standard
No. The Louis 760mm is tall and slim (135mm depth). A standard L-bracket offers minimal leverage against tipping. For the 760mm height, you must use a Luxury Front-Mounted Wall Stay or a clamp-style stay that grips the column near the top (approx. 650mm up). This provides the necessary mechanical advantage to anchor the 80kg+ unit firmly to the wall, preventing it from toppling if knocked.
How does the water content of the 760mm Louis radiator affect the sizing of my expansion vessel?
The 760mm Louis holds approximately 20-25% more water per section than the 560mm model. If you are retrofitting a house with these larger radiators, the total system volume will increase significantly. You must check that your boiler's internal expansion vessel (often 8-10 litres) is sufficient. For a system with multiple Louis 760mm radiators, you will almost certainly need to install an additional external expansion vessel (e.g., 18L or 25L) to handle the thermal expansion safely.
If I replace a standard steel panel radiator with a Louis 760mm, do I need to upgrade the piping from 10mm microbore?
Cast iron radiators like the Louis 760mm function best with high flow rates due to their large water volume. 10mm microbore piping restricts flow and can lead to the radiator heating up very slowly or the "distal" end (furthest from the valve) remaining cold. We strongly recommend upgrading to 15mm copper pipework for the Louis 760mm range to ensure the full 293 BTU output is realized across the entire length of the radiator.
Does the 10 Year Guarantee cover the paint finish if I install the Louis 760mm radiator near a shower or bath?
The standard guarantee covers the watertight integrity of the iron. It does not typically cover cosmetic corrosion of the paint finish in high-humidity zones unless a specific "Bathroom Specification" paint (e.g., epoxy or heavy lacquer) was ordered. Standard primer or porous paints will absorb moisture in a bathroom, leading to rust spots on the ornate 760mm surface within months. You must specify a moisture-resistant topcoat for validity in damp rooms.