Colona 2-Column - Lacquered Bare Metal Products
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Frequently Asked Questions
What are the specific pipe center measurements and wall projection dimensions required to install the Colona 2-column vertical radiator onto existing pipework?
For the Colona 2-column range, the depth of the radiator itself is 98mm. When installing, the wall projection to the front face is typically 118mm, and the pipe centers from the wall are approximately 68mm. You must add the valve width to the radiator width (usually about 90mm total) to calculate the exact pipe center width for your plumbing setup.
Does the Reina Colona 2-column steel radiator range require specific Delta T50 calculations to ensure it meets the BTU heat output requirements of my room?
Yes, the heat output figures listed, such as 3410 BTUs for the 1800mm x 380mm model, are based on the Delta T50 standard (a 50
Can I install standard 15mm thermostatic radiator valves with the Colona 2-column lacquered bare metal radiator or are specific industrial valves required?
The Colona radiators feature standard 1/2 inch BSP bottom connections, making them fully compatible with standard 15mm thermostatic radiator valves. However, to maintain the industrial aesthetic of the lacquered bare metal finish, it is technically recommended to use matching brushed nickel or pewter finish valves rather than standard white plastic caps.
Why does the surface texture and colour tone vary between different sections of the Colona 2-column lacquered bare metal radiator and is this a defect?
This variation is a deliberate technical design feature of the lacquered bare metal finish. Because the clear lacquer is applied directly over raw steel, manufacturing artifacts such as laser weld lines, grinding marks, and natural steel discoloration remain visible. These are not defects but are intrinsic characteristics that ensure every radiator has a unique authentic industrial look.
How does the thermal conductivity and heat retention of the Colona mild steel construction compare to traditional cast iron column radiators?
Mild steel has higher thermal conductivity than cast iron, meaning the Colona 2-column radiator will heat up significantly faster when your central heating turns on. While cast iron retains heat longer after the system is off, the steel construction allows for more responsive temperature control, making it more energy efficient for modern programmed heating schedules.
Do the 1800mm vertical Colona 2-column radiators require the installation of top retaining wall stays due to their height and weight?
Yes, due to the height (1800mm) and the substantial weight of the water-filled steel columns (up to 27kg empty for larger models), installing top retaining wall stays is highly recommended technically. These stays anchor the top of the radiator to the wall to prevent forward tipping or movement, ensuring safety and reducing stress on the bottom bracket fixings.
What is the correct maintenance procedure for cleaning the clear lacquer coating to prevent peeling or damaging the corrosion resistance of the radiator?
To protect the clear lacquer seal, you should never use abrasive scouring pads or acidic chemical cleaners which can micro-scratch the surface and compromise the protective barrier. The correct technical maintenance involves using a soft microfibre cloth slightly dampened with warm soapy water to remove dust, ensuring the steel remains sealed against moisture ingress.
Is the Colona 2-column radiator range suitable for use on open vented hot water systems or is it restricted to sealed central heating systems only?
The Reina Colona range is manufactured from mild steel and is technically suitable for use on both open vented and sealed central heating systems. However, you must ensure your heating system contains the correct concentration of corrosion inhibitor fluid to protect the internal steel surface from rusting from the inside out.
How do the vertical columns of the Colona design improve heat convection efficiency compared to standard flat panel radiators?
The 2-column design significantly increases the surface area exposed to the air compared to a flat panel. This technical design promotes the chimney effect, where cool air is drawn up between the heated columns, warms rapidly, and circulates into the room via convection. This makes the Colona highly efficient at heating large volumes of air in spaces with high ceilings.