Posted 20 hours ago

MAP Vents 956-27 Metal Louvre Vents, Brass, 9" x 6"

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Our Fire Door Grille range is designed with the perfect blend of aesthetics and function. From the classic styling to the robust components and unique features, these grilles are perfectly suited for both modern and traditional buildings alike. Zinc is a soft metal and as such is not used structurally, It is used in large flat panels as a waterproof membrane on roofs but it's most common use is as a coating to other less weather resistant materials. This process is called galvanising and is most commonly used to cover carbon steel which would otherwise rust without the aid of a zinc coating. Copper is a popular decorative material for external use, being used for ventilation grilles both for its practical benefits and also because of the interesting way in which it tarnishes. When it is new it is a bright shiny orange/pink colour, as it ages it slowly darkens to a flat brown and if left for longer will adopt a patina called verdigris, which is bright turquoise in colour. This effect is often employed for decorative roofing purposes. The turquoise colour is a result of the slow reaction between the copper and the air resulting in copper carbonate. This was used by the ancient Greeks as a pigment in their artworks. Decorative screens and panels can be woven from copper and if used outside will become more striking as they age. Copper ventilation grilles are sometimes seen on historic buildings where they are set into stonework. Internally a wider variety of metals and finishes are suitable for making. Brass grilles can be polished, lacquered, patinated or plated, as can bronze, aluminium, steel and stainless steel. These metals can also be made to look similar to each other through these processes. For indoor purposes ventilation grilles can be placed on almost any interior surface provided there is some opportunity behind it to attach the duct that will enable the transfer of air. Ventilation grilles can be placed in walls, floors, ceilings, staircases, skirting boards, cornices, plinths, fireplaces, bay windows, in-built in furniture and many other places within the home. In some places the vent grilles may be used for a slightly different purpose such as in fireplaces where they would be used to allow a greater flow of air directly and specifically to the hearth itself. Vent grilles are also used to transfer air between rooms. Where vent grilles are used in air conditioning they are often referred to as supply and return grilles referring to whether they are covering the section of ducting where air is either drawn in or expelled. James Gilberts grilles are made for all these purposes and indeed most of our grilles are interchangeable to suit a wide variety of situations.

The metals that are most suited to use in the manufacture of outdoor vent grilles are stainless steel, zinc, copper and aluminium. Due to their weather resistant nature all of these metals can be found in roofing materials. Higher grades of stainless steel will remain highly resistant to tarnishing for long periods of time, which is why they are used in marine applications. Once polished it will require very little maintenance to keep it that way. It is also extremely hard and can be used structurally. Zinc will start off bright silver and then darken to a dull grey over time. Woven grilles are made by weaving wires together, alternately overlapping each one over and under the perpendicular wires to create a lattice. Regency Radiator Grilles Solid brass ventilation plate/grille with open close feature. Supplied with fixings. Available in 165mm x 242mm. Square hole vents offer an attractive solution to ventilation requirements. Often used in domestic flooring where ventilation is required for gas fires. Metal grilles can be used both internally and externally and depending on where they are to be used certain metals are more appropriate. This is the case with most metal products. External ventilation grilles are most commonly used to allow the free flow of air between the inside and the outside of a building. Whilst it is actually the duct that runs between the two environments through which the air spends most of its time travelling, it is the vent grille at either end which effectively provides a type of filter allowing only the air to pass through freely whilst acting as a hindrance to all but the smallest of visible particles and beasties. At the external face of the building a vent grille will be placed over the end of the duct to stop creatures such as birds and mice from gaining ingress. Usually this type of vent grille is plain in design and often of a similar colour to its surroundings so as to render it as invisible or at least unobtrusive as possible. The most appropriate metals for this purpose are stable ones, which are the least affected by the elements. Brass grilles are not often used outside.Recessed grilles are used to provide ventilation and free air flow to floors, walls and work surfaces. They can also be used on kitchen worktops and floor plinths to provide ventilation for electrical appliances. Typically recessed grilles are designed for adhesive fixing allowing for a clean, fixing free appearance, which also makes installation easy. Solid brass ventilation plate with grille cowl feature. Supplied with fixings. Available in 242mm x 89mm sizes. Solid brass ventilation plate/grille with open close feature. Supplied with fixings. Available 165mm x 89mm & 242mm x 89mm sizes. Unless otherwise specified, it is assumed that all grilles are to be viewed from the front only and will not, therefore, receive the same standard of finishing on their reverse faces. If your grille will be regularly viewed from the rear as well and you would like us to finish it to a similar standard as the front, please specify this in the notes. Additional charges will apply. This is especially important with antique and bronzed finishes. Solid brass ventilation plate with grille cowl feature. Supplied with fixings. Available in 165mm x 242mm and 242mm x 242mm sizes.

The term hit and miss refers to the open/closed design. Hit and miss vents can be closed to restrict the air flow and should not be used when venting a gas appliance. Air vents are available in various designs and styles, including plain slotted hole vents, louvres, hit and miss, circular and square mesh patterns. Linear grilles are commonly used with under floor air conditioning systems. The spacing of the blades is set to prevent stiletto heels from passing through. Linear grilles can be supplied with a frame or just the core which set rebated into the floor covering. Linear grilles are also used in fine joinery and often let into the top surface of a radiator cover. The grilles are made to specification and can be adapted to suit the clients design. Manufactured in brass and available in a range of finishes. Aluminium is very light, is used to make aeroplanes and is best if painted or anodised to prevent tarnishing.

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