S & P Coil Products - Air Curtains / Radiant Conditioning Sails Design Criteria

Warm Air Curtains - Radiant Conditioning - Sails Design Criteria and Principles

MINIB Trench Heating

What should you look for during the selection of Trench Heating?

The convector has an optimal output at a mean water temperature of 70ºC (75/65ºC).

At lower temperature it is necessary to calculate requirements against a lower output and to use suitable sized units or one that is fan assisted.

What is it necessary to know before selecting the convector?

• The floor structure (the floor structure determines the depth of the convector)
• Heat losses of the room (heat losses of the room determine the selection of the convector type)
• Position of the thermostat & transformer that are parts of the electronic control of fan assisted convectors
• Type of final floor covering & its colour (determines selection of the grille & decorative frame)

Designer Warm Air Curtains

Created for stylish interiors where the smallest details are important, the Airdor designer collection of air curtains are an immaculate combination of form and function. With sleek profiles and low noise, the neatly proportioned and unobtrusive units are available in finishes to suit all installations. High performance, a choice of heating media and a wide selection of control options ensure economic operation and optimum comfort.

Air Curtains

Proper attention to the size, type and positioning of the air curtain will maximise the energy savings that can be realised in your application. In order to properly specify air curtains the following should be considered.

Vertical or Horizontal

Preference is to mount air curtains horizontally above the door that they are protecting. If insufficient bulkhead exists then air curtains can be mounted vertically so as to blow across the doorway.

Mounting Height

The air curtain should be mounted as close to the top of the door it is protecting as possible. Each size of air curtain has a maximum recommended mounting height beyond which its effectiveness is limited.

Door Width

In order to adequately protect the doorway the air curtain width should be selected to be at least equal to the width of the doorway; this prevents air ingress through bypass around the curtain.

For vertical air curtains each size of unit will have a maximum door width which it can protect by blowing a jet across the opening; for wide doors vertical units can be positioned on either side of the door.

Revolving doors are best protected by vertical air curtains next to the inner exit.

Type of Heating

Ambient air curtain blow a jet of untreated air across the opening; these units are ideal for warm climates or industrial applications. Comfort applications in cool climates require the jet of air to be heated before discharge.

If a supply of hot water is available then this is the most efficient means of heating the air using a coil heat exchanger in the air curtain, otherwise air curtains can be supplied with electric heating elements.

Controls

What level of comfort is required in the space? The simplest form of control involves switching the air curtains on and off and changing their speed; for doors which are open for long periods of time this may be the best option.

For areas subject to fluctuations in both traffic, occupancy and temperature more sophisticated controls can be used. These vary the heat and velocity outputs of the curtain in response to signals from thermostats, door contractors, BMS, etc and will help to optimise the energy efficiency of the air curtain and the building.

THERMASAIL Radiant Conditioning Sails

At the heart of the SPC’s THERMASAIL system is a unique, patented composite aluminium sheet panel.

Structurally rigid, the panel is used elsewhere in the automotive and marine construction industries, because of its high strength and low weight characteristics. It is a building material in its own right.

The good thermal conductivity of the aluminium panel ensures high efficiency for SPC radiant heating and cooling products.

Basic Operation

Chilled or hot water is introduced into the panel via copper pipes which are mechanically fixed into aluminium extrusions. The extrusions are then bonded and riveted to the upper surface of the panel ensuring excellent and reliable heat transfer.

Cooling

When chilled water is passed through the coil, the large chilled lower surface cools the air against it. It also absorbs radiant gains from the room.

The air above the panel is also cooled, and this cooled air convects around the edges of the sail. The unique strength of the panel eliminates the need for any structural sidewall allowing unrestricted cooled air movement and high cooling performance.

Heating

When warm water is passed through the coil, the lower surface of the sail operates as an efficient radiant heater. The air above the panel is also warmed, and convects into the room space.

With a large heated area, low water temperatures can be used which maximises boiler efficiency. The system has a low inertia, reacting very rapidly to heating and cooling demands, ensuring minimum energy consumption.

For further information on any of SPC's products, or to arrange a no obligation visit to discuss the possibilities of using these products, please contact our sales team who will be pleased to assist.