Mini natural ventilation brochure 2013

natural ventilation technical submission

NaturalVentilationSolutions

0844 809 2509 | airtherm.co.uk | [email protected]


Introduction to Airtherm Airtherm Engineering Limited supply a wide range of natural ventilation and lighting systems that can be designed and installed to suit virtually any application. We provide for the commercial, educational, industrial and

private sectors and our products are increasingly popular in

schools, hospitals, offices and industrial buildings.

Natural Ventilation and Lighting systems make use of nature's

own power source to provide interior spaces with a fresh air

supply or natural daylight illumination or both.

Buildings utilising natural ventilation or lighting systems, by

their very nature, experience a significant reduction in traditional

energy running costs.

The Airtherm ‘Wind-iVent’ is a natural ventilation system

operating on established aerodynamic principles. As air flows

around the terminal itself, positive and negative pressure areas

are generated. On the positive side air enters the louvres of the

terminal and is directed down through the internal vanes into the

room below. The negative pressure on the leeward side of the

terminal, induces air to leave the louvres, and stale air from the

room below rises and is expelled from the terminal. This process

is aided by stack effect, i.e. as cool air enters the windward side of

the unit it descends into the room below, and the warm stale air

rises in the ducts facing the leeward side providing a naturally

fresh environment.

Natural Ventilation| Introduction


Our Natural Product Range

Energy Efficient Heating, Cooling, Ventilation & Renewables from Airtherm Engineering Ltd »

Airtherm Engineering Ltd only use products of the highest quality and experienced engineers

with excellence in their field. We aim to provide specifiers and contractors with complete

confidence in our service by managing projects closely, adhering to strict safety guidelines,

demanding the highest quality workmanship and will continue to strengthen our business by

listening to customer feedback.

Health Benefits

By its very nature, the Wind-iVent (natural ventilator), Solar-iVent, (solar-ventilator) Passive-

iVent (passive ventilator) Lite-iVent (combined wind & light ventilator) and our X-iVent (cross

wall ventilation) systems all offer a natural solution to health problems commonly associated

with mechanical air conditioning units. Rather than re-circulating stale air (and possibly

germs), the natural ventilation system is continually removing stale air and replacing it with a

fresh supply. The system takes air from the roof level eliminating a proportion of pollution,

including hazardous carbon monoxide from roadside traffic that is a common issue with low

level ventilation methods.

Suitable Applications

Our natural ventilation products are suitable for many applications including schools, offices

and hospitals. They are also used in private, local authority and commercial premises

including gymnasiums, colleges, universities, reception areas, store rooms, changing rooms,

libraries, meeting halls and are also suitable for specialist applications. They provide an ideal

solution for delivering a 'fresh' air supply to areas where conventional room ventilation is

difficult due to critical noise issues.

The Ideal Solution

Our natural ventilation systems offer architects and consulting engineers not only a natural

and environmentally-friendly solution but an acoustically efficient, economical and aesthetic

answer to ventilation needs.

Natural Ventilation| Product Range


Industrial Our flue and chimney exhaust systems are the obvious products utilised

by the industrial sector, however our line of natural ventilation and

lighting systems are proving increasingly popular solutions in industrial

buildings and factories throughout the UK.

Our kitchen canopy system sizes are suited to industrial applications as

well.

Leisure

Our natural ventilation and light systems are ideally suited to the leisure

sector where a fresh air supply is essential or bright illumination of large

spaces is required.

Our flue and chimney systems are also ideal to handle any exhaust

requirements demanded by the large boilers often used in leisure centres.

Popular applications include gymnasiums, sports halls and health clubs.

Healthcare

Natural ventilation and lighting is a very popular solution in the health

care sector in hospitals, nursing homes and other institutions. Providing

fresh, breathable air and natural light for patients and health care

workers has numerous benefits to health, recovery and staff

productivity.

Similarly, our kitchen canopies offer a safe, hygienic working

environment where food can be prepared quickly and efficiently without

the worry of external contamination.

Our Sectors

Natural Ventilation| Our Sectors


Commercial

Our complete product range is ideally suited to applications

throughout the commercial sector. Increasingly, office buildings are

benefitting from new, greener, more efficient technologies such as

natural ventilation, natural lighting, heat pumps, solar pv and our

energy-saving air conditioning units.

Our range of exhaust products, from flues and chimneys to kitchen

extract canopies, are also suitable for commercial installation.

Educational

Our product range is perfect for the educational sector. We have found

schools and colleges are often keen to utilise the latest green and eco

technology, not just to lower costs but to act as a living experiment for

pupils and parents to experience.

Our natural ventilation systems are a great solution for classrooms

and the daylight supply from our natural lighting products are ideally

suited for the daily periods of occupation.

The growing use of heat pumps and solar pv technology to generate

hot water and electricity while reducing a buildings carbon footprint

are also widely employed as part of a whole building strategy.

Our flue and chimney exhaust systems are also suited to the

buildings heating demands and kitchen canopies can be installed

where on-site cooking or food preparation facilities are used.

Retail

Our efficient, high performance kitchen canopies are ideal for

restaurants and food based retail outlets where food must be

prepared quickly, hygienically and safely. They are used throughout

the industry by outlets ranging from the small to large.

Our air conditioning units are, traditionally, widely used throughout

the retail sector. Our growing range of greener, more efficient and A-

rated energy products are a stylish complement to any shop or as a

replacement for older, less efficient models.

Our Sectors

Natural Ventilation| Our Sectors


Wind-iVent - Natural Ventilation Systems

Our natural ventilation solutions consist of two synchronizing devices: a roof-mounted natural

ventilation turret and a wall-mounted unit.

Louvres within these units divert external fresh air into the internal spaces creating a stack

effect which in turn removes stale air or CO² from the space. Airflow, temperature and CO²

within the system are monitored and controlled via pre-set sensors within a given space.

The Airtherm “Wind-iVent” is a natural ventilation system operating on established

aerodynamic principles. As external wind flows around the terminal itself, positive and

negative pressure areas are generated. On the positive side air enters the louvres of the

terminal and is directed down through the internal vanes into the room below. The negative

pressure on the leeward side of the terminal, induces air to leave the louvres, and stale air from

the room below rises and is expelled from the terminal. This process is aided by stack effect, i.e.

as cool air enters the windward side of the unit it descends into the room below, and the warm

stale air rises in the ducts facing the leeward side.

The size and type of application is virtually limitless. Additional roof-mounted turrets and wall

vents can be added for larger applications and rooms can be individually monitored and

controlled as necessary.

The features and advantages of such a system include:

•A fresh air supply for workers - proven to increase productivity & reduce staff sickness

•Naturally ventilated - reduce your energy costs and carbon footprint without the need for

mechanical ventilation

•Night time purge of stale air - creating a fresh working environment for staff the following

morning

•Better control of building temperature and CO² levels

•Free cooling

Natural Ventilation| Wind-iVent


Solar-iVent - Natural Ventilation Systems

How It Works

The Solar-iVent system benefits of a passive stack and an active stack system, similar to our

Wind-iVent range, but with the bonus of a free power source. Our Solar-iVent terminal

delivers fresh air and discharges unwanted stale air (CO²) from internal spaces, effectively

eliminating the need for traditional methods. The system incorporates a solar powered boost-

fan which provides additional 200l/s, 400l/s or 700l/s of fresh air within the compartment

below.

The photovoltaic panel collects daylight and convert this to electricity that is regulated via

the charge controller which charges the battery pack. The battery is charged whenever

there is enough available daylight to do so and even generates power on a dull day. The

Solar-iVent range have been designed to supply fresh air 24 hours a day.

The low powered fans are set as standard to simply switch on/off at maximum dampers or as

an optional feature they can be speed controlled variably in conjunction with the damper

positions.

Standard Components

☼ 12v or 24v DC Power Supply.

☼ 40w or 60w solar cell.

☼ DC carbon fibre battery Pack.

☼ Power management module.

☼ Low powered DC fan unit - 200L/s, 400L/s and 700L/s

☼ iVent control systems operate with peripheral (wind, rain,

temperature) devices to suit any and temperature application.

Natural Ventilation| Solar-iVent


Passive iStack Natural Ventilation Systems

The passive stack ventilation systems shall operate on well-established aerodynamic principals.

The manual windows at high & mid-level in each space will provide adequate ‘fresh’ input air at

a rate that complies with Building Bulletin 101 and CIBSE guidelines and provide no less than

8 L/s per person via means of positive pressure against the face of the building structure. The

positive input air is drawn across each area and through the unit by a negative extract pressure

at the ‘Pass-iVent’ louvre face at the far side of area. Contaminated Co2 laden stale air is then

drawn through the passive stack mounted at roof level.

The system should be intelligently controlled via room mounted temperature and Co2 sensors,

with occupancy Co2 levels taking presidency over that of temperature.

The passive stack roof ventilation terminals shall be constructed from fully welded corrosion

resistant type 1050 AH14 pure aluminium of 2-3mm thickness, and highly resistant to

weathering as well as chemical attack.

The units will be manufactured in accordance with BS EN ISO 9001, and to suit the

architectural and design parameters as indicated in the design specification and drawings.

Internal airways are to be protected by incorporating anti-bird mesh to the terminal louvers.

The units shall be powder coated to the RAL colour as indicated within the design specification.

If required the independent airflow testing & acoustic performance of the roof units from a

reputable source such as BRE or BSRIA to show compliance can be issued following order

placement.

Natural Ventilation| Passive-iStack

Natural Lighting Solutions

Day Lighting systems actively capture daylight from the rooftop and

project through a highly reflective tubing to where it’s needed. Solatube

light tube system uses the most advanced technologies to ensure that

the efficiency and performance of their systems is unrivalled.

Extension tubes are available in lengths of 610mm (straight) or 380mm

long incorporating a 0-30° adjustable angle along with the new 0-90°

angle unit. All reflective tubes – including adjustable tubes – are

manufactured from 99.7% reflective Spectralight Infinity material,

allowing tube lengths of up to 15 metres for the SolaMaster 330 DS.

The new Solatube 160 DS, 290 DS & 330 DS (250mm , 350mm and

510mm diameter respectively) set performance standards never seen

before. These systems feature patented Raybender® 3000 Technology

and LightTracker™ Reflector to deliver unprecedented levels of light –

higher even than previous Solatube models. Highly efficient and simple

to install, the Solatube Brighten Up® Series can transform dark or

windowless areas – ideal for residential applications such as kitchens,

bathrooms, hallways, stairwells, utility rooms, living areas, or may be

installed in multiples in larger, open workspaces such as corridors,

offices, consultancy rooms, store rooms, and washrooms.

Natural Ventilation| Lighting Solutions

Natural Lighting Solutions

DIFFUSER OPTIONS

The Brighten Up® Series offers a choice of

diffusers that incorporate Solatube® proprietary

lenses for highly effective light distribution.

Each features a sleek low-profile dress ring.

These attractive and stylish double-glazed

diffusers integrate seamlessly into most ceiling

surfaces with no visible fasteners.

VUSION™ DIFFUSER

The Vusion™ diffuser fits neatly to the

ceiling and delivers outstanding

natural light diffusion

through a prismatic lens.

OPTIVIEW® DIFFUSERS

The technologically advanced

OptiView® diffuser uses a multiple

Fresnel lens system with a stunning

architectural look to deliver crystal

clear daylight.

Available in three designs.

White Trim with OptiView® diffuser

Stainless-Tone with OptiView® diffuser

Frosted Shade with OptiView® diffuser

Natural Ventilation| Lighting Solutions


High Capacity - Our natural ventilation terminals

are perfect for both natural, passive and solar

powered options, with all four sides possessing a

guaranteed 50% free area allowing a more efficient

operation.

High Performance - With the addition of internal

vertical channels and integrated water defence, our

standard terminals can be converted into high

performance Class A rain protection (over 99%

effective).

Internal & Trunk – Housed inside the terminal is a

full height divider which keeps fresh and stale air

separate. Both the terminal base and ductwork

below are lined using a Class ‘O’ type 12.5mmTHK

acoustic foam. The foam offers an ideal acoustic

characteristics and the necessary fire performance.

Additional acoustic layers can be applied to

conform to any design criteria required. The roof

lid is also acoustically lined to prevent unwanted

noise transfer from heavy rain droplets, which can

be amplified into the occupied space below. This

method also avoids condensation forming on the

underside of the roof with cold air entering the

terminal and hot stale air rising from below.

Specification

Material: Extruded Aluminium

Construction: Blade mitres fully welded

Frame: None – internal supporting frame

Fixings: None – base suited to raised cill

or flat

Sizes: Range from 300mm – 6.0m

Height: 0.5m to 3m high

Finish: Standard – mill finish

aluminium

and option for powder coating

Natural Ventilation| Specification


Standard features

Ultra high shut off

Independent tests show no leakage below 10Pa;

the pressure most likely to be found in natural

ventilation installations.

Excellent thermal insulation

With a theoretical U value of less that 1 W/m2,

uPVC volume control dampers lose.

Options specified

Belimo /Siemens modulating actuators

factory fitted

The use of Belimo SM series modulating

actuators allows dampers to be set fully open,

fully closed or anywhere in between, for

maximum adjustability and assurance of

comfort.

uPVC volume control dampers

Ultra high shut off

In independent tests, large format uPVC

volume control dampers yielded leakage

results normally only achieved by dedicated

shut off dampers.

The VCD sent for testing had a nominal size of

1000mm x 806mm, the large size tantamount

to our confidence in the damper.

With even 10Pa rarely being exceeded in

natural ventilation situations, it is clear how

uPVC volume control dampers can enhance

the efficiency of your new natural ventilation

system.

Natural Ventilation| Dampers

Actuators

Belimo 24v 10nm Actuator

Siemens 10nm Actuator

Window Control Actuator

The actuator is controlled by means of a standard control signal

DC 0 ... 10 V. It opens to the position dictated by this signal. The

measuring voltage U allows the damper position (0 ... 100%) to be

electrically indicated and serves as a follow-up control signal for

other actuators.

Manual operation is possible with the self-resetting pushbutton

(the gearing latch remains disengaged as long as the pushbutton

is pressed).

Electronic motor driven actuators for three-position and

modulating control, nominal torque 5 Nm (GDB), 10 Nm (GLB) or

2 Nm (GSF), mechanically adjustable span between 0...90°, pre-

wired with 0.9 m long connection cables.

For damper areas up to 0.8 m (GDB) / 1.5 m (GLB), friction-

dependent for GSF…1 2 up to 0.3 m2

Suitable for use with modulating controllers (DC 0...10 V) or three-

position controllers for air dampers or air throttles.

The modulation of the window free area will be in tandem with

that of the ventilator stack for each space via 24vDc chain driven

actuators, having quiet operation. The external window openings

will operate in conjunction with the same control signal as the

damper stack openings, with the exception that the windows will

operate at five positions as opposed to the 10 positions of the

ventilator actuators to minimise window motor wear and ongoing

maintenance of the DC chain driven actuators.

Natural Ventilation| Actuators


Natural Ventilation Controls Our unique range of natural ventilation controls and intelligent sensors have been developed to deliver optimum control and ease of use of all our natural ventilation systems.

We can supply traditional combined sensors (with 0/10v outputs) or sensors with inbuilt BACnet communications (which supply a modulating control signal to end devices such as window actuator controllers). Our sensors are specifically designed to be simple to use.

We employ push button overrides, LED status indications and clear labelling to make things easier for the end users with the temperature control, the room set point for the control of the ventilation dampers can be adjusted in 10C increments between 210C and 280C with a seasonal change over and a night cooling option if a time clock or BMS time signal is available. Localised Heating can also be controlled and is set 20C below the room set point.

Temp and CO2 Sensor Room Temp Sensor

Our Range of Control Solutions

Standalone Sensors

* Room Temperature and C02 Sensor

* Room Temperature and RH Sensor

* Room Temperature and RH Sensor with manual

override

* Standard room Temperature Sensor

Intelligent Sensors

* Intelligent BACnet Room Setpoint Unit

* Intelligent Temperature and C02 BACnet

Sensor

* Intelligent Temperature BACnet Sensor with

manual override

* Intelligent Temperature and C02 level Indicator

Standalone Controllers

* Temperature and C02 Room Controller

* Temperature and C02 Room Controller with

manual override

* Temperature and C02 Sensor controller with

carbon monoxide indicator.

* Temperature room Controller with manual

override

* Temperature room Controller

Peripherals & Devices

* Chain Window Actuator

* Combined Weather Sensor

* Digital alarm Unit

* Digital Extension Timer

* Power supply Unit with Time Clock

* Window Control Module with Power supply.

Natural Ventilation| i-Controls


Dynamic Thermal Modelling

We can offer full dynamic thermal modelling

using the market leading software. This

software utilises building integrated

modelling whereby the same software can be

used for multi-faceted studies.

Airtherm Engineering Limited can carry out

a thermal model of the building to ensure

the ventilation conforms to building bulletin

101.

Natural ventilation modelling

We can model complex natural ventilation strategies making due allowance for:

• Wind and buoyancy driving pressures

• The action of occupancy behaviour regarding ventilation openings

• Automatic controls based on temperature or CO2 levels

• Night cooling and thermal mass

• Wind-iVent and other natural ventilation systems

This type of modelling is far more effective and removes the risk of under performing

ventilation systems within the building

We can advise on:

• The required number and size of ventilation solutions such as terminals, wall ventilation

and windows

• The value of night cooling and exposed thermal mass

• Appropriate strategies to meet BREEAM comfort criteria

Natural Ventilation| Thermal Modelling


Installation

Units can be installed on almost every roof including flat, pitched and even on the roof apex

where appropriate. The roof fabric of commercial applications has bearing on the openings and

roof plates that are required to install the systems competently. We offer a roof plate solution

for all situations, including self mount flashings and curb mount flashings with suitable

upstands. The options for each project will be discussed at the design stage in detail, including

the necessary openings that are required to suit our systems.

The ductwork for the units can pass through any floor level to transfer air within the building.

The units are capable of being controlled and linked to the buildings BMS to ensure dampers

are fully closed in the event of a fire. ‘Wind-iVent’ units can be controlled via master control

panels, room temperature sensors and CO² sensors.

We can also offer many bespoke natural ventilation solutions to clients. Our highly skilled

work force adapt at all types of light to medium metal fabrication including stainless steel,

aluminum and mild steel. GRP moulded products are also available, most suited to circular

formation.

The most common range starts from 500mm to 1200mm and can be combined with a natural

lighting system formally known as the ‘Lite-iVent’ . The Lite-iVent (Light & Vent) system uses

both the wind and sun, and offers a ZERO carbon footprint which has no impact on the

environment.

Our installation engineers are competent in their field and carry all necessary site certification

with CSCS cards, IPATH, PASMA and scaffold towers. Our engineers strive towards excellence

in each and every project they undertake.

Natural Ventilation| Installation

natural ventilation technical submission PASS-IVENT SYSTEMS MORRISON STORE

Airtherm Engineering have

recently completed the new

installation of two natural

ventilation systems for Derry

Building Services Limited

based in Newark.

Airtherm had previously

designed and selected the

correct systems to serve the

new hall within the School.

This process required critical

information to establish the

correct airflow and terminal

size, and working closely with

both Derry Building Services

and Leicester Council this

installation was a success.

WIND-IVENT SYSTEMS WESTCOMBE PARK SCHOOL

This new build school project is the

amalgamation of two local

Primary Schools John Roan School,

& Maze Hill School situated in south

east London.

The design of the school

incorporates various environmental

features to provide a low carbon

solution, including natural

ventilation & lighting systems

The terminal sizes have been

selected by our new computer

aided software ‘Wind-iCalc’

and fully conforms to the

CIBSE requirements.

NATURAL VENTILATION ABBEYWOOD SCHOOL

• Penthouse Passive Stack Terminals

• uPVC Volume Control Dampers

• 32no aqua blue ventilation turrets

• Insulated internal diverters

• Internal bird screen

• Access lockable doors

CASE STUDIES

Natural Ventilation| Case Studies

natural ventilation technical submission PASSIVE VENTILATION THE MIDLAND STUDIO

Airtherm Engineering have

recently completed the new

installation of two natural

ventilation systems at Midland

College Studio. Airtherm were

MVS Ltd first choice when

considering the scheme due

our knowledge and experience

on previous installations.

The project involved the use of

our Airtherm wall mounted i-

control solution which

consists of room mounted ABS

plastic control panel C/w in-

built temperature sensor, C02

self-calibrating carbon dioxide

sensor with traffic light

indicators, night time cooling

and external rain sensors. The

complete system was

commissioned by our

appointed engineers.

WIND-IVENT SYSTEMS HOLFORD DRIVE SPORTS CENTRE

The newly built sports centre is based in

Perry Barr, Birmingham and will hold high

end boxing national events.

There are six terminals located within the

sports hall and one situated within the

mezzanine floor area serving the office

space.

Airtherm also provided the control

solution which consists of standalone

room temperature and C02 sensors and

Red Lion interface panel.

The natural ventilation systems

have been designed in line with all

current publications such as CIBSE

guidelines, AM10 Natural

Ventilation in commercial buildings

and Building Bulletin 101.

NATURAL VENTILATION COPPICE PRIMARY SCHOOL

The Coppice Primary School is a

two form entry school ,though

larger than the average primary

school. Airtherm completed the

1st phase works by installing

two ‘Wind-iVent’ Systems to the

newly completed single storey

class rooms. The 2nd phase fix

features a further six 1.2msq

units for the Hall area which will

be used mostly by the Church,

and a further six 1.1msq units

serving the Classrooms

The new installation of fourteen

natural ventilation systems for

MVS Limited had been designed

and carefully selected from the

room data sheets provided,

ensuring adequate ventilation

rates for the pupils are met.

CASE STUDIES

Natural Ventilation| Case Studies


0844 809 2509 | airtherm.co.uk | [email protected]

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Mini natural ventilation brochure 2013