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Indoor Climate SystemsAt a Glance

Air means life. Fresh, clean air is the basis ofhealth and high quality of life. Taking a deepbreath we stock up on energy, generating vitalityand drive. With fresh air and a good climatepeople feel strong, powerful and motivated.

Indoor Climate Systems from Hoval:More Benefit For You

Low purchase costs. Right fromthe purchase of an indoor climatesystem from Hoval cost advan-tages arise: The patented airdistributor – called Hoval Air-Injector – works so efficiently that,in comparison with other systems,an air quantity about 25 % to 30 %smaller is sufficient to set up therequired conditions. Therefore,a smaller plant can be installedresulting in lower investmentcosts.Unlike centralised plants, thedecentralised system from Hovalnormally works without supplyand extract air ducting. Conse-quently, space requirements andinstallation costs for ducts do notapply.The indoor climate units aredelivered fully assembled and pre-wired; therefore they are easy andquick to install. The installationunder the ceiling or in the roofsaves valuable floor space. Thesystem is easy to extend or toadapt to changing operating re-quirements. And the investmentcan be made in phases – in sev-eral construction stages.

Low running costs. Indoor climate systemsfrom Hoval are masters in saving energy. Theyreduce undesirable temperature stratificationin the room, lowering heat loss through theroof to a minimum value. And thanks to thehigh ventilation efficiency, the overall airquantity that needs to be handled and treatedis smaller, saving electrical drive power andlowering ventilation heat requirements. Alsothe extract air energy is utilised – dependingon project-specific requirements units withmixed air operation or with energy recovery areused.Specially developed control systems, tailoredto the decentralised system, reliably ensure theoptimum use of energy resources and thuslowest running costs.

Problem-free servicing. Servicing andmaintenance works may be carried out duringnormal working hours; it is not necessary toswitch of the whole plant.

Environment-friendly. Indoor climate systemsfrom Hoval are environmentally sound thanksto their responsible usage of energy. Also theuse of low-emission fuels and the utilisation ofcondensation technology for heat generationreduces the effect on the environment.

The decentralised solution forventilating, heating and coolinglarge spaces. Fresh air meansquality of life. Comfort in largespaces is a fundamental conditionof their cost-efficient utilisation.Setting-up the right indoor climatein large spaces is subject tocomplex requirements. This fact istaken into account by indoorclimate systems from Hoval:These are modular, decentralisedsystems and hence extremelyflexible in adaptation to thespecific room use.

More comfort. Indoor climatesystems from Hoval make forgood air. Fresh air is injected intothe room from the top throughpatented, adjustable vortex airdistributors. The occupied area isthoroughly ventilated withoutcausing draughts; a uniform tem-perature and air quality throughoutthe room results. The people in theroom feel well. The climate is idealfor productive working, for relaxedshopping, for an informative tradefair visit, for performing sportsexercises, etc.

The individual units are decentrally, i.e. spread aroundthe room, installed under the ceiling or in the roof. Thisarrangement provides decisive advantages:— Thanks to the air distribution from high to

low level undesirable temperature strati-fication and thus heat loss through the roofis significantly reduced.

— No air ducts – which are difficult to clean –are needed; therefore the supply air staysclean and hygienic.

— Thanks to the use of several self-containedair handling units the system is very reliableand easily adapts to changing operatingconditions.

Wall heating Hoval system

Air supply from abovereduces temperaturestratification

Tailor-made control system. The DigiNet is a controlsystem that has been specially developed for Hoval indoorclimate systems. It takes into account all specific require-ments for energy-saving operation as well as Hoval's longexperience with decentralised ventilation plants. The DigiNethas been developed in close collaboration with Siemens,who also supply the hardware components. With DigiNeteach ventilation unit is individually controlled, i.e. thedecentralised idea is consistently followed through in thecontrol system.

Indoor Climate Systems from Hoval:The Tailor-Made Solution

Range of application. Indoorclimate systems from Hoval providefresh air supply and extract air re-moval as well as heating and coolingin large spaces. They are ideallysuited for application in assemblyand production halls, high rackingwarehouses, aircraft hangars, ship-yards, maintenance workshops,shopping centres, do-it-yourselfstores, exhibition halls, indoorswimming pools, etc.

Construction and function. Indoor climatesystems from Hoval have a modular designprinciple. An installation comprises severalself-contained units with air flow rates up to10'000 m³/h (about 2.8 m³/s). There aredifferent unit types, that may be combineddepending on project-specific requirements toform the optimum, ideally suited solution forthe individual application:— RoofVent® units are roof ventilation units

providing fresh air supply and extract airremoval. They heat and cool the supply airvia built-in heat exchangers, save energy byheat recovery or mixed air operation andeven may be equipped with a facility fordecentralised heat or cool generation.

— TopVent® units are recirculation or supplyair units for heating and cooling in recircu-lation, mixed air or fresh air operation. TheTopVent® curtain is used as an air curtain.

— The Air-Injector is a patented, adjustableair outlet providing efficient supply airdistribution. It is part of nearly all Hovalindoor climate units; yet it is also availableas a separate component for fitting to airducts.

Air-Injector

Automatically adjustablevortex air distributor

TopVent® HV

Recirculation unit heater forrooms with up to 6 m height

TopVent® curtain

Air curtain

Technical data

Air flow rate m³/h

Heat output kW

Reach mx m

Weight kg

D-3 D-5 D-8

3000 5000 8000

– – –

17 x 17 21 x 21 26 x 26

40 40 57

HV-2 HV-3 HV-5

2000 3425 5250

up to 16 up to 29 up to 47

7 x 7 9 x 9 11 x 11

17.5 28 42

CUR-2 CUR-3 CUR-5

2000 3425 5250

up to 16 up to 29 up to 47

up to 6 m door height

22 36 53

Draught-free air distribution withadjustable vane arrangement(manually or automatically controlled)

Heating of rooms with up to 6 mheight in recirculation operation(with connection to central boilersystem)Air distribution with manuallyadjustable guide vanes

The Air-Injector introducessupply air at various tempera-tures and flow rates into theoccupied area of high spaces,without causing draughts. Thisis achieved by means of acontrollable vane arrangementallowing continuous adjustmentof the air discharge anglebetween vertical to horizontal.

Overviewof functions

Isothermal Heating Cooling

The air distributor is adjustableto changing operating condi-tions: manually by means of aremote hand control andactuator or automatically withthe VarioTronic electroniccontrol.The Air-Injector is suitable forinstallation on supply air ductsor in ventilation units. It is a corecomponent of the Hoval indoorclimate systems.

The TopVent® HV is the simplestunit in the Hoval indoor climatefamily. It has been developed forcost-efficient heating of roomswith up to 6 m height.The unit is installed under theceiling. It takes in room air,heats it by means of the heaterbattery and injects it back intothe room via individually adjust-able guide vanes.The unit is available in threesizes, each with a two-speedfan as standard so that alto-gether six different heat outputscan be selected.The optimum use of energy andthus cost-saving operation ofthe units is ensured by thespecially developed TempTronicroom temperature controller.

TempTronicwall unit

The TopVent® curtain is a recir-culation unit heater with specialoutlet nozzle; it is used as an aircurtain for doors of up to 6 mheight.Several TopVent® curtain units(depending on the door width)are fitted above the door. Theunits draw in room air, heat itand blow it downwards. The aircurtain so generated minimisesexternal influences on theindoor climate. It prevents coldair from entering and increasesthe useful floor area in thespace.The units are equipped withtwo-speed fans as standard.The corresponding control unitallows for manual or automaticcontrol.

Prevents energy loss through opendoorsCreates comfort near doorsHeating in recirculation operation(with connection to central boilersystem)

TopVent®

curtain

Technical data

Air flow rate m³/h

Heat output kW

Cool output total kW

Reach mx m

Weight kg

TopVent® DHV

Recirculation unit for heatinghigh spaces

TopVent® DKV

Recirculation unit for heatingand cooling high spaces

TopVent® commercial

Roof unit for ventilating, heat-ing and cooling supermarkets

RoofVent® LH

Roof ventilation unit withoptimum fresh air rate

RoofVent® LHW

Roof ventilation unit with heatrecovery

RoofVent® condens

Roof ventilation unit withcondensing gas boiler

RoofVent® direct cool

Roof ventilation unit withsingle-split cooling system

DHV-6 DHV-9 DHV-10

6100 8700 9700

up to 89 up to 134 up to 156

– – –

23 x 23 30 x 30 33 x 33

97 148 182

DKV-6 DKV-9

4900 8700

up to 84 up to 144

up to 26 up to 71

20 x 20 30 x 30

160 210

CUM-9 CAU-9

7800 6800

up to 126 up to 179

up to 68 up to 88

28 x 28 25 x 25

420 500

LH-5 LH-8

5500 8000

up to 77 up to 112

up to 40 up to 70

21 x 21 26 x 26

486 686

LHW-5 LHW-8 LHW-9

5500 8000 8800

up to 99 up to 147 up to 157

up to 40 up to 70 up to 97

21x21 26x26 28x28

491 692 692

Heating (with connection to centralboiler system)Recirculation operationAir distribution with the Air-InjectorFresh air supply*Mixed air operation*Air filtering*

Overview offunctions

The TopVent® DHV has beenspecially developed for applica-tion in high spaces. Thanks toits powerful and efficient airdistribution the unit heatercovers a large area. Thereforefewer units are needed, allowinglower investment and installa-tion costs.Three unit sizes, two-speedfans, different heater batterytypes and a whole string ofaccessories provide a tailoredsolution for each application.The TopVent® DHV can even beextended to a supply air unit.Furthermore, also specialbatteries (steam, electricalheating) are available.

Heating (with connection to centralboiler system)Cooling (with connection to waterchiller)Recirculation operationAir distribution with Air-InjectorFresh air supply*Mixed air operation*Air filtering*

Heating (with connection to centralboiler system)Cooling (with connection to waterchiller)Fresh air supply*Mixed air operation*Recirculation operationAir distribution with Air-InjectorAir filtering*

CON-8

8000

up to 63

up to 70

26x26

845

DIC-5 DIC-8

5000 7650

up to 93 up to 142

up to 46 up to 65

21 x 21 26 x 26

971 1392

Optional:Filter boxand mixedair box

The TopVent® DKV is similar tothe recirculation unit heaterTopVent® DHV, but it can beused for cooling as well asheating. The major difference isthe built-in condensate sep-arator. In addition, the unit isinsulated to prevent conden-sation on the outside of thecasing.The TopVent® DKV, too, isavailable with numerous outputratings. A wide range of acces-sories allows for adaptation todifferent requirements.For quick and easy design de-tailed planning documentationcan be supplied. Take advan-tage of the extensive experienceof the Hoval technical advisoryservice.

The TopVent® commercialcreates the right indoor climatein hypermarkets and super-markets. It has been speciallydesigned for this application:The units are easily and quicklyinstalled in the roof with thecorresponding roof frame. Theydo not protrude far into theroom and maintenance worksare carried out from roof level.Special sound insulationensures particularly quietoperation.The unit is available in twodifferent designs:– TopVent® commercial AU for

heating and cooling in freshair, mixed air or recirculationoperation

– TopVent® commercial UM forheating and cooling in re-circulation operation

The RoofVent® LHW ensuresfresh air and the correct roomtemperature in large spaces.The unit incorporates a highlyefficient plate heat exchangerthat recovers energy fromextract air and transmits it tothe fresh air.

Air supply andextraction. TheRoofVent® LHWinjects fresh outsideair and extractsstale room air.

Depending on the heat demand,heating and heat recovery arecontrolled.

Recirculation. Whenno fresh air supply isrequired (e.g. duringthe night or for pre-heating in themorning), the space

is heated in cost- and energy-saving recirculation mode.

Heating (with connection to centralboiler system)Cooling* (with connection to waterchiller)Fresh air supplyExtract air removalRecirculation operationEnergy recoveryAir distribution with Air-InjectorAir filtering

* optional

The RoofVent® LH unit providesair supply and extraction as wellas heating and cooling in largespaces. It makes use of theextract air energy in mixed airmode. The DigiNet controlsystem, which has been special-ly developed for Hoval indoorclimate systems, constantlyoptimises the fresh air rate: justas much fresh air is taken in asnecessary to maintain the roomtemperature without additionalheating or cooling. A minimumvalue can be set.Therefore the RoofVent® LH is agood choice for applicationswhere fresh air is desired butnot necessary on a large scale.If more than 40 % of fresh air isconstantly required, then a unitwith heat recovery is moreeconomical.

Heating (with connection to centralboiler system)Cooling* (with connection to waterchiller)Fresh air supplyExtract air removalMixed air and recirculation operationAir distribution with Air-InjectorAir filtering

Heating (with integrated condensinggas boiler)Cooling* (with connection to waterchiller)Fresh air supplyExtract air removalMixed air and recirculation operationEnergy recoveryAir distribution with Air-InjectorAir filtering

The RoofVent® condens per-forms similar tasks to theRoofVent® LHW. Its speciality:The ventilation unit includes ahigh efficiency condensing gasboiler with modulating burner.Thanks to this decentralisedheat generation facility no plantroom is needed. Connection toa central boiler system is unnec-essary; hence the installationcosts are lower.When the RoofVent® condens isat work, triple energy-savingtakes places:– The condensing boiler guar-

antees highest efficiency inheat generation.

– The plate heat exchangerrecovers energy from extractair.

– At very low outside tempera-tures the unit switches tomixed air operation.

The RoofVent® direct cool isused for air supply andextraction in large spaces. It issimilar to the RoofVent® LHW,however it is equipped with asingle-split cooling system fordecentralised cooling. Insteadof a LPCW cooling coil, anevaporator coil is installed inthe roof ventilation unit. Acondensing unit is fitted nearbyon the roof. Consequently, acentralised cold supply in theform of a water chiller isunnecessary.The RoofVent® direct cool maybe utilised for heating as well:a separate heating section withLPHW or electric heater batteryis installed in the ventilationunit.

Cooling (with integrated single-splitcooling system)Heating* (with connection to centralboiler system)Fresh air supplyExtract air removalRecirculation operationEnergy recoveryAir distribution with Air-InjectorAir filtering

Experience Over Many YearsGuarantees Sound Advice.

Hoval – the leading manufacturer of decentralisedindoor climate systems. Hoval, a group with productionplants and sales offices throughout Europe, is a pioneer inheating technology. Today the product range includes notonly boilers but also air heaters, plate heat exchangers,thermal wheels, radiant tube heaters, waste incinerationplants and steam boilers.Since 1977 Hoval has manufactured ventilation units in theSchaan factory. The resultant experience forms the basisfor Hoval application and technical advisory service.

Great BritainHoval Ltd.Northgate, NewarkNotts, NG24 1JNtel 01636 672 711fax 01636 673 [email protected]

Republic of IrelandMasterair Sales Ltd.John F Kennedy Park, Killeen RoadDublin 12tel 01 460 2188fax 01 460 [email protected]

Vaduz factory (Liechtenstein)

Pi5

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2 –

01/2

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Certified quality. The Hoval quality system is tested andcertified under ISO 9001. This means that optimisedprocedures are adhered to in development, fabrication anddistribution – to guarantee Hoval quality.

International references in 25 countries. Numerousfactories and work places in 25 countries have opted forventilation units from Hoval during the past few years. Theyall acknowledge the problem-free operation and the largesavings in heating energy. References are available uponrequest.

Hovalwerk AGAlte Zollstrasse 11, FL-9494 Schaan, Liechtensteintel +423 237 01 01, fax +423 237 01 [email protected], www.hoval.com

Conservation of Energy – Protection of the Environment

Schaan factory (Liechtenstein)

Quality


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