Thermal curtain on the gate to the workshop: characteristics, models and prices


two devices on the gate

A ther­mal cur­tain is a device that cre­ates an air bar­ri­er on the gate and pro­tects the micro­cli­mate of the room from the unfa­vor­able envi­ron­ment.

Despite the fact that the sys­tem requires a con­stant sup­ply of ener­gy, it pre­vents the premis­es from cool­ing down, reduc­ing the cost of heat­ing the work­shop.

What is a thermal curtain

Ther­mal air cur­tains pro­vide opti­mal cli­mat­ic con­di­tions in large premis­es (work­shops, ware­hous­es, work­shops, fac­to­ries, etc.). The main func­tions of these devices are

  • ener­gy sav­ing,
  • air con­di­tion­ing,
  • per­son­nel safe­ty.

The advan­tages of a ther­mal sys­tem include the fol­low­ing fac­tors:horizontal air version

  • main­tain­ing a micro­cli­mate at any time of the year;
  • keep­ing warm even when the gate is open;
  • cre­at­ing a bar­ri­er against dirt and insects;
  • unpre­ten­tious­ness in ser­vice;
  • secu­ri­ty enhance­ment.

Cons of the sys­tem:

  • burn­ing oxy­gen;
  • noise at work.

Types and their features

Air ther­mal cur­tain is a device with pow­er­ful fans used to pre­vent air or con­t­a­m­i­nants from pass­ing from one open space to anoth­er. Often used in cas­es where the gate to the work­shop remains open for a long time. They help pre­vent insects and debris from enter­ing the shop, cre­at­ing tur­bu­lence. Heat­ed mod­els are used to pro­vide extra warmth.

In some cas­es, the sys­tems are equipped with dri­ve­ways, car­go gates and win­dow open­ings. Cool­ing units are some­times used in com­bi­na­tion with cold stores.

  • Water used for addi­tion­al heat­ing of the perime­ter. Rep­re­sents a source of heat with open access to steam or hot water. Just like an air cur­tain, it pre­vents cold air from enter­ing the room and saves ener­gy con­sump­tion.
  • Del­uge is a sys­tem for extin­guish­ing fires in large rooms. Equipped with ther­mal fus­es to lim­it water flow. After acti­va­tion, all installed noz­zles open simul­ta­ne­ous­ly and the fire extin­guish­ing sys­tem oper­ates over the entire area. The main mech­a­nism for acti­vat­ing the sys­tem is a hydraulic and pneu­mat­ic dri­ve. This type of fire extin­guish­ing sys­tem is used for objects with increased fire haz­ard.
  • Ther­mal cur­tains from heat­ing are suit­able for cre­at­ing a wall of hot air, min­i­miz­ing heat loss from the premis­es in win­ter. In sum­mer, such devices pre­vent hot air from enter­ing chilled rooms. The main func­tion of these mod­els is to main­tain heat in a large room. In this case, they are one of the ele­ments of the heat­ing sys­tem and require con­nec­tion to the pipeline.gas curtain in the workshop
  • ver­ti­cal designed to install the sys­tem above the door­way of the gate in cas­es where the archi­tec­ture of the build­ing or the fea­tures of a par­tic­u­lar room do not allow the instal­la­tion of a hor­i­zon­tal ver­sion.
  • Hor­i­zon­tal is able to per­form addi­tion­al func­tions of the heater due to the wide range of action and fea­tures of the elec­tri­cal wiring. Such mod­els are often equipped with a fil­ter, valves and a high­ly effi­cient heat exchang­er with reserve stock. The aver­age length of hor­i­zon­tal mod­els is 2.5 m (with the pos­si­bil­i­ty of con­nect­ing addi­tion­al ele­ments). Some­times the body is made of stain­less steel.
  • Three-phase ther­mal cur­tains include air cur­tains, designed to coun­ter­act heat loss with a thin stream of air (along the width of the hole). Such sys­tems typ­i­cal­ly include an inter­nal heat source to raise the tem­per­a­ture of the air pass­ing through the device. In more com­plex sit­u­a­tions, an air cur­tain sev­er­al times the width of the open­ing is required. Non-stan­dard dimen­sions of the device require a three-phase pow­er sup­ply. Oth­er­wise, cold air will still get inside the room.
  • Steam have sim­i­lar func­tions with water types. The main dif­fer­ence is that instead of hot water, the device uses steam. The heat out­put depends on the tem­per­a­ture of the steam com­ing from the heat exchang­er.

Main technical characteristics of the thermal curtain

Dimen­sions vary depend­ing on cer­tain mod­els and door heights.

  • Large ver­sions for car­go and ware­house doors reach 2115 mm.
  • While com­pact mod­els have a size of no more than 1037 mm.
  • The least used is the mid­dle ver­sion with a size of 1576 mm.
  • Com­pact mod­els weigh no more than 90 kg, devices for instal­la­tion on high gates can reach 200 kg or more.

On aver­age, ther­mal cur­tains con­sume 5 kW dur­ing the entire work­ing time.

Auto­mat­ic adjust­ment with the cor­rect set­ting saves even more ener­gy. At the same time, prob­lems such as untime­ly switch­ing on of the unit dur­ing a peri­od of adverse con­di­tions are prac­ti­cal­ly min­i­mized, since the sys­tem auto­mat­i­cal­ly reg­u­lates the pow­er of the device and the tem­per­a­ture.

Design and thermal power calculation

The ther­mal pow­er of the device is deter­mined by the fol­low­ing for­mu­la:

Q = k × A × ∆T,

where:from space heating

k — heat trans­fer coef­fi­cient of the device;

A — sur­face area of ​​the device;

∆T — tem­per­a­ture dif­fer­ence.

For exam­ple, for a room of 16 square meters, you will need a device with a capac­i­ty of at least 1.6 kW. In this case, the equip­ment is locat­ed across the entire width of the gate. The per­mis­si­ble devi­a­tion must not exceed 50 mm.

When using ver­ti­cal sys­tems, it is rec­om­mend­ed to install two copies on both sides of the gate, as this reduces the like­li­hood of damp­ness and the devel­op­ment of fun­gus in the room.

Remem­ber one more rule - for every 10 square meters (with a ceil­ing height of up to 3 meters), 1 kW is con­sumed.

In this case, it must be tak­en into account that the ceil­ing and walls in the room must have their own ther­mal insu­la­tion. If it is absent, it will not be pos­si­ble to cre­ate a com­fort­able atmos­phere, since heat will pass through the walls.

When installing ver­ti­cal mod­els pow­ered by heat­ing, you can refuse to buy expen­sive mod­els with a heat­ing func­tion. In addi­tion to the fact that the tem­per­a­ture in the work­shop will be main­tained, this will save on the pur­chase and instal­la­tion of equip­ment, since mod­els with a heat­ing func­tion are much more expen­sive.

Installation and maintenance

If the air cur­tain comes with a wall mount­ing plate, do not attempt to replace it with a home­made one. If the kit con­tains addi­tion­al elec­tri­cal acces­sories, install them in accor­dance with the attached instruc­tions.

Before instal­la­tion, make sure that the pow­er sup­ply in the room is suit­able for using the pur­chased device.

For fur­ther work you will need:

  • per­fo­ra­tor,
  • lev­el,
  • sta­ples,
  • anchor screws,
  • bolts,
  • screw­driv­er.

How to fix the curtain correctly

water curtain installation

  1. Deter­mine the exact instal­la­tion loca­tion.
  2. Remove the pro­tec­tive shield by remov­ing the screws from the top, bot­tom, and front of the case.
  3. Most often, the cur­tains are equipped with four holes designed for wall mount­ing. If there are no holes, drill them your­self.
  4. When using anchors for fas­ten­ers, make sure they can sup­port the weight of the unit.
  5. Fix the device, being care­ful not to touch the fan.
  6. Make sure the struc­ture is secure­ly fas­tened.
  7. Install a pro­tec­tive screen.


To con­nect the device, you must have expe­ri­ence with elec­tric­i­ty. Oth­er­wise, con­tact a qual­i­fied tech­ni­cian!

To con­nect a device, fol­low these steps:

  1. Remove the cov­er of the com­part­ment intend­ed for con­nec­tion to elec­tric­i­ty.
  2. Con­nect the pow­er sup­ply and con­nect all the wires in accor­dance with the sup­plied dia­gram (depend­ing on the mod­el con­fig­u­ra­tion).
  3. If you are sure that every­thing is con­nect­ed cor­rect­ly, click on the start but­ton.

Do not put on a pro­tec­tive screen before the test oper­a­tion of the device, as fur­ther rein­stal­la­tion of the equip­ment or its recon­nec­tion may be required.

  1. If the fans are run­ning, and the device makes a char­ac­ter­is­tic noise, then every­thing is con­nect­ed cor­rect­ly, the sys­tem is ready for con­tin­u­ous oper­a­tion.
  2. If you expe­ri­ence prob­lems such as the fan not work­ing or there is no pow­er sup­ply to the device, con­tact a spe­cial­ist, as it is not rec­om­mend­ed to car­ry out repair work with­out a cer­tain qual­i­fi­ca­tion.


three phase big curtain in cold roomAir cur­tains require min­i­mal main­te­nance as most mod­els are ful­ly auto­mat­ed. The only inter­ven­tion is reg­u­lar clean­ing.

Remem­ber — the dirt­i­er and dusti­er the room, the more often and more thor­ough­ly you need to clean.


  1. Turn off the pow­er and lock the ser­vice pan­el to pre­vent acci­den­tal pow­er on.
  2. Remove the intake grille to access the blow­er hous­ing and motor.
  3. Remove the bot­tom pan­el to access the fan hous­ings.
  4. Remove dirt, dust and debris.
  5. Return all com­po­nents to their orig­i­nal state.

Popular manufacturers, models and prices

Man­u­fac­tur­er Mod­el price, rub.
Resan­ta TZ-3S 3363
Tim­berk THC WT1 6M 11390
Rovex RZ-0915С 11090
Rovex RZ-0610С 7290
Resan­ta TZ-5S 6000
Shiv­a­ki SHIF-EAC90W 6819
Tim­berk THC WS3 3MX AERO 11000
Tim­berk THC WS3 5MX AERO 11195
Neo­cli­ma ТЗТ-308 9500
Trop­ic K‑3 7660

The fol­low­ing video clear­ly shows how to use an air cur­tain in an unheat­ed room:

Consumer reviews

A few reviews from online stores and from the pages of man­u­fac­tur­ers:

“The air com­ing from this mod­el turned out to be much cold­er than stat­ed in the spec­i­fi­ca­tions. In order for the device to start work­ing at full pow­er, you need to wait a while from the moment you turn it on.

Sergey, about the Resant TZ-3S mod­el

“After a major over­haul in our work­shop, it was nec­es­sary to install an air ther­mal cur­tain. I liked the device because it has two modes — hot and cold air (in sum­mer)”.

Ivan Alexan­drovich, about the Rovex RZ-0915С mod­el

“Not a bad device, a lit­tle bulky, but effec­tive. I rec­om­mend”.

Alex­ey, Kemero­vo, about Tim­berk THC WS3 5MX AERO

Selection advice

To make the right choice and not spare the mon­ey and effort spent, it is rec­om­mend­ed to heed the advice of mem­bers of the Amer­i­can Soci­ety of Heat­ing Engi­neers:

  1. A low-qual­i­ty mod­el con­sumes more ener­gy than a more expen­sive effi­cient coun­ter­part.
  2. The air cur­tain is designed not to heat the room, but to reduce heat loss.
  3. Do not con­fuse air cur­tains with heaters, as their main func­tion is to store heat local­ly.
  4. It is worth choos­ing equip­ment based on the size of the gate open­ing, and not guid­ed by the pow­er of the device.
  5. The best option for instal­la­tion is hor­i­zon­tal­ly above the gate or ver­ti­cal­ly on the sides.
  6. Don’t for­get to take into account the char­ac­ter­is­tics of the build­ing (height, ori­en­ta­tion, etc.) and exter­nal cli­mat­ic con­di­tions.
  7. Use a sta­ble pow­er source.


Air cur­tains help busi­ness­es save ener­gy by reduc­ing the amount of cold air enter­ing a build­ing. In order for the air cur­tains to func­tion ful­ly, not only high-qual­i­ty instal­la­tion is impor­tant, but also the cor­rect selec­tion of the device. If the instal­la­tion is incor­rect, and the device is much small­er than the gate itself, the sys­tem will not bring any ben­e­fit, and the pow­er con­sump­tion will increase sev­er­al times.

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