Protective and ventilation grates

TARNAWA offers protective and ventilation grates. Basic material for grates production is steel. Grates can be powder coated, offered colors are: white, gold, silver or copper.

We also produce grates from zinc coated and stainless steel sheets in two versions – with and without shutter. The design of grates enables quick assembly and disassembly (for cleaning) as only the frame of the grate is attached to the opening.

Grates are used as:

  • aesthetic covers for warm air chimney outlets;
  • aesthetic covers for outlets from lines distributing warm air;
  • aesthetic covers for ventilation lines;
  • aesthetic covers for side chimney outlets as they are resistant to changing weather conditions;
  • aesthetic covers for air outlets in air vents.

According to the norm Pn-83/B-0340 ventilation systems in buildings should ensure air supply from outside to the rooms, kitchen, bathroom as well as exhaust of fumes. Natural, gravitational ventilation depends on outer and inner temperature difference and on air movement (wind). It often fails in summer when inner and outer temperatures are on the same level and that can lead to the disappearance of chimney draught. In winter it is necessary to take fumes out to the chimney conduit (ventilation conduit).

Air ventilation for boiler-room should be designed to ensure proper amount of air needed for fuel combustion The approximate amount for a gas furnace is 1.6 m³/h of air for 1kw of furnace’s capacity. In dwelling houses fresh air should be delivered as stated in the norm Pn-83/B-0340 and showed below:

Room Air volume stream m³/h Remarks
Dwelling houses    
Kitchen with a window -  
– a gas or coal cooker 70  
– an electric cooker for 1 or 2 persons 30  
– an electric cooker for 3 persons 50  
Kitchen without window -  
– with electric cooker 50  
Bathroom 50  
Toilet 30  
Utility room without window 15  
Rooms, bedrooms 20 per person
Group dwelling buildings (hotels, dormitories etc.)    
Common room, dining-room 20 per person, min. one change per hour
Rooms, bedrooms 20 per person
Toilets    
– single 40  
– collective 50 25 m³/h urinal
Showers – single 30 Collective, min 5 changes per hour
Smoking 35 Per person, min 10 changes per hour
Public utility buildings    
Rooms for permanent and temporary stay for people    
– no permit for smoking 20 per person
– permit for smoking 30 per person
Nursery, kindergarten 15 per person

Implemented Quality Management System ITB/-023/S fulfilling the quality norms of ISO 9001 ensures that ventilation and protective grates produced in TARNAWA meet all the requirements of the norm. All the raw materials, paints and  components used to produce the grates are attested which allows us to mark our products with CE sign.

Contact us

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Wytwórnia Elementów Kominowych TARNAWA Spółka Jawna
L.Wajda, W.Wajda, R.Nazimek

ul. Giełdowa 22, 33-100 Tarnow, Poland

tel. 14 63 18 300
fax: 14 63 18 301

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