Ventilation and air-conditioning
RU EN

Commercial real estate


Commercial real estate properties are the principal users of RU-FLEX foam rubber insulation. Heating, ventilation and air-conditioning systems, cold and hot water supply systems – for each area there is a ready-made solution to increase the efficiency of buildings and structures.

Ventilation and air-conditioning in modern buildings is a prerequisite for their successful operation. RU-FLEX thermal insulation structures are ready-made, tried and tested solutions based on the experience of world leaders in the field. Aesthetic appearance and ease of installation are important criteria in choosing RU-FLEX materials for the design and construction of commercial buildings

To help choose the right RU-FLEX VENT-SK and RU-FLEX ST insulation thickness, we have prepared ready-made solutions (basic calculations).

Problem and solution

Calculation of insulation thickness for the supply ventilation system.

Initial data

  • Heat transfer medium: air
  • tо = 20 ˚С – temperature in the shopping center;
  • tm = -25 ˚С – temperature of the heat transfer medium in the duct, winter time;
  • ϑв = 4 м/с – velocity of the heat transfer medium;
  • ϕ = 60 % — relative humidity in the shopping center.
Without cover layer:
Duct dimensions, mm Calculated insulation thickness RU-FLEX VENT-SK, mm Recommended insulation thickness RU-FLEX VENT-SK, mm
150х150 15,71 Р19
200х200 15,98
450х450 16,47
900х600 16,65
With foil-covered coating (METAL):
Duct dimensions, mm Calculated insulation thickness RU-FLEX VENT-SK METAL, mm Recommended insulation thickness RU-FLEX VENT-SK METAL, mm
150х150 22,87 Р 25
200х200 23,38
450х450 24,4 Р 25
900х600 24,78

P-Designation of the roll-fed material.
Calculations made according to SP 61.13.330.2012 RF

* If a ready-made thermal insulation solution is a construction consisting of two or more layers, it is recommended to use thermal insulation material ST with ALU coating.

Calculation of insulation thickness for the exhaust ventilation system

Initial data

  • Heat transfer medium: air
  • tm = +20 ˚С – temperature of the heat transfer medium in the duct;
  • tокр = -25 ˚С –ambient temperature (coldest five-day period (0.92) in Moscow);
  • ϑв = 4 м/с – coolant velocity;
  • φ = 80 % — relative humidity of the ambient air.

According to the technical specifications (TS), RU-FLEX outdoor installation is possible if coatings are used to protect the surface of the products from weathering.

With foil-coated cover layer (PROM ALU):
Duct dimensions, mm Calculated insulation thickness RU-FLEX ST PROM ALU, mm Recommended insulation thickness RU-FLEX ST PROM ALU, mm
150х150 16,6 Р19
180х180 16,79 Р19
200х200 16,87 Р19
450х450 17,37 Р19
900х600 17,6 Р19

Calculations made according to SP 61.13.330.2012 RF