Hello. This is my first post, so please do not judge strictly.
  I am the owner of a small company, in combination I set up all my servers myself.  I have a fairly simple network architecture with four 19 "physical servers, which recently lost their kolokshen to the server landlord. 
      
        
        
        
      
    
      
        
        
        
      
      There was a question about the allocation of a server room from the total area of ββthe office with the compacting of the team or the installation of a silent cabinet, the principle of which has already been described in HabrΓ©. 
Then I will try to determine for myself: build the simplest server room or install a silent cabinet.

From the calculations, I will throw out the same work for both cases, such as: power supply, switching, and other identical work.
  Calculating the cost of ownership server 
      
        
        
        
      
    
      
        
        
        
      
      Input data for the calculation will be: 
      
        
        
        
      
    
      
        
        
        
      
      - the minimum server area according to the ANSI / TIA / EIA-569-B standard should be at least 14 square meters, but foreign standards are not decree for us.  We took as a basis 8 sq. M.  m., so that the cabinet could be approached from either side; 
      
        
        
        
      
      - rental rate per sq.m.  - 1000 rubles per month; 
      
        
        
        
      
      - minimal construction work on the construction of the server: plasterboard partitions, noise insulation, wide door, fire alarm, lighting, ceiling alteration; 
      
        
        
        
      
      - The simplest cooling system for household air conditioning without redundancy; 
      
        
        
        
      
      - sufficient budget server cabinet CMO 42U with ventilation modules ; 
      
        
        
        
      
      - tenure - 3 years, since in our country any leader from the field of small and medium-sized businesses does not look beyond 3 years. 
  Payment: 
      
        
        
        
      
    
      
        
        
        
      
      - Cost of ownership for 3 years - 1000 rub. / Sq. M. * 8 sq. M. * 36 months.  = 288 000 rubles. 
      
        
        
        
      
      - the cost of building a server - 50 000 rubles. 
      
        
        
        
      
      - the cost of installation of air conditioning - 60 000 rubles. 
      
        
        
        
      
      - the cost of the cabinet with ventilation ventilation - 66,500 rubles. 
      
        
        
        
      
    
      
        
        
        
      
      TOTAL for 3 years: 464,500 rubles. 
  Calculating the cost of owning a silent cabinet 
      
        
        
        
      
    
      
        
        
        
      
      The input data for calculating the cost of ownership of an active noise-canceling cabinet Silentium : 
      
        
        
        
      
    
      
        
        
        
      
      - the area occupied by a case - 1 sq.m .; 
      
        
        
        
      
      - rental rate per sq.m.  - 1000 rubles per month; 
      
        
        
        
      
      - air conditioning in the office is already installed; 
      
        
        
        
      
      - tenure - 3 years. 
  Payment: 
      
        
        
        
      
    
      
        
        
        
      
      - cost of ownership for 3 years - 1000 rub. / Sq.m.  months * 1 sq.m. * 36 months  = 36 000 rub. 
      
        
        
        
      
      - the cost of a typical silent cabinet VIST AcoustiRACK - 420 000 rubles. 
      
        
        
        
      
    
      
        
        
        
      
      TOTAL for 3 years: 456,000 rubles. 
  SUMMARY 
      
        
        
        
      
    
      
        
        
        
      
      We will summarize unscientific - without weight coefficients, trite by the number of pluses. 
| Server room | Silent cabinet | ||
|---|---|---|---|
|  | cost of ownership for 3 years: 464,500 rubles. |  | cost of ownership for 3 years: 456,000 rubles. | 
|  | most of the investment "spread" for 3 years |  | most of the investment must be allocated immediately | 
|  | when renting additional space for the server room, there may not be small spaces in the business center or there may be no free spaces at all |  | You can always allocate 1 sq. m. from the already rented area without serious sealing of employees | 
|  | allocation of space for the server in an already operating office is associated with the compaction of employees |  | You can always select from the available office space 1 sq. m. without staff seals | 
|  | not every landlord will allow office redevelopment |  | in accordance with the landlord is not necessary | 
|  | the need for construction and electrical work |  | electrical work only | 
|  | when moving the server will have to build again |  | mobility - transported wherever it wanted | 
| Rating: 1 | Rating: 6 | ||
  Frankly, for all its obviousness, I have not yet made a decision. 
      
        
        
        
      
      And what would you choose?