Ahşap ve Demir Boyaları

[Construction Section 50]

Warm Air Heating

The hot air heating system uses air as heat sources. It is produced in hot-air heating air ducts in the rooms. Even as a hot air heating system is created, but in the details differently, in the 1st Invented century BC and today in digs Hypo chasten air heater reconstructed.

Profitability and operating costs

The economics of a heating system depends on acquisition and operating costs of the available financial subsidies.

For the evaluation of the overall effectiveness is the annual efficiency more important than efficiency.
The annual utilization ratio describes the relationship between supplies of this useful to set fuel quantity. The type of annual usage levels or NORM USE GRADE takes into account not only the losses that occur during burners, but also all losses, during the burner stalemate.
The efficiency includes only those losses during burner. In one year, but only boilers maturities of approximately 1,800 hours, the remaining time is the burner. An efficiency figure is only a snapshot, based on performance. The utilization rate, however, the energetic efficiency over a certain period, such as one year.

Calculation of a space heater

To the power needs of a heating for a closed room to determine the calculation of the heat loss through the space boundary surfaces (walls, ceiling, floor, doors, windows) is necessary. The surfaces of the heat off as a heating power must be fed, (next: = performance in W (1 nm or s = 1 J or W = 1) to understand).

U = heat transfer figure in W or (m² K )
A = area in m²
T1 = outdoor temperature in ° C
T2 = room temperature in ° C