Study about central heating design including such elements as thermal comfort, building design, outside design temperatures, interior design temperatures and ventilation rates, irregular heating.

Central Heating Design

Central Heating Design
Outside design temperatures

The British standard BS 5449 claims that the outside design temperature has to take into account all but the most severe conditions and a figure of -1 degrees C is typically selected. Lots of builders still bank on this minimum BS Standard of -1 degrees C independent of the predictable outside temperature extremes.

Temperature differences around the UK over the previous few winters have confirmed this minimum standard to be insufficient particularly during severe weather conditions. A recommended basic supposition to system design is the variety of local weather condition data, since supreme maxima or minima are inappropriate, as they would cause unprofitable design temperatures.

Interior design temperatures and ventilation rates

The next interior design temperatures and air stream rates are suggested for the plan of full and part central heating systems and are grounded on supplying the client with satisfactory comfort levels throughout. The lowest design temperature and air stream rates which are compulsory according to BS 5449: 1990 are provided in the table below.

 RoomTemp Air Change 
 Lounge sitting room 211.5 
 Living room 21 1.5
 Dining room 21 1.5
 Kitchen 18 2.0
 Breakfast room 21 2.0
 Kitchen/Breakfast 21 2.0
 Hall 18 2.0
 Cloakroom 18 2.0
 Toilet 182.0
 Utility Room 181.5
 Study 211.5
 Games Room 211.5
 Bedroom 181.0
 Bedroom/en suite 18 2.0
 Bedsitting 211.5
 Bedroom/Study 211.5
 Landing 18 2.0
 Bathroom 22 2.0
 Dressingroom 21 1.5
Storeroom  16 1.0



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