New Buck Corporation 384 Manual De Usuario

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   1.  Determine  the  volume  of the space  (length  x  width  x height). 
       Length x Width x Height =_________cu.ft.(volume of space) 
       EXAMPLE: 20 ft.(Length) x 16 ft.(Width) x 8 ft.(ceiling Height)= 
                            2560 cu. ft. (volume of space) 
If  additional  ventilation to adjoining room  is  supplied  with grills  or openings, add the 
volume of these rooms to  the  total volume of the space. 
    2.  Divide the space volume by 50 cubic feet to determine  the maximum BTU/Hr the 
space can support. 
       _________(volume of space)/50 cu. ft. =maximum BTU/Hr the space can support)             
        
       EXAMPLE:   2560 cu. ft. (volume of space /50 cu. Ft .= 51.2   or                   
                            51200 (maximum BTU/Hr the space can support) 
  
 3. Add the BTU/Hr of all fuel burning appliances in the space. 
       Vent-free heater                                               _______________BTU/Hr 
       Gas water heater*                                            _______________BTU/Hr  
       Gas furnace                                                      _______________BTU/Hr 
       Vented gas heater                                             _______________BTU/Hr 
       Gas fireplace logs                                             _______________BTU/Hr 
       Other gas appliances*                                   + _______________BTU/Hr 
       Total                                                              = _______________BTU/Hr 
Example: Gas water heater   40000 BTU/Hr 
                Vent-free heater + 18000 BTU/Hr 
                Total                  =  58000 BTU/Hr 
               *Does  not  include  direct-vent  gas  appliances.   Direct-vent  draws  combustion air 
from  the  outdoors and vents to the outdoors.  
   4.  Compare the maximum BTU/Hr the space can support with  the actual amount of BTU/
Hr used. 
       ____________BTU/Hr (maximum the space can support)     
       ____________BTU/Hr (actual amount of BTU/Hr used) 
Example:    51200  BTU/Hr (maximum the space can support) 
                   58000  BTU/Hr (actual amount of BTU/Hr used) 
The  space in the above example is a confined space  because  the actual BTU/Hr used is more 
than the maximum BTU/Hr the space can support. You must provide additional fresh 
air.   Your  options are as follows:    
   A.  Rework worksheet, adding the space of an adjoining room.  If the extra space provides 
an unconfined space, remove door to adjoining room or add ventilation grills between rooms.  
See “Ventilation Air From Inside Building”, page 33. 
   B.   Vent room directly to the outdoors.  See “Ventilation  Air From Outdoors”, page 34. 
   C.  Install a lower BTU/Hr heater, if lower BTU/Hr size  makes room unconfined. 
If  the  actual BTU/Hr used is less than the maximum  BTU/Hr  the space  can support, the 
space is an unconfined space.   You  will need no additional fresh air ventilation. 
 
WARNING:   
YOU MUST PROVIDE ADDITIONAL VENTILATION AIR  IN A 
CONFINED SPACE
 
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