To bring it up to 2008 code you might need >5k.
所有跟帖:
                    •                    
                    的确是要多于这个数目的。谢谢您回复。
                     -3apples- 
                    ♀                    
                        
                    
                                                            
                    
                    
                                        
                        (0 bytes)
                        ()
                        12/10/2012 postreply
                                                12:01:25
                    
                    
                    •                    
                    如果只有5-6千的话,那就好了。我不知道是不是要这个一倍多。
                     -3apples- 
                    ♀                    
                        
                    
                                                            
                    
                    
                                        
                        (0 bytes)
                        ()
                        12/10/2012 postreply
                                                12:02:46
                    
                    
                    •                    
                    how large is the house?
                     -borisg- 
                    ♀                    
                        
                    
                                                            
                        
                    
                                        
                    
                    
                                        
                        (0 bytes)
                        ()
                        12/10/2012 postreply
                                                12:14:06
                    
                    
                    •                    
                    about 1500 sq feet
                     -3apples- 
                    ♀                    
                        
                    
                                                            
                    
                    
                                        
                        (62 bytes)
                        ()
                        12/10/2012 postreply
                                                12:18:33
                    
                    
                    •                    
                    回复:about 1500 sq feet
                     -borisg- 
                    ♀                    
                        
                    
                                                            
                        
                    
                                        
                    
                    
                                        
                        (383 bytes)
                        ()
                        12/10/2012 postreply
                                                12:29:41
                    
                    
                    •                    
                    It may need some drywall work, also the panel may need upgrading
                     -易木- 
                    ♂                    
                        
                    
                                                            
                        
                    
                                        
                    
                    
                                        
                        (0 bytes)
                        ()
                        12/10/2012 postreply
                                                12:39:31