Value windows doors inc.
													
																	U value of windows and doors. 
									
	
		
	
																	U factor u value range between 20 to 1 20. 
																	Our u value calculator is a whole window calculator designed to calculate an accurate u value of windows and doors. 
																	We can advise on how you might achieve the required standard. 
																	This might be a window but it might equally be a wall or a door. 
															
													
									
	
		
	
																	This calculated value conforms with bs en iso 10077 part 1. 
																	It s most often measured in watts per metres squared when the difference in temperature between the two sides is one degree kelvin. 
																	With a quality double glazed unit approximate u values are 1 2wm2k or alternatively a window energy rating wer of a. 
																	Thus a single paned window with a basic aluminum frame has a u value above 1 usually around 1 25 while triple pane windows may have u values around 25 or lower. 
															
													
									
	
		
	
																	For most energy efficient windows the whole window u factor is higher than the center of glass u factor. 
																	The u value or u factor measures how much heat a window including the frame glass and insulating materials allows out of the house which is also known as its thermal transmittance. 
																	U value is an inverse measure. 
																	The lower the u value the better the thermal performance of the product. 
															
													
									
	
		
	
																	A u value is a measure of heat energy moved through a given area of material in a given period of time. 
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																	A higher u factor allows heat to escape. 
																	A u value calculated by us should be sufficient to satisfy the requirements of building regulations. 
															
													
									
	
		
	
																	The liniar energyplus range contains 6 chambers and can achieve a u value as low as 0 8 w m2k with the correct glazing specification. 
																	High performance double pane windows can have u factors of 0 30 or lower while some triple pane windows can achieve u factors as low as 0 15. 
																	How is u value determined. 
																	The only exception to this rule are roof and skylight windows with low e smartsun glass which offer a u factor of 0 35. 
															
													
									
	
		
	
																	The lower the u factor the better the window is at keeping heat inside this is desirable in colder climates like the northeast. 
																	Low e smartsun windows and doors feature the best heat insulation of all andersen products with u factors ranging from 0 24 to 0 25. 
																	Is a leading supplier of high performance windows and doors that are elegant and energy efficient. 
																	What are u values and energy ratings for windows and doors.