Heat Loss Coefficient F2 Of Slab Floor Construction

H t heat flow btu hr w j s.

Heat loss coefficient f2 of slab floor construction.

The heat transmission through a building wall or similar construction can be expressed as. A wall area ft 2 m 2. It applies to building elements below a horizontal plane in the bounding walls of the building situated at the level of inside floor surface. U overall heat transfer coefficient u value btu hr ft 2 o f w m 2 k.

The overall heat transfer coefficient the u value describes how well a building element conducts. Is the heat loss coefficient for the particular construction in btu hr ft f 2 p is the perimeter of slab in ft 3 t i is the inside temperature in f 4 t o is the outside temperature in f heat loss from slab on grade foundations is a function of the slab perimeter rather than the floor area. I ve been dancing around this issue searching yakking etc and i still don t know how exactly to calculate heat loss out of a slab on grade. It may be way too simplistic thinking to break that out of a complex software program and if so then so be it.

Floor area 60 40 20 0 utput. Heated slabs on grade will feature hot water pipes or coils embedded within or beneath the slab to provide space heating. A slab or suspended slab will put out more heat than joisted floors. H t u a dt 1.

Heat losses from heated slabs are greater than that of unheated slabs because the temperature is warmer. Heating output in 65 degree room per sq. Building energy code and standards like ashrae 90 1 90 2 and california title 24 require the underground wall constructions and slabs on grade or underground floors not to exceed certain maximum values of c factor and f factor which do not specify detailed layer by layer materials for the constructions. Look at another radiant heating method that puts out more heat than what you were thinking about first.

En iso 13370 1998 which gives methods of calculation of heat transfer coefficients and heat flow rates for building elements in thermal contact with the ground including slab on ground floors. Lower the heat loss with energy efficiency measures this is the best solution. A slab on grade floor that is not a heated slab on grade floor. Ground heat transfer calculations using c and f factor constructions.