Room Dimensions Enter lineal ft dimensions in appropriate shaded area and enter number of exposed (cold) walls of that length or width in appropriate shaded area. NOTE: walls adjoining heated area's have no heat loss through that wall Length of Room (ft) # of Exposed Walls Width of Room (ft) # of Exposed Walls Height of Room (ft) Wall & Ceiling Insulation Values Wall Insulation Level No Insulation R6 R8 R10 R12 R20 Ceiling Insulation Level If room is situated below a heated area there is no ceiling heat loss. Note: Fiberglass batt insulation has an R value of approx. 3 per inch. Not Applicable No Insulation R12 R20 R26 R32 R40 Door and Window Values Type of Doors Wood Wood c/w Storm Insulated Metal Sliding Glass Size of Doors (sq. ft) Door 1 Door 2 Door 3 Type of Windows Single Pane Double Pane Triple Pane Size of Windows (sq. ft) Window 1 Window 2 Window 3 Floor Type & Insulation Value Floor above heated space Concrete Slab (on grade) No Insulation R11 R28 Basement Slab (below grade) No Insulation R11 R28 Frame Floor No Insulation R12 R20 R32 R40 Infiltration Values & Calculation Infiltration losses include both losses through structure construction (e.g. cracks, leaks, etc.) as well as losses due to the normal air changes such as opening of outside doors etc. Note: Calculations are based on average residential values only, adjustments should be made for non-standard situations such as high traffic entrances etc. or for alternate building construction materials and methods. Values listed are for sheltered or partially sheltered to wind exposure. Use next lower value for exposed locations and second story rooms. Infiltration Category PoorLoose construction with no attempt to air sealing AveragePre-1970 style of construction c/w air/vapour barriers, no attempt to seal joints within vapour barriers GoodAs above but with specific attempts to tape and seal air/vapour barriers, floor and joist headers sealed. TightR-2000 style of construction Alternate Design Temperature Difference (D.T.D) The above calculated values are based on a design temperature difference of 72 degrees F (based on an outside temperature of 0 degrees F and a required inside temperature of 72 degrees F). There may be situations where this value should be adjusted accordingly. These include: Rooms that are currently partially heated Geographical locations that are either warmer or colder than a 75 degree temp difference Situations where an inside temperature of 72 degrees is not required Required D.T.D. = Degrees F
