Achieving CSH Level 3 - Exemplar 4a - Mid Floor Flat MECHANICAL VENTILATION WITH HEAT RECOVERY APPROACH
BUILT FORM
Mid floor flat
Floor area 59.27m2
Sheltered sides = 2
THERMAL ENVELOPE
'U' values for external elements
Floor N/A
Walls 'U'=0.15 W/m2K
Roofs N/A
Windows 'U'=1.3 W/m2K
Doors 'U'= 0.9 W/m2K
VENTILATION
Design air permeability = 3.0 m3/hour/m2 at 50 Pa
Mechanical ventilation system with heat recovery (system SAP Appendix Q registered)
Kitchen + 1 additional wet room
Rigid, insulated ductwork
Specific fan power = 1.0 w/l/s
Heat exchange efficiency = 85%
HEATING AND HOT WATER
Gas fired condensing combi boiler - 90.2% efficient, SEDBUK band A
No secondary heating to lounge
LIGHTING
6 no. fixed dedicated low energy light fittings
CONSTRUCTION DETAILS
Accredited construction details used
SPECIAL FEATURES
Flue gas heat recovery system applied to boiler.