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Generation Homes Standard

Target housing stock:

  • Typical UK house types, such as family semi-detached and terraced houses with characteristics around the average: 3 bedroom, 90 m2, 100 mm loft insulation, partial double glazing and a central heating system

Target carbon emission reductions (from an individual house):
  • Relative target of more than 60% carbon savings from an established baseline, or if not tangible
  • Absolute target of 2 tCO2 total house emissions or 0.5 tCO2 per occupant (if occupancy pattern deviates considerably from the average)

Means for achieving the GH standard:

Roof/loft
  • Insulation
 

 

300 mm mineral wool or ZODP equivalent
(Remark: minimum at joists; preferred at rafter level (when re-roofing)
  • Air-tightness
  5 m3/m2/h @ 50pa
  • Ventilation
   Minimum options: Passive stack and humidity sensors or Mechanical
Preferred option: Whole house mechanical ventilation with heat recovery and low fan power (1 W/l/s)
  • Roof solar systems
   Solar Hot Water and/or Solar PV
(Remark: depends on orientation and roof space; preferred full roof integration if re-roofing

Walls

  • Insulation
 

 

For semi detached and detached: 150 mm external or internal insulation
For terraced: 150 mm internal or external insulation at the back and dry lining and better windows at the front.

Windows

  • Performance
  

 

1.5 W/m2K at worst for the whole window; daylight transparency – 60%
  • Quality
  Durable, secure, sympathetic to context and from sustainable materials source
(Remark: secondary double glazing may be acceptable in difficult cases)

Floor

  • Insulation
  

 

Proper floor and perimeter insulation

Hot water and Heating

 

    
  • Specification
   Minimum option: Grade A boiler
Preferred options: innovative solutions such as biomass, micro CHP, Heat pumps ; Solar thermal store; electric (where demand is very low)
(Remark: not combi boiler if SHW also installed; Heat pumps if off-gas grid)
  • Controls
   Comprehensive and user friendly controls, e.g. CHESS
  • Sustainability
  Water conservation measures

Electricity demand

  • Appliances
 

 


Grade A / A+ / A++ only
  • Lighting
   Dedicated CFLs to fixed points

Energy consumption patterns:

  • Awareness
   User displays of electricity consumption
  • Behaviour
  Education and user manuals

The GH partners are aware of the wide range of issues pertaining to applying some of the measures listed above and are developing methods and solution that address these issues.