This procurement will establish and maintain a Dynamic Purchasing System (DPS) for energy efficiency retrofit installation works predominantly to social housing and private domestic properties but may extend to other property types that are owned or managed by EN:Procure members/licensees. The lots are:

• Lot 1: Cavity wall insulation including that installed in party walls (B1)
• Lot 2: Draught proofing (B2)
• Lot 3: Energy efficient glazing and doors including replacement insulating glass units (IGU) (B3)
• Lot 4: External wall insulation (B4)
• Lot 5: Flat roof insulation (B5)
• Lot 6: Floor Insulation (B6)
• Lot 7: Hybrid wall insulation (B7)
• Lot 8: Internal wall insulation (B8)
• Lot 9: Loft insulation (B9)
• Lot 10: Pitched roof insulation (B10)
• Lot 11: Room-in-roof insulation (B12)
• Lot 12: Multiple Insulation Measures and/or Draughtproofing (2 or more B1,2,3,4,5,6,7,9,9,10 and/or 12)
• Lot 13: Condensing boilers, natural gas-fired and liquefied petroleum gas-fired and flue-gas heat recovery devices (C1 & C3)
• Lot 14: Heating, hot water system, air conditioning or ventilation controls and components (CHP etc) (C5)
• Lot 15: Mechanical Ventilation with Heat Recovery (C7)
• Lot 16: Warm-air heating systems (C9)
• Lot 17: Electric storage heaters (including electric warm air heating units that incorporate heat storage) (D1)
• Lot 18: Lighting fittings, lighting systems and lighting system controls (D2)
• Lot 19: Solar PV
• Lot 20: Solar Thermal
• Lot 21: Air Source Heat Pump
• Lot 22: Ground Source Heat Pump
• Lot 23: Smart Heating Controls/Monitoring
• Lot 24: Integrated Systems (Solar PV, battery storage and heat pump)
• Lot 25: Whole House Retrofit Solutions (combinations of any measures from above)

Each lot will be subdivided into A, B & C where each lot predominantly covers the following geographical areas within England:

• A is Yorkshire and Humber
• B is East Midlands and
• C is North West regions