3 Bed Semi-Detached House (91.5m²)
Base Design Specification & Suggested Improvements
The following table shows suggested improvements suitable for a typical 3 Bed Semi-Detached House constructed in the mid 1990’s:
| Base Design | Suggested Improvement | |
| Glazing U-Value (W/m²K) | 4.8 | 1.7 |
| Percentage Low Energy Lighting Installed (%) | 0 | 100 |
| Loft Insulation (mm) (U-Value) | 100mm Mineral Fibre (0.35W/m²K) | 250mm Mineral Fibre ((0.16W/m²K) |
| Secondary Heating System (Efficiency) | Open Fire (30%) | Wood Pellet Stove (65%) |
| Main Heating System (Efficiency) | Gas Boiler (65%) | High Efficiency Condensing Boiler (90%) |
| Main Heating System (Efficiency) | Gas Boiler (65%) | Geo-Thermal Heat Pump (350%) |
| Main Heating System (Efficiency) | Gas Boiler (65%) | Wood Chip Boiler (85%) |
| Main Water Heating System | Gas Boiler & Electric Immersion | Addition of 3m² of Solar Thermal Panels |
Results
The results when the above suggested improvements are carried out are as follows:
| BER | Primary Energy (kWh/m²/yr) | CO2 Emissions (kgCO2/m²/yr) | |
| Base Design | E1 | 322.32 | 68.5 |
| Improved Glazing (1.7 W/m²k) | D2 | 287 | 61.03 |
| Loft Insulation | E1 | 313.78 | 66.73 |
| Low Energy Lighting | C3 | 314.87 | 66.65 |
| High Efficiency Condensing Boiler (90%) | D2 | 261.65 | 57.42 |
| Wood Pellet Stove | D2 | 297.63 | 55.36 |
| Accumulation of the above improvements | C2 | 198.9 | 37.12 |
| Inclusion of Solar Thermal (3m²) | D2 | 289.91 | 61.7 |
| Inclusion of Photovoltaic Solar Panels | D2 | 295.91 | 62.26 |
| Wood Pellet Boiler | D2 | 274.03 | 32.29 |
| Heat Pump | C3 | 222.79 | 56.66 |
| 2006 TGD Part L Compliant | C1 | 161.36 | 34.4 |
| Assessment based on changes to TGD Part L Regulations in 2008 | B1 | 96.81 | 23.73 |