Residential Case Study
College View Wexford – Deep Retrofit
12 houses in Wexford town are first to benefit from the ‘Deep Retrofit’ grant programme
Project owner: Wexford County Council
Support and project management:3 Counties Energy Agency
Project overview: 12 homes (3 x 4 unit terraces)
BER rating before: F/G BER ratings
Energy Value: 595 / 753 (end-of-terrace) kwh/m2/yr
Year of Construction: 1967-1977
Type: Cavity wall
Main heating system: Oil boilers
Project Overview
Wexford County Council, with project management assistance from 3cea retrofitted 12 x 1-bedroom bungalows, consisting social housing tenants on College View, Wexford town. These 12 Properties were first to benefit from the 50% grant aid through the SEAI’s Deep Retrofit Pilot scheme. All homes were constructed in the early 70’s and had a pre-building BER ratings of F’s or G’s. All homes also had issues with inadequate ventilation and thermal bridging, resulting in mould growth on damp stains on the ceiling and internal wall surfaces. Following the renovations, all homes were retrofitted to A1, A2 and A3 BER rating. Apart from the energy savings, Deep Retrofit is also expected to have significant health benefits to homeowners as they will enjoy thermal comfort, cleaner, better circulated air and improved living conditions.
Measures included
- External Insulation – Improving U-Value from 1.8 W/m2K to 0.20 W/m2K
- Attic Insulation – Improving U-Value from 0.16 W/m2K to 0.12 W/m2K
- Heat Pump – Daikin 4kW Air to Water Heat Pump – Space Heat Efficiency uplift by 530%
- Water Heat Efficiency – uplift by 213%
- PV Solar System – 6 No. 285 West facing Panels
- Demand Controlled Ventilation – Humidity & Standard controls
- Window & Door Upgrade – Improving U-Value from 3.1 W/m2K to 0.85 W/m2K
Results
Increased BER
Increased BER rating on 10 Properties to A2 Rating – on 1 Property to A3 Rating – 1 Property to A1 Rating
Cost Per Unit – €25,000.00 – Cost Per Unit After Grant – €12,500.00
50% Funding
50% Grant Funding Through SEAI Deep Retrofit Pilot Programme.
Project Costs – Overall costs – €300,000.00 – SEAI Grant Funding at 50% – €150,000.00
Increased comfort
Reduced Costs
Reduced Maintenance costs
Better Air Quality and health benefits
Increased comfort
Increased value
