Real Results
Client Case Studies
Real homes, real savings. Explore how Irish families have transformed their energy use — and see the numbers that prove it.
€14k+
Total Annual Savings
across featured clients
€45k+
SEAI Grants Secured
for these projects
25.7t
CO₂ Saved Per Year
tonnes of carbon avoided
7
Avg. BER Bands Gained
per retrofit project
Featured Project
Keith & Mary O'Brien
Meath · New Build — 4-bed detached
D1
Before
A2
After
BER Improvement
D1 → A2
€2,400
Saved / yr
4.2t
CO₂ / yr
€9,200
SEAI Grant
Air Source Heat PumpSolar PV 6kWpBattery Storage 10kWh
"From initial quote to commissioning, the entire process was seamless. Our energy bills have dropped dramatically and the house is warmer than ever. We couldn't recommend C2 Energy highly enough."
More Client Stories
Wendy & Paul Carroll
Dublin · Semi-detached — 3-bed, 1980s build
E1
Before
C2
After
€1,650
Saved/yr
2.8t
CO₂/yr
€3.4k
SEAI Grant
Solar PV 4kWpBattery Storage 5kWhSmart Heating Controls
"Excellent service — no problem was too much trouble. Fast, reliable and highly recommended. The solar panels have been f…"
Gerard & Siobhán Farrell
Newtownabbey, Belfast · Detached bungalow — 1970s
F
Before
B2
After
€2,950
Saved/yr
6.1t
CO₂/yr
€10.5k
SEAI Grant
Ground Source Heat PumpAttic & Wall InsulationA-Rated Windows
"C2 Energy installed a heat pump system and I could not recommend them highly enough. Expert advice from start to finish …"
Emma & David Walsh
Cork City · Terraced house — 1960s
E2
Before
B3
After
€1,800
Saved/yr
3.5t
CO₂/yr
€8.4k
SEAI Grant
Air Source Heat PumpSolar ThermalHeating Controls
"Very professional and takes time to explain how the renewable energy systems work. The quality of the work is to a very …"
Unal & Bríd Kaya
Galway · Detached — 200m², 2000s build
D2
Before
B1
After
€2,100
Saved/yr
3.9t
CO₂/yr
€3.7k
SEAI Grant
Solar PV 6kWpBattery Storage 15kWhEV Charger
"We love the system — our electricity bills are almost nothing in summer. When we had a question, C2 Energy helped troubl…"
Ronan McGuinness
Limerick · Bungalow — 200m², 1990s
E1
Before
B2
After
€2,600
Saved/yr
5.2t
CO₂/yr
€9.8k
SEAI Grant
Air Source Heat PumpSolar PV 4kWpWall Insulation
"I had a full renewable energy retrofit — heat pump and solar panels. The after-care service from C2 Energy is second to …"