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HEM · Energy Performance Assessment
Home Energy Model Report
23 Beech Avenue, Salford · M21 8QT
Assessment Summary Dashboard
HEM headline metrics & fabric compliance overview
EPC Band
F
EPC Headline Metrics
Fabric Compliance
Elements compliant0
Above U-value target7
Total elements7
Primary heatingOil boiler
Fuel typeOil
⚠ Fossil fuel systems are capped at Band C under HEM:EPC
System Efficiency Comparison
Current vs Potential Performance
Side-by-side comparison after recommended upgrades
Current
F
SAP 26
+54
Potential
C
SAP 80
Fabric Performance
Building envelope energy efficiency (walls, roof, windows, floors)
F
22
B
88
+66
Heating System
Heating system efficiency and emissions. Fossil fuels capped at Band C.
D
55
B
90
+35
Smart Readiness
On-site generation, storage, and smart control capability
G
10
B
83
+73
Energy Cost
Annual energy running cost per m²
G
15
D
57
+42
Current annual cost
£0
Potential annual cost
£0
Save £0/yr
Recommended Upgrades (5)
Replace fossil boiler with air source heat pump
COP 3.0 vs current 90% efficiency
Heating band improvement + fossil fuel cap removed
Upgrade 7 fabric elements to target U-values
External walls (0.75 → 0.30), Party walls (0.50 → 0.20), Roof (0.40 → 0.16), Ground floor (0.45 → 0.18), Exposed floor (0.45 → 0.18), Windows (3.50 → 1.40), External doors (3.50 → 1.40)
Fabric performance band improvement
Install roof-mounted solar PV (4 kWp)
South-facing array with 4 kWp capacity
Smart readiness + energy cost reduction
Add battery storage (10 kWh)
Enables self-consumption of PV generation
Smart readiness band improvement
Install zoned smart heating controls
Per-zone thermostatic control with smart scheduling
Smart readiness + cost reduction
Score Impact Breakdown
Where improvement investment will have the greatest effect on your EPC rating
Headline Metrics — Ranked by Improvement Potential
Top
Smart Readiness
Band G · 10/100
10
+90 to Band A
90 pts
Energy Cost
Band G · 15/100
15
+85 to Band A
85 pts
Fabric Performance
Band F · 22/100
22
+78 to Band A
78 pts
Heating System
Band D · 55/100
55
+45 to Band A
45 pts
Fabric Element Scores — Pinpoint Insulation Gaps
External walls
0.75 W/m²K
+72
Party walls
0.50 W/m²K
+72
Roof
0.40 W/m²K
+72
Ground floor
0.45 W/m²K
+72
Exposed floor
0.45 W/m²K
+72
Windows
3.50 W/m²K
+72
External doors
3.50 W/m²K
+72
Score = how close each element's U-value is to its Building Regulations target. Red = furthest from target, greatest improvement potential.
Energy System Contributions
Space heating systemOil boiler
Fossil fuel — capped at Band C
Solar PV generationNone installed
Adding PV would boost smart score0/35 pts
Battery storageNone installed
Pair with PV for maximum benefit0/30 pts
Smart controlsNone
Upgrade to zoned smart controls for full marks0/25 pts
Highest Impact Opportunities
1
Smart Readiness — 90 points below Band A
On-site generation, storage, and smart control capability
2
Energy Cost — 85 points below Band A
Annual energy running cost per m²
3
Fabric Performance — 78 points below Band A
Building envelope energy efficiency (walls, roof, windows, floors)
4
Heating System — 45 points below Band A
Heating system efficiency and emissions. Fossil fuels capped at Band C.
EPC Headline Metrics
Four-band rating replacing the single A–G EPC under the HEM:EPC framework (coming 2027)
Fabric Performance
F
22/100
Building envelope energy efficiency (walls, roof, windows, floors)
Heating System
D
55/100
Heating system efficiency and emissions. Fossil fuels capped at Band C.
Smart Readiness
G
10/100
On-site generation, storage, and smart control capability
Energy Cost
G
15/100
Annual energy running cost per m²
HEM Score
32
EPC Band
F
CO₂ Emissions
8.2 t/yr
Annual Fuel Cost
—
Dwelling Fabric — Thermal Elements
U-values (W/m²K) per element. Lower U-value = better insulation.
| Element | U-value | Target | Area (m²) | Compliance |
|---|---|---|---|---|
| External walls | 0.75 | 0.30 | — | Above target |
| Party walls | 0.50 | 0.20 | — | Above target |
| Roof | 0.40 | 0.16 | — | Above target |
| Ground floor | 0.45 | 0.18 | — | Above target |
| Exposed floor | 0.45 | 0.18 | — | Above target |
| Windows | 3.50 | 1.40 | — | Above target |
| External doors | 3.50 | 1.40 | — | Above target |
Energy Systems
Heating, hot water, ventilation, generation, and controls
Space heating
Oil boiler
Fuel: Mains gasEfficiency: 90%
Hot water system
Hot water cylinder
Fuel: Mains gasEfficiency: 80%Volume: 150L
Ventilation
Natural (background vents)
Airtightness: 5 m³/h/m²
Cooling
None
Solar PV
None
Orientation: South
Battery storage
none
Efficiency: 95%
Smart controls
None