Home Energy Audit
Audit your home energy use room by room. Get an efficiency grade, consumption breakdown, annual cost estimate, and a ranked list of improvements to cut your bills.
Scenario Comparison
| Scenario | Annual Cost | CO₂ (tonnes) | Energy Score |
|---|---|---|---|
| ★ Current State | $3,230 | 5.04 | 6.6 |
| Minimum Upgrades | $2,648 | 4.14 | 8.1 |
| Full Efficiency Upgrade | $1,873 | 2.93 | 10.0 |
Key Insights
- Your home scores 6.6/10 on energy efficiency. The US average is about 5.0. There is meaningful room for improvement.
- At $269/month and 5.0 tonnes CO₂/year, your biggest opportunity is: Switch to air source heat pump — saving $904/year.
How to Use the Home Energy Audit
- 1
Enter home details
Provide your home type, floor area, age, and number of occupants. These factors heavily influence baseline energy consumption.
- 2
Answer heating and insulation questions
Describe your heating system, thermostat settings, insulation levels, and window type. Heating accounts for around 60% of most home energy bills.
- 3
Add appliance and lighting data
Indicate the age and efficiency of major appliances, your lighting type, and hot water system to complete the consumption picture.
- 4
Review grade and action plan
See your energy efficiency grade (A-G), estimated annual energy cost, and a prioritised list of improvements ranked by bill-saving impact.
Key Features
Efficiency Grade A-G
Receive an EPC-style energy efficiency grade that lets you benchmark your home against UK housing stock standards.
Ranked Improvements
Get a prioritised action plan showing which upgrades - insulation, heating, lighting - will save the most money per pound spent.
Bill Savings Estimate
See a realistic estimate of how much you could save annually by implementing the recommended improvements.
Pro Tips
Loft insulation and cavity wall insulation typically offer the best return on investment - payback periods of 2-4 years are common at current energy prices.
Switching from a gas boiler to a heat pump saves both money and carbon emissions, but the upfront cost is significant. Check government grants available in your area.
Simply lowering your thermostat by 1°C typically reduces heating bills by around 10% with no capital cost.
Privacy Note
All calculations run entirely in your browser — no data is sent to any server. Your inputs are never logged, stored, or shared. This tool is completely free with no account or registration required.
Frequently Asked Questions
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