If CHRS supplied 10% of UK home gas heat
50% of Off-Grid Oil/LPG Homes
3.4 MtCO₂/yr avoided
≈ 1.9M cars (UK) | ≈ 0.75M homes
Combined Impact (Gas + Oil/LPG)
7.76 MtCO₂/yr avoided
≈ 4.4M cars (UK) | ≈ 4.85M homes (emissions-equiv.)
Supplying 10% of GB home heat (≈23.7 TWh/yr): CHRS vs ASHP vs GSHP
Common target so you can compare like-for-like: ~2.07 million homes’ heat per year.
| Option | Units to hit 23.7 TWh/yr | Electricity needed | Typical COP | Deployment realities |
|---|---|---|---|---|
| CHRS (800 m stacks feeding district loop) | ≈ 16,500 stacks (1.44 GWh/yr each) | ≈ 7.2 TWh/yr (23.7 ÷ 3.3) | ~3.3 (stable, shallow clay source) | Invisible; trenchless HDD; centralised plant; HIU in homes; land remains usable; modular ring mains with spurs to estates, villages, cottages. |
| ASHP (individual homes) | ≈ 2.07 million units (1 per home) | ≈ 9.5 TWh/yr (23.7 ÷ 2.5) | ~2.5 (drops in cold, defrost cycles) | Outdoor units on façades/gardens; noise; visible; grid peaks in cold snaps; millions of installs/servicing visits. |
| GSHP (individual homes) | ≈ 2.07 million systems (unless built as larger plants) | ≈ 6.2 TWh/yr (23.7 ÷ 3.8) | ~3.5–4.0 (good, but site-dependent) | Deep boreholes or large trench fields per plot; high capex per home; land take; slower to retrofit at scale. |
Assumptions: Mean home heat ≈ 11,451 kWh/yr; CHRS 800 m stack ≈ 1.44 GWh/yr delivered (@COP≈3.3); illustrative seasonal COPs: ASHP≈2.5, GSHP≈3.8. Electricity figures are annual energy, not instantaneous peak power. CHRS figure represents central plant draw, typically flatter across seasons.
CHRS gives District-Scale Decarbonisation with spurs to villages and cottages – Urban and Rural in one Living Network
CHRS — 10% of GB Home Gas Heat
Utility Solar PV — 10% of UK Electricity
Wind — 10% of UK Electricity
CHRS Energy – The 4th Renewable: It de-carbonises heat (where most UK emissions are), with no visible land taken.
CHRS hits the heat sector (the UK’s biggest and hardest-to-abate demand).