Example 1
- Q 14000
- AFUE 0.92
- 0.18 kg/kWh
- COP 2.8
- grid 350
- pump 70%
823.0 kg CO₂e · per year
How much from heat pump vs gas at 14000 and 70%? 823.0 kg CO₂e · per year. Q, not a price list.
Heat pump vs gas
Type Q, AFUE, gas kg, COP, grid and pump share. 14000, 0.92, 0.18, 2.8, 350 and 70 give 823.0 kg CO₂e · per year. 12000 and 50% give 1,334.1. 18000 and 100% pump give 2.2. Typed factors, not a tariff.
Q and a share. 14000 kWh and 70% pump give 823.0 kg CO₂e · per year. Not a price list. Empty optional fields stay empty.
Results
Enter data and click Calculate.
How it works
Heat pump vs gas in this calculator is annual CO₂e from Q and the pump share. 14000 kWh, AFUE 0.92, 0.18 kg/kWh, COP 2.8, grid 350 and 70% pump give 823.0 kg CO₂e · per year. 12000, 0.9, 0.2, 3, 400 and 50 give 1,334.1 kg CO₂e · per year. 18000, 0.85, 0.18, 2.5, 300 and 100 give 2.2 kg CO₂e · per year.
Gas = Q × (1 − share%/100) / AFUE × kg/kWh. Pump = (Q × share%/100) / COP × grid/1e6. At 100% pump the result is 2.2 kg, because the grid goes through 1e6. That is not meter kWh at g/1000.
823.0 kg CO₂e · per year is not a loan. 1,334.1 is less pump. 2.2 is COP and grid alone. Optional fields stay empty.
Insulation CO₂ next door counts U. Household CO₂ counts gas in m³. Here Q stays: 14000 and 70% stay 823.0 kg CO₂e · per year.
Type 14000, 0.92, 0.18, 2.8, 350 and 70, then Calculate. A comma in 0.92 parses. A Q sketch, not an installer.
14000 and 70% give 823.0 kg CO₂e · per year. 12000 and 50% give 1,334.1 kg CO₂e · per year. 18000 and 100% give 2.2 kg CO₂e · per year. Another share at 14000 changes 823.0.
Formula
gas = Q × (1 − f/100) / AFUE × gas_kg. pump = (Q × f/100) / COP × grid/1e6. total = gas + pump. Suffix · per year.
How to use
- Type Q 14000, AFUE 0.92 and 0.18 kg/kWh gas.
- Add COP 2.8, grid 350 and pump share 70%.
- Click Calculate. The result is 823.0 kg CO₂e · per year.
- 12000 and 50% give 1,334.1. 18000 and 100% give 2.2 kg CO₂e · per year.
- The grid slice uses 1e6. Not a boiler price list.
14000 / 70% pump = 823.0 kg CO₂e · per year
Q and a share. 14000 kWh and 70% pump give 823.0 kg CO₂e · per year. Not a price list.
- Heat
- Q in kWh. 14000 at 70% stays inside 823.0 kg CO₂e · per year. 12000 at 50% gives 1,334.1.
- pump
- The Q share. 70 at 14000 leaves 823.0 kg CO₂e · per year. 100 at 18000 gives 2.2.
- gas
- The rest / AFUE × 0.18. At 70% it stays inside 823.0 kg CO₂e · per year. At 100% it drops to zero.
Examples
Example 2
- Q 12000
- AFUE 0.9
- 0.2 kg/kWh
- COP 3
- grid 400
- pump 50%
1,334.1 kg CO₂e · per year
How much at 12000 and 50%? 1,334.1 kg CO₂e · per year.
Example 3
- Q 18000
- AFUE 0.85
- 0.18 kg/kWh
- COP 2.5
- grid 300
- pump 100%
2.2 kg CO₂e · per year
How much at 18000 and 100% pump? 2.2 kg CO₂e · per year. Grid/1e6.
Related calculators
Common questions
How much at 14000 kWh and 70% pump?
823.0 kg CO₂e · per year. Gas from AFUE plus a grid fraction.
How much at 12000 and 50%?
1,334.1 kg CO₂e · per year. More furnace gas.
How much at 18000 and 100% pump?
2.2 kg CO₂e · per year. Grid/1e6, not 2160 kg.
Is 823.0 a pump payment?
No. CO₂e from Q. A grant and a quote sit outside this calculator.
Why is 100% pump 2.2 kg?
Pump kWh × 300 / 1e6. The engine does not divide by 1000.
Does a comma in 0.92 work?
Yes. 0,92 and 0.92 are the same AFUE.
How is this different from insulation?
That card uses area and two U values. Here Q, AFUE and COP.
Do blank persons split 823.0?
No. Options stay empty. The result is the year sum.
Is this an installer quote?
No. A Q sketch. A product SCOP does not enter until you type it.
Knowledge sources
The factors on the page are a sketch. Below are EPA emissions terms, not a national inventory.
Page updated in 2026.