Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
HVAC & Climate Control
Heat Pump vs Furnace Savings Calculator
Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
Compare annual heating cost between a furnace and a heat pump. Planning estimates only — verify measurements and local codes on site.
Inputs
503000
6098
25
0.050.5
0.55
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Annual savings vs furnace = $284.53. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
Compare A vs B
Capture two sets of inputs on this device, then see which outcome wins. Share either scenario with a link.
Scenario A
Adjust inputs, then capture this slot.
Scenario B
Adjust inputs, then capture this slot.
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Annual heating therms
The “Annual heating therms” value used in this tool’s formula. Adjust it to see results update live.
Furnace AFUE (%)
The “Furnace AFUE (%)” value used in this tool’s formula. Adjust it to see results update live.
Heat pump COP
The “Heat pump COP” value used in this tool’s formula. Adjust it to see results update live.
Electric rate ($/kWh)
The “Electric rate ($/kWh)” value used in this tool’s formula. Adjust it to see results update live.
Gas rate ($/therm)
The “Gas rate ($/therm)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Compare annual heating cost between a furnace and a heat pump. Planning estimates only — verify measurements and local codes on site. Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412). Example: 600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
Example: 600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
When to use this Heat Pump COP Savings
Common use cases
- Compare annual heating cost between a furnace and a heat pump.
- Sanity-check with this case: 600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
- The relationship is: Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
Localized examples
- HVAC & Climate Control: the example on this page uses the same formula as the widget.
What you get
- Fields: Annual heating therms, Furnace AFUE (%), Heat pump COP, Electric rate ($/kWh)
- Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
- Example on the page: 600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
How to Calculate Heat Pump COP Savings Step-by-Step
- 1Enter Annual heating therms, Furnace AFUE (%), Heat pump COP, then the remaining fields. Use the values you have, not a catalog average, unless that is all you know.
- 2Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
- 3Worked case: 600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
- 4Buy materials after you walk the job. This is a first-pass quantity, not a purchase order.
Governing formula
Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
600 therms at AFUE 80% vs COP 3.2 heat pump at $0.14/kWh → meaningful winter savings.
Example: set Annual heating therms = 600, Furnace AFUE (%) = 80, Heat pump COP = 3.2, then read the result.
Variable definitions
- annualTherms
Annual heating therms
The “Annual heating therms” field. Default 600; typical range 50–3000.
- furnaceAfue
Furnace AFUE (%)
The “Furnace AFUE (%)” field. Default 80; typical range 60–98.
- heatPumpCop
Heat pump COP
The “Heat pump COP” field. Default 3.2; typical range 2–5.
- electricRate
Electric rate ($/kWh)
The “Electric rate ($/kWh)” field. Default 0.14; typical range 0.05–0.5.
- gasRate
Gas rate ($/therm)
The “Gas rate ($/therm)” field. Default 1.5; typical range 0.5–5.
- The takeoff (Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).) ignores waste, code, and what you find when you open the wall. Measure twice on site.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Furnace kWh equiv = therms × 29.3; heat pump kWh = heat BTU ÷ (COP × 3,412).
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Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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