Heat Pump vs Propane Calculator

Compare the same home under heat-pump-first and propane-only heating so you can screen design load, selected tonnage, seasonal kWh, propane backup gallons, and carbon impact without using price inputs.

Load first, equipment second The calculator starts with conditioned area, ceiling height, shell quality, air leakage, and winter design temperature before it sizes any equipment.

Hybrid lockout behavior Each heat pump profile keeps a separate low-temperature capacity curve, so propane share changes as you move the switchover point up or down.

Seasonal propane displacement You can compare propane-only gallons with hybrid gallons, then translate the difference into heat pump kWh and emissions reduction for the selected grid mix.

📌 Presets and Units

Imperial inputs active

Preset note: Mixed Ranch starts with a 42 by 42 foot footprint, average shell quality, mixed climate, and a 17 F switchover.

💡 Screening Logic

This tool uses an adjusted UA method for design load, climate-bin seasonal heating demand, profile-based heat pump capacity retention, propane AFUE, and grid emissions. It is designed for planning and comparison rather than permit-grade sizing.

Choose a preset or enter a custom home to compare propane-only heat against a hybrid heat pump strategy.

The active scenario will show selected tonnage, balance point, propane gallons avoided, and the portion of the seasonal load the heat pump can realistically carry.

🏠 Heated Geometry and Climate

Conditioned shape

Use heated floor area only, not garages, porches, or unconditioned basements.

Climate profile

Length (ft)

Width (ft)

Average ceiling height (ft)

Indoor setpoint (F)

Outdoor design temp (F)

Active geometry note

⚙ Envelope, Equipment, and Strategy

Envelope level

Window exposure

Air sealing

Distribution setup

Heat pump profile

Propane system

Hybrid control strategy

Grid emissions profile

Sizing and comfort buffer

This margin lifts design load and seasonal heating demand together.

Comparison summary

📊 Comparison Results

Selected Heat Pump Size

2.5 ton

8.8 kW nominal

Sizing is based on the selected lockout point, profile capacity retention, and design-side buffer.

Hybrid Propane Use

250 gal

seasonal propane backup

This is compared directly against the same home heated entirely with propane.

Heat Pump Seasonal Share

68%

12,400 kWh equivalent load share

The heat pump share depends on capacity at each winter bin and the chosen switchover temperature.

Carbon Reduction

1,420 kg

hybrid versus propane only

Cleaner grids and lower lockouts typically increase propane displacement.

Conditioned area1,764 sq ft

Conditioned volume14,994 cu ft

Adjusted UA312.0 BTU/h-F

Design load16.8 kBTU/h

Lockout temperature17 F

Balance point10 F

Design coverage93%

Seasonal heat58.4 MMBtu

Heat pump kWh6,820 kWh

Propane only gallons510 gal

Gallons avoided260 gal

Hybrid emissions2,480 kg CO2

🧮 Key Spec Snapshot

Heat Pump Profile Reference

Profile	COP 47 F	Cap 17 F	Min Temp	Best Use

Propane System Reference

System	AFUE	Design GPH	Seasonal Fit	Notes

Climate Comparison Table

Climate	Design Temp	HDD	HP Share	Gallons Avoided

Common Project Scenarios

Scenario	Area	Design Load	HP Size	Hybrid Gallons

🛠 Planning Tips

Use the real backup strategy

A lower propane lockout only helps if the selected heat pump can still hold useful capacity and COP in the colder bins. Matching the control plan to actual equipment matters more than chasing the lowest possible switchover.

Check duct location before upsizing

Attic or crawlspace ducts reduce delivered heat and can move the balance point upward. Tightening ducts often improves seasonal heat-pump share more effectively than jumping to the next tonnage step.

Warm pump is a system that uses refrigerants for warm and cool the insides of houses. For instance propane or R290 are one from those natural and environmental refrigerants. This green substance pushes the heating system even more friendly to the climate.

Its global warming potentiality is only 0.02 so it almost does not alter the climate. That helps to ensure that warm pumps will stay usable without restrictions in the coming years. Also it gives high easy temperatures and answers for many usages.

Heat Pumps and Propane for Efficient Home Heating

In addition the government subsidizes propane.

Warm pump operates basically by means of movement of heat from one place to another not by means of combustion. So it is naturally more efficient than sources that burn propane natural gas oil or electricity directly. They deliver much more of heat for the used energy.

Hybrid heating for homes manifests good alternative for energy. It depresses the expenses and leave little carbon footprint. Warm pump with propane reserve act as reversible air conditioner during good weather and later switch flat to propane when cool.

Like this one receives efficient heating during the whole year without the tolls of cold days in usual devices.

In many cases warm pumps work by means of electricity during gentle weather. But when come gross cold snaps the system passes to gaseous or propane furnace for helpful heat. When the exterior temperature falls the pump becomes less efficient although the house requires more heat.

Ultimately it no suffiĉas for the whole home. When the thermostat strips that the pump alone do not keep the internal heat it actuates both simultaneously. Some new thermostats seize the change early and switch the help immediately when the system no any more rules.

Propane heating for house operates similarly to natural gas with boiler. It answers for farms without gas line. The user preserves propane in tank at the farm.

Choosing the apt heater matter for depress costs and energy. Propane system does heat by means of combustion of propane during warm pumps move it between interior and outside. That gives flekseblon during the whole year.