# Heat pump savings and sizing estimator

Compare electric resistance heating with a heat pump using your own heating demand, tariff and seasonal performance estimate. Compare a proposed output with a documented design load. This does not size equipment from floor area.

Use the tool on the [web page](https://heatpumppros.fyi/tools/heat-pump-savings-sizing-estimator). It works without JavaScript.

## How to use it

1. Enter annual delivered heating demand.
2. Enter marginal electricity rate.
3. Enter expected seasonal cop.
4. Enter calculated design heating load.
5. Enter proposed output at that condition.
6. Read the result.

## How it works

This is an energy-balance calculation. Seasonal COP means delivered heat divided by electricity input. Estimated electricity is heating demand divided by the entered COP. Cost is electricity multiplied by the entered marginal tariff. Savings are the difference. No typical rates, home sizes or efficiencies are supplied.

Baseline: electric resistance heating only. Use measured heating consumption or a designer estimate that separates heating from other loads. Fixed utility charges, capital cost, maintenance, cooling, hot water, weather changes and incentives are excluded. The same electricity rate is used for both systems. This is not a gas or oil bill converter.

Government of Canada, Heat pump basics, fetched 2026-11-10: https://www.canada.ca/en/environment-climate-change/services/energy-efficiency/heat-pumps/heat-pump-basics.html. The source explains heat transfer and says performance varies with location and the system replaced. Its general efficiency comparisons are not assumed for your home.

ACCA, Manual J, fetched 2026-11-10: https://www.acca.org/standards/technical-manuals/manual-j. Use a documented residential load calculation. The capacity comparison subtracts that load from the entered output at the same design condition. It is not an equipment selection.

NEEP, ccASHP specification and product list, fetched 2026-11-10: https://neep.org/heating-electrification/ccashp-specification-product-list. Use matched-system cold-weather data, not a nominal size. The form limits are software validation bounds, not expected household values.

> Planning estimate only. Use your own documented inputs. A positive capacity gap is not design approval. Ask a qualified contractor to calculate loads and select equipment.

## Questions

### Can this select a heat pump size?

No. It compares a design load and a proposed output you already have. A qualified designer must check cooling, modulation, distribution and backup heat.

### Why are the fields blank?

Your tariff, home load and seasonal performance must come from your records and design. We do not guess them.