Pool heat pump size and running cost

Check whether a quoted pool heat pump can meet an assessed heating load. The tool also estimates electricity costs from your daily heat demand and an assessed performance range. It does not work out a pool load from size alone.

Collect lower and higher heat-loss estimates, useful heat needed per day, available heating hours and the quoted output. Use the same pool water and outdoor conditions throughout. Output is heat supplied to the pool, not electricity drawn from the grid.

Enter operating days and months for the season you want to price. The months describe the operating season, while operating days describe how many days the entered heat demand applies. Check these with your installer rather than assuming every day is the same.

Required output = greater of assessed heat loss and daily useful heat ÷ daily heating hours. Purchased electricity = daily useful heat ÷ COP × operating days. Cost range uses the entered lower and higher COP.

COP (coefficient of performance) is useful heat delivered divided by electricity input. SCOP is this ratio over a season. A ratio of 4 means 4 kWh of heat per 1 kWh of electricity; use the ratio itself, without a percent conversion.

Energy prices are entered in pence or cents per kWh unless the field names another unit. Divide by 100 to obtain pounds or dollars. Fixed supply charges are excluded unless explicitly entered. Use tax-inclusive bill prices for personal scenarios.

Read the required output range beside the quoted output. The daily heat must fit into the available heating hours as well as cover the assessed heat loss. More hours can change that check, but the calculator does not decide a suitable operating schedule.

A higher COP means less electricity for the same useful heat, so it gives the lower cost. The two COP values describe assumptions you supply. They do not guarantee the limits of future bills.

These illustrative inputs are separate from your saved answers. Prices, use and performance are held constant for this worked scenario; they are not personal defaults.

Output must be quoted at your pool and outdoor design conditions. No unverified sizing margin or climate coefficient is added.

This is an entered scenario, not an automatic property or weather forecast. Use assessed seasonal performance for annual heat demand; a laboratory COP at one test point may not represent the season.

The estimate holds the selected price and daily heat demand constant over your operating days. Weather, cover use and water temperature can change actual demand. A positive output margin only describes the entered conditions; it does not confirm every part of an installation.

Do not enter electrical power in a useful-heat or heater-output field. Keep kW, which describes power at a time, separate from kWh, which describes energy over a period. Incomplete edits retain the last valid result with a warning.

This Australian estimate uses electricity prices in cents per kWh. Use the tax-inclusive price for the planned heating hours. A dated published network price may not match your own tariff, especially if prices change during the day.

Check the source period and use your bill price where appropriate. Fixed supply charges are excluded. The estimate does not remove an electricity account or price the purchase of a new heat pump.

Ask a qualified pool heating installer to assess heat loss, daily heat demand and output at the intended water and outdoor temperatures. Bring the exact model performance table and your planned season.

Ask them to review available heating hours, equipment compatibility and installation needs. The calculation does not replace that assessment or certify capacity and safety. Follow the maker instructions and the relevant local requirements before changing equipment.