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Welcome to the latest version of A2EP’s Heat Pump Estimator, launched in February 2025.

This tool is intended to help users gain an understanding on if a heat pump is suitable for their application, considering energy performance, emissions, and spatial considerations, in addition to gaining insight into what size (thermal capacity) should be considered. This information is aimed at informing initial conversations with solution providers.

Rarely do you need a heat pump with the same capacity as the boiler you’re replacing. Right-sizing your heat pump and thermal storage is a critical step for reliability and efficiency and can significantly reduce the capital and operating costs and therefore provide more attractive financial outcomes. This new version of the tool builds on the original launched in early-2023, and is more valuable and useful that ever with a range of new features:

Performance models have been updated to include part-load performance curves for various heat pump types
We have added R290, HFC, and HFO heat pump curves
Seasonal COP performance is now provided to assist in identifying performance of the heat pump at off-design conditions
Increased granularity in energy calculations, using an hourly simulation method
Hourly weather profiles and grid profiles (emissions and prices) by location are included for selected locations
Calculations for a gas baseline plant, by hour and by thermal load profile have been added
Eight new thermal load profiles have been added to the standard options for initial used
A simple function to modify standard load profiles by simply clicking to adjust the peak heating load or time of day has been added
A simplified user input format to enter ‘opening’ or ‘operational’ hours for a facility to provide more detailed time of day usage inputs to the performance model
Updated heat pump and thermal storage costs have been included with advanced pricing curve models from market data that can adjust as you enter more information (for example, temperature lift, or hot water outlet temperature)

About heat pumps

Heat pumps are increasingly viewed as an essential technology for the decarbonisation of heating and cooling in a range of applications.

Extremely efficient, heat pumps are also advantageous as they can run on renewably generated electricity, utilise waste heat and cool from adjoining processes and sources, and with the integration of thermal storage, heat pumps can enable optimisation of energy use and tariff structures and participation in demand response.

FutureHeat.info

Refrigerant classification

Refrigerants are classified according to their toxicity and flammability, in addition to their ozone depletion potential (ODP) and global warming potential (GWP).

It is important to understand the general classification of refrigerant when considering a heat pump installation as the installation scope may differ depending on which refrigerant and whether your site is an existing facility, or a newly proposed facility.

Further, it is important to understand the GWP of a refrigerant. GWP is a measurement that expresses the ability of a given refrigerant to trap heat in the atmosphere. The lower the GWP rating, the less impact the refrigerant has if leakage was to occur. Refrigerant leakage to the atmosphere is considered a direct emission (Scope 1), as if the leak occurs, it leaks directly to the atmosphere at point of use.

Privacy policy

We use best practices to protect your data online.

We will receive, and may collect and store, non-personal information that you enter through this website including information required by the Estimator. We may use software tools to measure and collect anonymised session information, including page response times, length of visits to certain pages, page interaction information, and methods used to browse away from the page.

Via website forms, we collect personal information such as the name, email address, title, organisation and contact details for site visitors who request to receive the results from the Heat Pump Estimator tool. We may store this information but will not share it.

Via website forms, we collect personal information such as name, email address, title, organisation and contact details for site visitors who subscribe for our e-newsletter updates, request contact from our organisation and/or sign up for events that we manage. We may store this information but will not share it.

We collect such Non-personal and Personal Information for the following purposes:

To provide and operate the Services;
To provide our Users with ongoing assistance and support;
To be able to contact our Visitors and Users with general or personalised service-related notices and promotional messages if they request us to do so;
To create aggregated statistical data and other aggregated and/or inferred Non-personal Information, which we may use to provide and improve our services;
To comply with any applicable laws and regulations.
We will only contact you via email, and only with your permission or at your express request. You are welcome to unsubscribe from e-newsletter updates at any time. Should you have any questions or concerns, please `contact us` at a2ep@a2ep.org.au or send us mail to: Australian Alliance for Energy Productivity, Level 10, UTS Building 10, 235 Jones Street, Ultimo NSW 2007.

Existing site

We first need to know a little more about your existing site.

Location

Your nearest location

Heating load profile

24-hour peak load profile

A representation of your load profile is shown below. Use the chart controls to modify load intensity and adjust for times of day.

Profile library

If the default load profile isn't representative of your operations, select the best fit from our complete library of load profiles.

Weather profile

Using seasonal weather profiles is recommended as it considers seasonal variations of temperature in your chosen location, weighting the temperatures seasonally rather than averaging the weighted yearly weather variations. The impact is the energy model will see wider temperature variations relevant to your chosen location, offering a more granular view of heat pump efficiency.

Hours of operation

Change operating hours

Capacity & temperature

Please provide additional details on capacity and temperature.

Average Heating Load or Water Flow

Average heat required (kW)

Tip: Try to avoid a like for like installation. Aim for a heat pump size which is at least 25% smaller than the existing boiler capacity.

Peak heating capacity (kW)

Enter the peak heating capacity required. In some instances this could be the installed capacity from the equipment nameplate(s), or in another cases a known peak heating capacity (ie: from BMS trends, or site knowledge). Typically, plants with more than one piece of equipment, the nameplate will not accurately reflect peak heating load expectation.

Max. hours of continuous peak heating

How many hours does the plant normally operate for when it experiences the peak capacity you entered.

Tip: Reducing peak loads with thermal storage reduces the heat pump size and allows for demand response operation.

Supply heating hot water temperature (ºC) or heat sink outlet temperature (ºC)

Tip: For every 10ºC reduction in the heating temperature, the heat pump will be 2-3% more

Return heating hot water temp (ºC) or heat sink return / inlet temp (ºC)

Tip: Heat pumps using CO₂ as the refrigerant ideally need the return temperature below 30ºC

Existing energy & fuel

Tell us more about the existing energy & fuel on site.

Heat pump selection

Heat pump requirements

Your heat pump estimate

Based on the information provided, here is your project report.
All monetary values are in Australian Dollars (A$) unless otherwise specified.

Heat pump results

Energy usage

Max demand

Heat pump size

Heating efficiency (COP)

Full load

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Seasonal

Financials (estimated)

CAPEX

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OPEX - Energy

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OPEX - maintenance

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Thermal size

Recommended size

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Thermal storage size

coming soon

Estimated CAPEX

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Business case

Net savings

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Simple payback

Heat pump & thermal storage

Carbon certificates & credit

Claiming white certificates?

Please note: The actual value of white certificates you can generate should be calculated by a qualified organisation... read full disclaimer

Are you using 100% Green Power or renewable energy?

Certificate type

Emissions savings

Certificate price

Annual certificate value

Certificate deeming period (years)

Deemed value

Simple payback (adjusted) years

Email project estimate

Edit project details

All information on this website is provided "as-is" per our Terms of Use.
We do not guarantee accuracy of data either displayed or relied on in generating estimations.

Web Software Engineering by Hashtag Technology.

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