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Residential hot water calculators
How much energy your heat pump water heaters use, what they cost to run against the electric or gas system being replaced, what that adds up to over the life of the unit, and what they are worth after rebates. The figures come from the same AS/NZS 4234 modelling we run for your scheme submissions.
Find the right unit
Five questions about the home, then your details, then the unit in the range that suits it and why. This is the journey a customer takes on your site, and the lead your team receives at the end of it.
Question 1 of 6
How many people live there?
Do you expect the household to grow?
The range dashboard
Change the postcode, the household size and the system being replaced, switch between Australia and New Zealand, then change the layout and colours to see how differently the same tool can be presented.
Preview a different build
The same engine and the same numbers sit under every build; each is laid out and styled to the brand, so no two look alike.
Example postcode. Enter your own for local figures.
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About the demonstration. Every figure shown in the demonstration is illustrative: capacities, power inputs, COPs, sound levels, prices, energy use, running costs and certificate values alike. The products are invented and do not represent any system on the market. What is real is the method: the figures are derived through the same AS/NZS 4234 and scheme formulas a real job uses, from assumed performance data. Your build uses your own certified product data. For a commercial range read live from the VEU and ESS registers, see commercial hot water.
Product illustrations courtesy of EECA, Hot water heat pumps in the home. These are placeholders for the demonstration: your build uses your own product photography or renders, one per model, and we can work from whatever you already have for your brochures.
What the hot water engine works out
Household size and climate zone both change the answer, so the calculator uses the customer's own rather than a national average.
Annual energy consumption
The hot water load is scaled to the number of occupants and run through your product's own calibrated model, on the same basis the schemes accept.
Running cost against electric and gas
Your unit's annual running cost beside the cost of the system it replaces, at the customer's own electricity and gas rates, including controlled-load and time-of-use tariffs where they apply.
Lifetime cost comparison
Your unit against electric storage and gas over fifteen years, with the crossover point marked. Customers adjust their own energy rates and expected price rises.
Rebates across your whole range
Every model priced against the customer's own postcode. STCs nationally, VEECs in Victoria, ESCs in New South Wales, plus state rebates where they stack. Certificate counts come straight from your CER, VEU and ESS registrations.
Product specification comparison
Your range side by side: rated capacity and power input, refrigerant, delivery temperature, sound level, warranty and price. A customer can compare two models without opening two datasheets.
Recommendation questionnaire
Five questions about the home: occupants and whether the household will grow, climate, usage, installation space and budget. The visitor gets a product recommendation and the reasoning behind it. You get their name, email address and every answer.
New Zealand ranges
A New Zealand build runs the full energy and cost engine: annual consumption by household size and climate zone, running cost against the electric cylinder or gas system being replaced, lifetime cost with the crossover point marked, and the range comparison. It uses the New Zealand climate zones defined in AS/NZS 4234, the same standard the Australian schemes are built on.
There is no STC, VEEC or ESC equivalent in New Zealand, so a New Zealand calculator has no certificate panel. The running-cost and lifetime-cost comparison does the work instead, since most New Zealand replacements are still like-for-like cylinders. Switch the dashboard above to New Zealand to see it.
The engine behind the numbers
We do the AS/NZS 4234 modelling, the Australian scheme registrations and the New Zealand compliance work. The figures in your calculator come from the same engine that produced your test and submission documentation.
We can show how every one of them was derived if a customer, an installer or a regulator asks. A spreadsheet behind a web form cannot do that, and it is why a calculator built this way survives an audit or an RFI.
Want one for your range?
Tell us what your range looks like and what you want the tool to show. We will scope it and come back with a fixed quote.
Request a quote