Services
Custom calculators for your website
Interactive tools that answer what a customer wants to know before they buy: what size they need, what it costs to run, what it saves against the system they have now, and what it is worth after rebates. Built around your product range, styled to your brand, and running on the same simulation engines we use for compliance work.
What we build for
The delivery, theming, lead capture and live data layers are the same whatever the equipment is. What changes is the calculation underneath. Six verticals have a working example you can try. The rest are scoped against your range before we quote.
Residential hot water
Energy use, running cost against the electric or gas system being replaced, lifetime cost, and STC, VEEC and ESC value across your range. Runs the AS/NZS 4234 modelling behind your scheme submissions.
See the example →Commercial hot water
VEEC and ESC value across every model you have registered under the VEU and ESS, read live from the registers, plus sizing and running cost for a commercial site.
See the example →PV water heaters
How much of a household’s hot water a rooftop array actually pays for, what the rest costs against electric or gas, and how much solar spills past the tank. PV direct to the element, not solar thermal. Runs a full AS/NZS 4234 annual simulation of the tank, per answer.
See the example →Swimming pools and spas
Heat pump sizing on a real heat balance rather than a rule of thumb, season length, heat-up time, cover comparison and running cost. Runs the AS 5352:2022 method on the pool’s own climate.
See the example →Air conditioning and space heating
Eligibility and certificate value for any brand and model on the GEMS Registry, under VEU Part 6 in Victoria and ESS Activity D16 in New South Wales, with every lookup table behind the answer shown. Capacity sizing and running cost are scoped against your range.
See the example →Solar home batteries
Payback, sizing and self-consumption from a 30-minute-resolution simulation of the household’s own year, against its real array, tariff windows, load shape, export limit and feed-in rates. Prices the federal and state incentive stack by postcode.
See the example →Hydronic and underfloor heating
Room-by-room heat loss, circuit and emitter sizing, and running cost. Scoped against your range.
Scoped to your range →Commercial and industrial refrigeration
Cold room and refrigerated cabinet load, running cost, and certificate value under the VEU and ESS activities that cover the equipment. Scoped against your range.
Scoped to your range →Something else
If your product has a running cost, a sizing decision or an incentive attached, there is a calculator in it. Tell us what the tool should work out and we will scope the engine behind it.
Scoped to your range →What a calculator can show
Most brands start with one or two of these and add more later. Everything below runs off the same shell, so combining them costs less than building them separately.
Annual energy consumption
How much energy the equipment uses in the customer's own climate at their own usage, rather than at a nameplate rating. The figures come from a simulation of the product, and they are the same ones behind a compliance submission where the vertical has one.
Running cost against what it replaces
Your product's annual running cost beside the cost of the system being replaced, at the customer's own electricity and gas rates. The same calculation works in Australia and New Zealand.
Lifetime cost and payback
Your product against the incumbent over the life of the unit, with the crossover point marked. Customers adjust their own energy rates and expected price rises.
Sizing and product selection
The customer enters the building, the pool or the load, and the tool returns the duty it needs and the model in your range that meets it. Sizing runs the published method for that vertical, so the answer holds up when an installer checks it.
Incentive and certificate value
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 scheme registrations.
Product specification comparison
Your range side by side: capacity, power input, refrigerant, delivery temperature, sound level, warranty and price. A customer can compare two models without opening two datasheets.
Recommendation questionnaire
A short set of questions about the site, then a product recommendation and the reasoning behind it. The visitor gets a specific model. You get their email address and every answer they gave.
Your own comparison
Describe the comparison you want and we will build it, with the working available if anyone asks: solar diversion, controlled-load and time-of-use tariffs, annual emissions, payback against a named competitor. We own the engines, so there is no fixed feature list.
Try one
This example happens to be a hot water range. 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. A pool, battery or air conditioning build works the same way on a different engine.
Preview a different build
Same engine, same numbers. Every build is laid out and styled to the brand, so no two look alike.
Example postcode. Enter your own for local figures.
Recommended
HP-280
About the demonstration. The residential products and figures are illustrative and are not a real range. The commercial tab is different: it reads the live VEU and ESS registers, so those brands, models and certificate values are real. Full disclosure on the residential hot water page.
Turning visitors into enquiries
A few questions about the site, then the email address, then the recommendation. The order is deliberate. Someone will hand over an address while they still want the answer, and far less often once they already have it.
They get a specific model, what it delivers for their situation, and why their answers point to that one. You get a named lead with every answer attached, so whoever picks up the phone already knows what the call is about.
Question 1 of 7
How many bedrooms?
How it's delivered
Two options, and you pick one. Most brands embed it; the hosted page suits anyone whose website is slow to change or locked down by an agency.
Option 1: embedded in your site
One line of code drops the calculator into a page you already have. Works with Shopify, WordPress, Webflow, Squarespace and anything else that lets you paste an embed.
Option 2: hosted by us
We run it at your own address, calculator.yourbrand.com, and you link to it. Nothing to install and nothing for your web team to maintain.
It stays current
Energy prices move, and every running-cost and payback figure moves with them. In Australia there is a second layer on top: STCs step down every January, VEU and ESS methods change, certificate prices move daily and product registrations lapse. Standards move as well, and a sizing tool built against a superseded edition gives an answer a building surveyor will reject.
Ours read tariff and incentive data live from our own platform API rather than from a hardcoded table, and we handle scheme and standard changes at our end. Your customers see today's numbers.
Why the numbers hold up
We are an engineering consultancy that does the modelling, the scheme registrations and the compliance work. The calculators run the same engines: AS/NZS 4234 in TRNSYS for hot water, and the AS 5352:2022 method for pool heating.
We can show how any figure was derived if a customer, an installer or a regulator asks.
The calculation stays on our server
The method, the coefficients and the climate data never reach the browser. The page collects the inputs, our server runs the calculation, and only the answer comes back.
That matters for two reasons. Your pricing and your product data are not sitting in a page anyone can read, and standards content we are licensed to use does not get republished by being embedded in a website.
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. Every build is different, so we price them individually rather than off a list.
Request a quote