Aircon & heat pump tools you can use right now.
Three free calculators and reference tools we use ourselves on quote day. Work out what size aircon fits your room, what it’ll cost to run, or what that flashing fault code on your existing unit actually means.
Size it right
Work out what your home actually needs before anyone quotes you.
2 toolsAircon Sizing Calculator
What size aircon does this room need?
Get the right kW rating for your room in seconds. Enter the room dimensions, ceiling height, orientation and insulation. The calculator handles the industry-standard heat-load formula so you don't quote the wrong size.
- Australian residential heat-load formula
- Adjusts for ceiling height, orientation, insulation, glazing, occupants
- Recommends a cooling capacity range (kW) + closest standard model size
Heat Pump Sizing Calculator
What size hot water tank does my home need?
Most guides just count bedrooms. This one sizes off what your household actually draws, shower flow, shower length, how many people go through before work, then gives you the tank size, recovery rate and full reheat time.
- Works out the real hot-water fraction of a mixed shower (a 9 L/min head only pulls ~5 L from the tank)
- Sizes on 80% usable capacity, not the number on the badge
- Reheat time + L/hr recovery for your chosen COP and compressor
What it'll cost
Running costs, rebates and payback. Real numbers, not sales maths.
3 toolsVEU Rebate Estimator
How much rebate can I claim?
Enter your postcode, current system and planned upgrade, get the estimated Victorian Energy Upgrades rebate range and your net out-of-pocket install cost. Covers hot water and space heating/cooling upgrades.
- Every VEU upgrade path (gas / electric → heat pump, gas ducted → RC)
- Household size + solar adjustments for hot water
- Rebate range + net install cost after rebate
Hot Water Savings Calculator
How much will a heat pump save me?
Compare your current gas or electric hot water annual cost against a modern heat pump. Applies the Victorian VEU rebate to the install cost and projects the payback period over 10 years, the fastest way to see if the upgrade actually pays for itself.
- Handles gas storage, gas continuous, electric peak, off-peak and solar-boost
- VEU rebate applied to net install cost
- Payback in years + 10-year total savings
Running Cost Calculator
What will this cost me to run?
Estimate the electricity cost of running an aircon or heat pump per day, week and year. Uses your unit's kW input (or capacity + COP), your usage hours and your electricity price to project the real running cost.
- Works for split, multi-head, ducted and heat pump hot water
- COP + capacity → kW input conversion built in
- Shows cost per day, per week and per year at your electricity rate
Compare systems
Side-by-side on the specs that decide it.
3 toolsGas vs Reverse-Cycle Heating
Which is cheaper to run this winter?
Compare the annual winter running cost of a gas ducted heater against a reverse-cycle (heat pump) system for your home. Enter heat load, hours, star rating, COP and tariffs, get the payback if you swap.
- 3 to 6-star gas efficiency + inverter reverse-cycle COP
- Annual saving + payback with VEU rebate applied
- 10-year net saving projection
Heat Pump Compare
Reclaim vs iStore vs Thermann vs Sanden vs Rheem.
Cross-brand heat pump hot water comparison, CO₂ vs R290 vs R134a, capacity, warranty, COP, price band, made-in and our installer take. Pick 2-5 models to compare side-by-side.
- Every major HW heat pump brand we service
- Refrigerant type, COP, warranty, install range
- Pros / cons + our default recommendations
System Type Comparison
Split vs multi-head vs ducted vs gas vs evap.
Side-by-side comparison of the five main home climate-control options, install cost, running cost, zone control, lifespan, best-for scenarios and which brands we install for each. Pick 2-5 systems to compare.
- 5 system types · toggle any 2-5 to compare
- Real Melbourne install-cost + running-cost ranges
- Pros, cons, brands and rule-of-thumb picks
Rather just have us size / quote it?
Send the room dimensions or a photo of the fault code. We’ll come back with a fixed price.