Free air conditioning tools
Quick, free calculators for homeowners and installers — powered by the same Manual J-style engine that runs inside Vento.
Air conditioning size calculator
What size air con do you need? Get the kW and BTU capacity for any room from its dimensions, glazing and insulation.
Open toolRunning-cost calculator
Estimate the annual electricity cost, energy use and CO₂ of an air-conditioning unit from its efficiency and usage.
Open toolWin more installs, with less admin.
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