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Inverter vs Non-Inverter AC: Which One Should You Buy?
25 Oct 2026 · 2 min read
Not sure whether to buy an inverter or a non-inverter AC? Compare how they work, running cost, repair needs and which room sizes suit which tonnage.
Overview
Both types of AC cool a room, but they control the compressor in different ways. This affects the electricity bill, the noise and how the AC behaves over the years.
How they work
A non-inverter AC runs the compressor at full speed and switches it off when the room reaches the set temperature. It switches on again when the room warms up. An inverter AC changes the compressor speed, so it cools fast at the start and then runs slowly to hold the temperature.
Main differences
Electricity use: inverter ACs usually use less power, especially when they run for many hours every day.
Price: non-inverter ACs usually cost less to buy.
Noise and comfort: inverter ACs hold a steadier temperature and are often quieter once the room is cool.
Repairs: inverter models have more electronic parts, so some faults need a skilled technician and the right board or part.
Which one suits you?
If the AC will run six hours a day or more, an inverter model is usually worth the extra cost. If it is used only for a few hours in a guest room, a non-inverter AC can make sense.
Choosing the right tonnage
As a rough guide, 1 ton suits a small room up to about 110 square feet, 1.5 ton suits a medium room up to about 180 square feet and 2 ton suits a larger room. Sun-facing walls, top-floor rooms and kitchens need more capacity. Always check the maker's guidance for your room.
Look at the star rating
A higher star rating means better energy efficiency. Compare the rating, the warranty on the compressor and the availability of service in your area before you buy.
If the AC runs for many hours every day, an inverter AC usually saves more electricity over the season. For light use the saving may not cover the higher price.
Are inverter ACs costly to repair?
Some electronic parts can cost more than in a non-inverter AC, but regular service and stable voltage help avoid many faults.
What AC tonnage should I choose for a bedroom?
For a typical bedroom, 1 to 1.5 ton is common, depending on the size, sunlight and number of people. Check the room area before you decide.
Need a technician in Lucknow?
RR Cooling Point visits homes, shops and offices across Lucknow. We inspect the fault, explain it and share the cost before any work starts.