How we score air conditioning contractors in Singapore

Who publishes the rankings

SG Aircon Guide is published by SG Heartland Guides (since 2026), which runs independent home services directories across Singapore. Air conditioning contractors came first. The rankings are maintained by Jacky Lee, Editor, who oversees how the method is applied. You can reach the team at [email protected].

What the score is

Every one of the 649 businesses we currently list gets a composite score from 0 to 100. It is built from five measured signals, each with a fixed weight. The same rubric applies to every business. Nobody adjusts a number by hand.

The five signals, heaviest first

Signal	Weight	What it measures
Sentiment	28%	Synthesis of recent review themes: praise versus complaints
Rating	26%	Google aggregate star rating
Volume	20%	How many reviews, log-scaled
Recency	13%	How recently customers reviewed
Completeness	13%	Whether phone, website, hours and address are listed

Sentiment (28%)

This carries the most weight because a star average hides patterns. Two contractors can both sit at 4.6 stars, yet one keeps collecting the same complaint: technicians turning up late, a leak after chemical wash, a quoted price that grew on the day. Only reading what recent reviews actually say catches that. We look at the themes that repeat, both good and bad, and score the balance.

Rating (26%)

The Google star average is still a useful summary of overall satisfaction, and it is easy to compare. We weight it heavily, but below sentiment, because it is a blunt number.

Volume (20%)

A 4.8 from nine reviews tells you less than a 4.6 from several hundred. Volume is log-scaled, so going from 5 to 50 reviews counts for far more than going from 500 to 545. A handful of reviews never equals hundreds.

Recency (13%)

Aircon servicing depends on the people currently doing the work. A firm that was excellent three years ago may have changed staff or practices. Recent reviews tell you how it performs now.

Completeness (13%)

We check whether a phone number, website, opening hours and address are listed. A business you can easily call, find and visit is simpler to deal with, especially when your unit fails in the middle of the night or on a hot weekend.

Scores are earned, never edited

Scores come from this rubric and the data only. They are never edited by hand. Paid placement, when it exists, is always labelled as sponsored and never changes a score. If a list's picks or order were reviewed by an editor, that list says so on the page itself. See an example in our best aircon servicing and repair list.

Honest limits

• Low-confidence scores. A business with few recent reviews gets a score we label low confidence. Treat it as a starting point, not a verdict.
• We synthesise, not republish. We summarise review themes in our own words and link out to Google so you can read the source reviews yourself.
• Reviews are imperfect. They can be skewed by a few angry or enthusiastic customers, and we cannot verify every one.
• A score is not a quote. It does not tell you price or whether a firm suits your specific unit. Get at least two quotes.

How fresh the data is

We refresh listing data monthly. Each listing carries a "last verified" stamp so you can see when it was last checked. If something is wrong, write to us at [email protected] and we will look at it. Start browsing from the home page.