Every company here quotes GST differently, so the sticker prices are not comparable until you normalise them, and once you do the ranking moves. Read off the companies' own sites on 7 September 2026: LK Brothers' homepage sells Gold Servicing at S$25/unit with a two-unit minimum, but its separate pricing page lists one-time servicing at S$43.60 for a single fan coil, S$54.50 for two, S$76.30 for three and S$92.65 for four, all inclusive of 9% GST and transport. So you can book a single unit after all, and from three units up that published table is cheaper than the promo the homepage is advertising (S$76.30 against S$81.75; S$92.65 against S$109). Billy Aircon states its ladder is quoted before GST, and once you add it Billy lands on S$76.30 at three units and S$92.65 at four, identical to LK Brothers to the cent. Cool Earth runs the same sticker ladder but does not say whether GST is included, which is the one question worth asking before you book. Everyworks does publish a rate card, on a price page reachable only from its footer: S$65 for one fan coil and S$95 for three, the dearest on this list. Below: five companies, their published rates, warranty lengths, the contract maths, and the hours they actually work.
Five companies, prices read off their own sites on 7 September 2026. The cheapest one changes with how many units you book.
> Quick view: A single fan coil is cheapest at LK Brothers, S$43.60 all-in (9% GST and transport included), not the S$25/unit its homepage advertises, which carries a two-unit minimum. Three units or more costs S$76.30–S$92.65 at whichever of the top three you pick. The catch: LK Brothers' headline promo is dearer than its own published price list from three units up.
Around since 2007, Cool Earth has built its reputation on transparent, itemised pricing: every line item is shown on the homepage before any booking, which is unusual in an industry where 'WhatsApp for quote' is the default. Published rates start at S$50 for a single unit and step down sharply with volume: S$55 for 2, S$70 for 3, S$85 for 4, S$100 for 5, S$115 for 6, then S$18/unit at 7–9 and S$16/unit at 10 or more. It also runs annual maintenance contracts from S$200 for 2 units across four sessions a year. One gap in the transparency, and it is the important one: nowhere does the site say whether those flat prices include 9% GST. Billy Aircon quotes the identical ladder and states plainly that its figures are before GST, so it is worth asking Cool Earth directly, because the answer is the difference between being the cheapest at three units or more and merely tying. Brand coverage runs to Daikin, Mitsubishi, Panasonic, Fujitsu, LG, Samsung and Toshiba, older R22 systems included, with a 90-day workmanship warranty on every job. Booking is WhatsApp-led with replies typically inside a few minutes, and same-day service is genuinely available.
Published rates: S$50 (1 unit) → S$55 (2) → S$70 (3) → S$85 (4) → S$100 (5) → S$115 (6), then S$18/unit at 7–9 and S$16/unit at 10+. Annual maintenance contracts from S$200 for 2 units across 4 sessions. Chemical wash S$80–100/unit; overhaul S$130–180. 90-day workmanship warranty. GST treatment is not stated on the site, so ask before booking.
Operating since 2003 with a 26-strong technician team and over 15,000 jobs completed, Billy Aircon is the high-volume HDB specialist on this list. The team size is what lets them back up a 24-hour response guarantee that smaller outfits simply can't promise. Pricing follows the same sliding tier as Cool Earth (S$50 for one unit, S$55 for two, S$70 for three, S$85 for four, down to S$16/unit at 10 or more), which makes them genuinely useful for landlords managing several tenanted flats from one booking. The difference is that Billy tells you the rule: its price list carries the line that all prices are before GST. Add the 9% and three units is S$76.30, four is S$92.65, which happens to match LK Brothers' published GST-inclusive table to the cent, so at three units or more these two are the same price and the choice comes down to hours and response time. Coverage is island-wide (Bedok, Tampines, Yishun, Jurong and basically every estate in between) and they support the standard residential brand list. Chemical wash starts at S$80 non-dismantle and runs S$130–180 for a full overhaul, with a 90-day workmanship warranty.
Published rates from S$50 (1 unit) → S$55 (2) → S$70 (3) → S$85 (4), then S$18/unit at 7–9 and S$16/unit at 10+; the site states all prices are before 9% GST. Non-dismantle chemical wash S$80–100/unit; full chemical overhaul S$130–180/unit. Gas top-up R22 S$50–80, R410A S$60–150, R32 S$80–200. 90-day workmanship warranty, 24-hour response.
LK Brothers publishes two price lists, and most write-ups only ever quote the wrong one. The homepage sells Gold Servicing at S$25/unit with a two-unit minimum (U.P. S$40), a chemical wash promotion at S$210 for 3 units, and a yearly contract at S$215 for 3 units covering all four quarterly visits (U.P. S$280), every figure before 9% GST. The separate pricing page carries the company's actual rate card, inclusive of 9% GST and transport: one-time general servicing at S$43.60 for 1 fan coil, S$54.50 for 2, S$76.30 for 3, S$92.65 for 4, S$109 for 5 and S$124.26 for 6; chemical wash at S$87.20 for 1, S$163.50 for 2, S$228.90 for 3 and S$70.85/unit from 4 up; chemical overhaul at S$152.60 for 1, S$283.40 for 2 and S$130.80/unit from 3 up. Two consequences. First, the two-unit minimum is a condition of the promo, not of the company, so you can book a single fan coil for S$43.60, which is the cheapest one-unit price on this page. Second, from three units up the advertised promo is the dearer option: S$81.75 against S$76.30 at three units, S$109 against S$92.65 at four. The yearly contract, on the other hand, is a genuine saving: S$234.35 with GST against S$305.20 for four separate 3-unit bookings, or 23% off. Two cautions: the homepage also advertises a Diamond Servicing tier at S$19/unit whose Read more link 404s and whose terms appear nowhere on the site, and the office works Monday to Saturday, 8.30am–5.30pm, closed Sundays, the narrowest hours here.
Published rate card (incl. 9% GST + transport): servicing S$43.60 (1 unit) → S$54.50 (2) → S$76.30 (3) → S$92.65 (4) → S$109 (5); chemical wash S$87.20 (1) → S$163.50 (2) → S$228.90 (3); overhaul S$152.60 (1) → S$130.80/unit from 3. Homepage promos, all before GST: Gold Servicing S$25/unit (min 2, U.P. S$40), Yearly Contract S$215 for 3 units / 4 visits (U.P. S$280), Chemical Wash S$210 for 3 units. From 3 units up the rate card beats the promo. 90-day workmanship warranty. Mon–Sat 8.30am–5.30pm, closed Sun.
Everyworks runs as a one-stop home services platform (aircon plus plumbing, electrical, and handyman) and has the strongest digital booking experience on this list. The whole flow happens through WhatsApp: you message a description or photo of the issue and their 'Smart Diagnosis' team replies with a quote, no phone calls involved. It does publish aircon rates, just not on the homepage carrying the 'Upfront & Transparent Pricing' badge. They sit on a separate price page reachable only from the footer, at S$65 for 1 fan coil, S$75 for 2, S$95 for 3, S$110 for 4, S$125 for 5 and S$140 for 6, alongside a quarterly subscription package listed at S$70 a visit for 2 units, S$85 for 3 and S$100 for 4. Gas top-ups run S$100–130 for R22, S$130–165 for R410 and S$180 for R32, and a chemical overhaul is quoted by BTU rather than priced. Two things follow. Nothing on that page states whether GST is included, the same gap Cool Earth has. And none of it is cheap: S$65 for one unit is S$21.40 above LK Brothers' GST-inclusive S$43.60, and S$95 for three is S$18.70 above the S$76.30 that both LK Brothers and Billy charge. The platform shows a 4.9 average from 16,100 reviews, a counter that has been unstable all year (on 25 August 2026 the same homepage carried 13,895 in one widget and 16,080 in another), so treat any exact total loosely. Work is backed by a '30-Day Everyworks Guarantee' (T&Cs apply). Operating hours are 8am–10pm daily, the widest on this page, and that convenience is what the premium buys.
Published rates on its footer price page: one-time servicing S$65 (1 unit) → S$75 (2) → S$95 (3) → S$110 (4) → S$125 (5) → S$140 (6); quarterly subscription S$70 (2) → S$85 (3) → S$100 (4) a visit; gas top-up R22 S$100–130, R410 S$130–165, R32 S$180. GST treatment is not stated. No public discount code, and quotes still run over WhatsApp. '30-Day Everyworks Guarantee' rework policy (T&Cs apply). Daily 8am–10pm.
SoCool is worth knowing if your aircon situation is more complex than a couple of HDB units, because they actively service VRV/VRF, ducted, and chilled-water systems alongside standard residential setups, which most five-best guides skip over entirely. Brand coverage is broader too, including Carrier and Midea on top of the usual Daikin/Mitsubishi/Panasonic/Fujitsu line-up. They handle full part replacements (PCB boards, fan motors, capacitors, expansion valves, thermistors), which means a single visit can resolve issues that smaller outfits would push to a second appointment. 90-day workmanship warranty applies, and the hotline runs 8am–10pm daily. They do publish a price list, and every figure on it is inclusive of 9% GST and transport: condenser normal cleaning S$54.50, dry and steam cleaning S$87.20, chemical wash S$87.20–S$130.80, and gas top-up at S$65.40–S$130.80 (R22), S$87.20–S$163.50 (R410A) or S$109–S$218 (R32). Read the table carefully before you use it to compare, though: it prices condenser cleaning and gas work, not a standard multi-unit fan-coil service, so there is no figure here to set against Cool Earth's S$70 for three. Best for landed homes with mixed systems, light commercial spaces, or unusual brand combinations, not for pricing a routine HDB job.
Published price list: condenser normal cleaning S$54.50; chemical wash S$87.20–S$130.80; gas top-up R22 S$65.40–S$130.80 / R410A S$87.20–S$163.50 / R32 S$109–S$218, all inclusive of 9% GST and transport. 90-day workmanship warranty.
| Company | General servicing | Chemical wash | Warranty | Best for |
|---|---|---|---|---|
| Cool Earth | S$50 (1) → S$55 (2) → S$70 (3) → S$85 (4) → S$18/unit at 7–9 → S$16/unit at 10+; GST treatment not stated | S$80–100 non-dismantle; S$130–180 overhaul | 90 days | Knowing the full price before booking; annual contract from S$200 / 2 units |
| Billy Aircon | Same ladder: S$50 (1) → S$85 (4) → S$16/unit at 10+, stated as before 9% GST | S$80–100 non-dismantle; S$130–180 overhaul | 90 days | 24-hour response; landlords with several flats |
| LK Brothers | Price list, incl. GST + transport: S$43.60 (1) → S$54.50 (2) → S$76.30 (3) → S$92.65 (4). Homepage promo S$25/unit, min 2, + GST is dearer from 3 units up | S$87.20 (1) → S$163.50 (2) → S$228.90 (3), incl. GST | 90 days | A single unit; and the yearly contract (S$234.35 incl. GST / 3 units / 4 visits) |
| Everyworks | Footer price page: S$65 (1) → S$75 (2) → S$95 (3) → S$110 (4) → S$125 (5) → S$140 (6); GST treatment not stated. Dearest here | Not priced; quote via WhatsApp | 30-Day Everyworks Guarantee (T&Cs apply) | Booking entirely by chat, 8am–10pm daily |
| SoCool | No fan-coil rate published; condenser cleaning S$54.50 incl. GST | S$87.20–S$130.80 incl. GST | 90 days | VRV/VRF, ducted and chilled-water systems |
The per-unit sticker price is the most misleading number in this market, because GST is quoted inconsistently and the cheapest-looking companies price by booking size rather than per unit.
Start with GST. Billy Aircon states plainly that all its prices are before GST. LK Brothers' homepage promo rates are also before GST, but its separate pricing page publishes a second table that is inclusive of 9% GST and transport. SoCool quotes inclusive. Cool Earth and Everyworks both publish flat prices without saying either way, so ask. Until you normalise, you are not comparing anything.
The homepage sells Gold Servicing at S$25/unit with a two-unit minimum (U.P. S$40), all before 9% GST. The pricing page, on the same site under a different tab, lists one-time general servicing at S$43.60 for 1 fan coil, S$54.50 for 2, S$76.30 for 3, S$92.65 for 4, S$109.00 for 5 and S$124.26 for 6, every figure inclusive of 9% GST and transport. Two things follow.
You can book a single unit. The two-unit minimum belongs to the homepage promo, not to the company. One fan coil is S$43.60 all-in, and nothing else on this page comes close.
From three units up, the advertised promo costs more than simply booking off the price list. Three units on Gold is 3 × S$25 + GST = S$81.75, against S$76.30 on the table. Four units is S$109 against S$92.65, so the "deal" is S$16.35 dearer. The gap keeps widening with every unit you add.
Billy Aircon's ladder with the 9% it says it excludes, against LK Brothers' published GST-inclusive table:
Cool Earth runs the same sticker ladder as Billy (S$50 / S$55 / S$70 / S$85 / S$100 / S$115, then S$18/unit at 7–9 and S$16/unit at 10+) but is silent on GST. If Cool Earth's flat prices are final, it is the cheapest at three units or more; if 9% goes on top, it simply ties with the other two. That single question is worth asking in the first WhatsApp message.
Everyworks belongs in the comparison too, and it is the dearest here. Its rates are not on the homepage that carries the "Upfront & Transparent Pricing" badge; they sit on a price page reachable only from the footer, at S$65 for 1 fan coil, S$75 for 2, S$95 for 3, S$110 for 4, S$125 for 5 and S$140 for 6. That is S$21.40 above LK Brothers on a single unit and S$18.70 above both LK Brothers and Billy at three. Nothing on that page states its GST treatment either.
LK Brothers' yearly contract is S$215 for 3 units across four quarterly visits, before GST, or S$234.35 once you add it. Four separate one-time bookings for 3 units at S$76.30 each is S$305.20, so the contract saves S$70.85, or 23%. That is a real discount, and it is one of the few on this page that survives the GST normalisation.
Cool Earth also runs annual maintenance contracts, from S$200 for 2 units across 4 sessions a year, and Everyworks lists a quarterly subscription at S$85 a visit for 3 units, which comes to S$340 across four visits against LK Brothers' S$234.35. Price whichever you are considering against four separate bookings at your own unit count, never against the per-unit sticker rate.
LK Brothers advertises a third tier it doesn't explain. Alongside Gold at S$25/unit, the homepage lists Diamond Servicing at S$19/unit (U.P. S$40), but the Read more link behind it returns a 404, and no minimum, contract length or scope is published anywhere on the site. Treat S$19 as a quote to ask for, not a rate you can book.
Opening hours differ more than the prices do. LK Brothers works Monday to Saturday, 8.30am–5.30pm, and is closed on Sundays, the narrowest window here. Everyworks takes bookings 8am–10pm every day; SoCool's hotline runs 8am–10pm daily. If a weekend or evening slot is the actual constraint, that decides it before price does.
Singapore's humidity sits above 80% year-round, so coils and filters clog far faster than in temperate climates and quarterly servicing is the standard advice. Skipping it typically shaves 2–3 years off a unit's lifespan and adds 15–20% to the monthly electricity bill. General servicing (roughly S$44–55 all-in for one unit) is the routine visit; a chemical wash (S$87.20–S$100 a unit) is for weak airflow or a musty smell, every 12–18 months; a chemical overhaul (S$130–180) is the strip-down for a badly neglected or leaking unit, every few years at most.
Gas top-ups and capacitor replacements are the two upsells most often added on-site, so agree upfront that the technician calls before starting any extra work. Prices and promotions change often, so confirm on the company's own site before booking.
For a standard split unit, expect S$43.60–S$55 all-in for one fan coil, and the price per unit drops sharply as you add units. The cheapest single-unit rate published anywhere on this page is LK Brothers' S$43.60, inclusive of 9% GST and transport, and not the S$25/unit its homepage advertises, which needs a minimum of two units and is quoted before GST. Cool Earth and Billy Aircon share the same sticker ladder: S$50 for one unit, S$55 for two, S$70 for three, S$85 for four, S$18/unit at 7–9 and S$16/unit at 10 or more. Billy states those figures are before GST; Cool Earth does not say. A non-dismantle chemical wash is roughly S$80–100 per unit (S$87.20 inclusive at both LK Brothers and SoCool); a full chemical overhaul, where the unit is taken down and stripped, is S$130–180. Gas top-ups vary by refrigerant: around S$50–80 for R22, S$60–150 for R410A and S$80–200 for R32, which needs a licensed handler. Always check whether a quote includes GST and transport before you compare two of them.
For a home unit in regular daily use, every three months is the standard recommendation, because Singapore's year-round humidity above 80% means coils and filters clog far faster than in temperate climates. Households with pets, heavy haze exposure, or units running overnight every night are better off at two-monthly intervals. A chemical wash is not a quarterly job: most units need one only every 12–18 months, or sooner if airflow has dropped noticeably, the unit is dripping, or there's a musty smell when it starts up. If you keep skipping quarterly servicing entirely, expect roughly 15–20% higher electricity costs and 2–3 years shaved off the compressor's life.
General servicing (S$25–50/unit) is the routine visit: filters washed, evaporator surface wiped, drainage pipe vacuumed, and a quick compressor and gas-pressure check. It takes about 15–20 minutes a unit and is what you book quarterly. A chemical wash (S$80–100/unit non-dismantle) adds chemical solution applied to the coils and blower in place, to dissolve the mould and grime that plain wiping can't shift. Book it when airflow weakens or the unit smells. A chemical overhaul (S$130–180/unit) is the full job: the fan coil is dismantled, parts are soaked and cleaned separately, then reassembled. It's the fix for a badly neglected or leaking unit, takes a couple of hours, and is generally worth doing only once every few years.
Four things. First, confirm whether the quoted price includes 9% GST and transport. An S$25/unit rate and an S$27-ish final bill are the same deal, but two companies quoting differently are not comparable until you normalise this. Second, ask for the workmanship warranty in writing; the standard here is 90 days, which means the same fault returning gets fixed free. Third, check the company services your brand and refrigerant, especially for older R22 systems or non-mainstream brands like Carrier and Midea. Fourth, agree upfront on what happens if the technician finds something extra. Gas top-ups and capacitor replacements are the two most common on-site upsells, so ask for a call before any additional work is started rather than a surprise on the final invoice.
LK Brothers, but not at the rate its homepage advertises. Its pricing page publishes one-time general servicing at S$43.60 for 1 fan coil, S$54.50 for 2, S$76.30 for 3 and S$92.65 for 4, all inclusive of 9% GST and transport. That beats everything else on this page at one and two units. Billy Aircon's S$50 and S$55 become S$54.50 and S$59.95 once you add the GST Billy says it excludes. From three units up the two converge exactly: S$76.30 at three and S$92.65 at four, at both companies. Cool Earth quotes the same sticker ladder as Billy but is silent on GST, so it is either the cheapest at three units or more (if S$70 and S$85 are final) or tied, so ask before you book. The trap is LK Brothers' own headline: Gold Servicing at S$25/unit needs a minimum of two units and is quoted before GST, which makes it S$81.75 at three units and S$109 at four, which is S$5.45 and S$16.35 more than simply booking off the company's own price list. Everyworks does publish a rate card, on a footer-only price page, and it is the dearest here at S$65 for one unit and S$95 for three. SoCool prices for VRV/VRF, ducted and chilled-water systems rather than competing on the standard HDB job. The single biggest mistake is comparing a GST-exclusive per-unit rate against a GST-inclusive one.
At three units it clearly is, and you can check the maths yourself. LK Brothers' yearly contract is S$215 for 3 units across four quarterly visits, before GST, or S$234.35 once you add it. Four separate one-time bookings for 3 units at S$76.30 each comes to S$305.20, so the contract saves S$70.85, or 23%. Cool Earth's annual maintenance contracts start at S$200 for 2 units across 4 sessions a year, and Everyworks lists a quarterly subscription at S$85 a visit for 3 units, which is S$340 across four visits against LK Brothers' S$234.35. The test is always the same: multiply your own unit count's one-time rate by four and compare that total against the contract price, never against the per-unit sticker rate, which is what the marketing invites you to do. Two things to confirm before signing: whether the contract price includes GST (LK Brothers' does not), and whether unused visits roll over or lapse if you are away.
