Every company here quotes GST differently, so the sticker prices are not comparable until you normalise them, and once you do the ranking moves. Re-read off the companies' own sites on 14 October 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 from three units up that published table is cheaper than the promo the homepage is advertising. 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, now on a pricing page of its own rather than the homepage, and still does not say whether GST is included. Three things changed in September. Four of the five publish a fee just to diagnose a unit that has already stopped working, S$42.80 to S$54.50, and most of them waive it if you take the repair. Billy publishes a full annual contract ladder, from S$200 for two units to S$400 for six. And all four promotions on LK Brothers' homepage, including the S$19/unit Diamond rate, now link to pages that return a 404. Below: five companies, their published rates, the contract maths, the fine print on the multi-unit ladder, and the real opening hours.
Five companies, prices read off their own sites on 14 October 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: if the unit is already broken, four of the five charge S$42.80–S$54.50 just to look.
Around since 2007, Cool Earth built its reputation on transparent, itemised pricing, which is unusual in an industry where 'WhatsApp for quote' is the default. That pricing has moved: the full ladder no longer sits on the homepage, which now advertises only "2 units just S$55", and lives instead on a dedicated servicing-price page.PRICES: The rates themselves are unchanged on a 14 October re-read: S$50 for a single unit, 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.GST GAP: One gap in the transparency, and it is the important one: nowhere on the site does it 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.CONTRACT AND DIAGNOSIS: Two numbers the company publishes itself are worth knowing before you commit. Its own FAQ prices the 2-unit annual contract at S$200 against S$220 for four separate ad-hoc visits, a saving of S$20, which is the thinnest contract discount on this page. And if the unit has already stopped working, diagnosis is S$40 to S$50, waived if you go ahead with the repair; there is no call-out fee on a standard service booking. Chemical wash runs S$80–100 per unit non-dismantle and S$130–180 for a full overhaul, gas top-up from S$50.OPENING HOURS: Hours are the reason to pick it over the two companies that undercut it on paper: Monday to Saturday 9am to 9pm and Sunday 9am to 8pm, the only one of the three cheap options open on a Sunday or in the evening. Brand coverage runs to Daikin, Mitsubishi, Panasonic, Fujitsu, LG, Samsung and Toshiba, older R22 systems included, with a 90-day workmanship warranty. Booking is by WhatsApp with a reply in minutes, and same-day slots are genuinely available. It rates 4.0 on Google from 66 reviews, the smallest review base here.BEST FOR: a Sunday or evening slot at the cheap ladder's price.
Published rates (now on its own /servicing-price/ page, not the homepage): 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 contract from S$200 for 2 units across 4 sessions, against S$220 booked ad-hoc, by its own FAQ. Chemical wash S$80–100/unit; overhaul S$130–180; gas top-up from S$50. Diagnosis S$40–S$50, waived if the repair goes ahead; no call-out fee on standard servicing. 90-day workmanship warranty. Mon–Sat 9am–9pm, Sun 9am–8pm. GST treatment is not stated anywhere 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, and it is the one that tells you the rules.PRICES: 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), and the price page states that all of it is before 9% GST. Add the 9% and three units is S$76.30, four is S$92.65, which matches 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.FINE PRINT: The rules underneath that ladder are where Billy earns its place. The multi-unit rate applies to a single HDB flat, condo or house at one address and cannot be pooled across locations, so two family flats do not combine into one cheaper booking. Additional charges apply to the CBD and to jobs starting from 6pm. The rates cover standard wall-mounted splits of 9,000 to 24,000 BTU only; ceiling cassette, ducted and commercial systems are quoted separately.ANNUAL CONTRACT: It also publishes an annual contract ladder that most write-ups miss: S$200 for 2 units, S$240 for 3, S$300 for 4, S$360 for 5 and S$400 for 6, four visits a year, before GST, with priority booking inside 24 hours, reminders, a free follow-up within 7 days and 10% off any additional repairs. Three units works out at S$261.60 with GST, against LK Brothers' S$234.35 for the same four visits. There is no single-unit contract.BROKEN UNIT: Diagnosis on a broken unit is S$40 standard or S$50 advanced, before GST, with parts and labour quoted after; there is no call-out fee on servicing.COVERAGE AND HOURS: Coverage is island-wide, hours are Monday to Saturday 9am to 6pm with a 24-hour response guarantee and two emergency teams, and the footer lists NEA refrigerant-handling certification and BCA registration (CRS L1, PPSF/05/00007). Chemical wash S$80–100 non-dismantle, overhaul S$130–180, gas top-up R22 S$50–80, R410A S$60–150, R32 S$80–200, all with a 90-day workmanship warranty. It rates 4.3 on Google from 1,095 reviews, and its price page carries a last-updated date of 5 July 2026.BEST FOR: multi-unit homes at a single address that want the fine print in writing.
Published rates 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 price page states all prices are before 9% GST. Annual contract, 4 visits: S$200 (2 units) → S$240 (3) → S$300 (4) → S$360 (5) → S$400 (6), before GST, with 10% off extra repairs. No 1-unit contract. Diagnosis S$40 standard / S$50 advanced, before GST; no call-out fee on servicing. Non-dismantle chemical wash S$80–100/unit; full overhaul S$130–180/unit. Gas top-up R22 S$50–80, R410A S$60–150, R32 S$80–200. Fine print: multi-unit rate is one address only, extra charges for the CBD and jobs from 6pm, and the ladder covers 9,000–24,000 BTU wall splits only. 90-day workmanship warranty, 24-hour response. Mon–Sat 9am–6pm.
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.RATE CARD: 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.WHY IT MATTERS: 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 single-unit rate on this page. Second, from three units up the advertised promo costs more than the rate card: S$81.75 against S$76.30 at three, S$109 against S$92.65 at four.CONTRACTS: The same page publishes the contract ladder in full, which nobody else here does at every unit count: quarterly (4 visits) at S$190.75 for 2 units, S$234.35 for 3, S$288.85 for 4, S$365.15 for 5 and S$430.55 for 6, and tri-yearly (3 visits) at S$159.14, S$213.64, S$257.24, S$311.74 and S$366.24, all inclusive of GST. Run the sums and the quarterly contract saves 23% at three units and 22% at four, but the tri-yearly one saves under 7.5% at any unit count, so the visit count is what decides whether a contract is worth signing. Inspection under contract is free, and ad-hoc troubleshooting is S$43.60 inclusive of GST (S$163.50 for VRV/VRF), waived entirely if the fault is repaired on site.CAUTIONS: Seven fan coils or more is quoted on request rather than published, as are Sentosa, Jurong Island and other restricted areas. Every one of the four homepage promotions, Gold, Diamond at S$19/unit, the chemical wash and the yearly contract, links to a page that returns a 404, and the site's own sitemap carries no page for any of them, so the S$19 Diamond rate has no published terms at all. And the hours are tight: Monday to Saturday 8.30am to 5.30pm, closed Sunday. It rates 4.9 on Google from more than 480 reviews.BEST FOR: a single unit, and the 4-visit contract at 3-4 units.
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) → S$124.26 (6); 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. Contracts, also incl. GST: quarterly (4 visits) S$190.75 (2) → S$234.35 (3) → S$288.85 (4) → S$365.15 (5) → S$430.55 (6); tri-yearly (3 visits) S$159.14 (2) → S$213.64 (3) → S$257.24 (4). Troubleshooting S$43.60 incl. GST (VRV/VRF S$163.50), waived if repaired on site; free inspection under contract. Homepage promos, all before GST: Gold S$25/unit (min 2, U.P. S$40), Yearly Contract S$215 for 3 units / 4 visits, Chemical Wash S$210 for 3 units. From 3 units up the rate card beats the Gold promo, and all four promo links 404. 7 fan coils or more, and Sentosa or Jurong Island, quoted on request. 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.PRICES: 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, marked 'rates are subject to change'. The quarterly subscription now runs further than it did, to eight units: S$70 a visit for 2, S$85 for 3, S$100 for 4, S$115 for 5, S$130 for 6, S$145 for 7 and S$165 for 8. Gas top-ups run S$100–130 for R22, S$130–165 for R410 and S$180 for R32; a chemical overhaul is quoted by BTU, and repair and cassette or ducted servicing are case by case, so there is no published diagnosis fee to compare.THE CATCH: Nothing on that page states whether GST is included, the same gap as Cool Earth. Nothing on 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 at both LK Brothers and Billy, while the 3-unit subscription comes to S$340 a year against LK Brothers' S$234.35. And the model is different from everyone else here: the rebuilt homepage now describes an 'Everyworks Trusted Partner Network' of 'selected and vetted partners', so you are booking a platform that assigns a team, not the in-house crew that Billy Aircon makes a selling point of.REVIEWS AND HOURS: The review figure has at least settled. The homepage widget now shows one number, 4.9 from 16,176 reviews, where in August the same page carried 13,895 in one block and 16,080 in another; treat it as a platform-wide aggregate across every trade, not an aircon score. All work carries the '30-Day Everyworks Guarantee' rework policy (T&Cs apply). Hours are 8am to 10pm daily, the widest here, and that convenience is what the premium buys. The office at 1090 Lower Delta Road is admin only, with no showroom and no walk-ins.BEST FOR: booking entirely by chat, seven days a week.
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, now to 8 units: S$70 (2) → S$85 (3) → S$100 (4) → S$115 (5) → S$130 (6) → S$145 (7) → S$165 (8) a visit. Gas top-up R22 S$100–130, R410 S$130–165, R32 S$180. Chemical overhaul quoted by BTU; repair, cassette and ducted servicing case by case, with no published diagnosis fee. GST treatment is not stated, and rates are marked subject to change. No public discount code, and quotes still run over WhatsApp. '30-Day Everyworks Guarantee' rework policy (T&Cs apply). Daily 8am–10pm, no showroom or walk-ins.
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. A 90-day workmanship warranty applies, and the hotline runs 8am to 10pm daily.PRICES: 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) and S$109–S$218 (R32). Its troubleshooting page adds the number that matters on a broken unit: S$42.80 inclusive of GST to diagnose the fault, waived if you go ahead with the repair, which is the lowest published diagnosis fee on this page. Read the list carefully before you price against it, though: it covers condenser cleaning and refrigerant work, not a standard multi-unit fan coil service, so none of those figures can be set against Cool Earth's S$70 for three units.BEST FOR: landed homes with multiple systems, light commercial spaces, or an unusual brand mix, rather than routine HDB maintenance. It rates 4.9 on Google from 11,260 reviews, with new ones posted through mid-September 2026.
Published price list, all 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; gas top-up R22 S$65.40–S$130.80 / R410A S$87.20–S$163.50 / R32 S$109–S$218. Troubleshooting S$42.80 incl. GST, waived if you take the repair, the lowest published diagnosis fee here. VRV/VRF, ducted and chilled-water systems quoted separately. 90-day workmanship warranty. Hotline 8am–10pm daily.
| Company | General servicing | Diagnosis on a broken unit | Annual contract | Hours | 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; now on its own pricing page | S$40–S$50, waived if the repair goes ahead; no call-out fee on servicing | From S$200 / 2 units / 4 visits, against S$220 ad-hoc by its own FAQ | Mon–Sat 9am–9pm, Sun 9am–8pm | A Sunday or evening slot at the cheap ladder's price |
| Billy Aircon | Same ladder: S$50 (1) → S$85 (4) → S$16/unit at 10+, stated as before 9% GST; one address only, CBD and after-6pm extra, 9,000–24,000 BTU wall splits | S$40 standard / S$50 advanced, before GST (S$43.60 / S$54.50); no call-out fee on servicing | S$200 (2) → S$240 (3) → S$300 (4) → S$360 (5) → S$400 (6), before GST; no 1-unit contract | Mon–Sat 9am–6pm, 24-hour response | Landlords with several flats at one address |
| LK Brothers | Rate card, 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. 7+ units on request | S$43.60 incl. GST (VRV/VRF S$163.50), waived if repaired on site; free under contract | Quarterly, incl. GST: S$190.75 (2) → S$234.35 (3) → S$288.85 (4). The cheapest contract here; its 3-visit version saves under 7.5% | Mon–Sat 8.30am–5.30pm, closed Sun | A single unit, and the 4-visit contract at 3–4 units |
| 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 published; repair quoted case by case | Quarterly subscription to 8 units: S$70 (2) → S$85 (3) → S$165 (8) a visit; 3 units is S$340 a year | Daily 8am–10pm | Booking entirely by chat, seven days a week |
| SoCool | No fan-coil rate published; condenser cleaning S$54.50 incl. GST; chemical wash S$87.20–S$130.80 | S$42.80 incl. GST, waived if you take the repair. The lowest here | Not published | Hotline 8am–10pm daily | 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 on its price page that all its prices are before 9% 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 x 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. The ladder has moved since our last check: it is no longer on the homepage, which now advertises only "2 units just S$55", and sits on a dedicated servicing-price page instead. 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.
Everything above prices a unit that still works. If yours has already stopped cooling, the first number on the bill is a diagnosis fee, and four of the five publish one:
None of this applies to a routine service booking. Cool Earth and Billy both state there is no call-out fee on standard servicing, and LK Brothers makes inspection free under a maintenance contract. The fee is what you pay when the unit is already broken and nobody yet knows why, and the waiver is the part worth confirming, because it turns a S$43.60 wasted trip into nothing if you accept the quote.
LK Brothers is the only one of the five that publishes contract prices at every unit count, inclusive of GST, which makes the comparison easy to run:
Against the same number of separate one-time bookings, the quarterly contract saves 23% at three units and 22% at four, but only 12.5% at two and 13% at six. The three-visit contract barely moves at all: S$4.36 saved at two units, S$6.54 at six, and never more than 7.5% anywhere on the ladder. So it is the four-visit contract at three or four units that actually pays. One thing in LK Brothers' favour: its S$215 homepage contract promo is S$234.35 with GST, exactly the rate card figure, which makes it the one homepage promotion here that is not dearer than the published table.
Billy Aircon publishes its own annual ladder, quoted before GST: S$200 for 2 units, S$240 for 3, S$300 for 4, S$360 for 5 and S$400 for 6, four visits a year, with priority booking inside 24 hours, a free follow-up within 7 days and 10% off any additional repairs. Add the GST and three units is S$261.60, against LK Brothers' S$234.35 for the same four visits. Billy does not sell a contract for a single unit.
Cool Earth's own FAQ does the sum for you, and the answer is small: S$200 a year for 2 units against S$220 for four separate ad-hoc visits, a saving of S$20. Everyworks lists a quarterly subscription that now runs to eight units, at S$70 a visit for 2, S$85 for 3, S$100 for 4, S$115 for 5, S$130 for 6, S$145 for 7 and S$165 for 8, so three units across four visits is S$340 against LK Brothers' S$234.35.
A multi-unit rate is a single-address rate. Billy Aircon's pricing terms say the per-unit price applies to one HDB flat, condo or house at the same address and cannot be split across locations, so two flats in the family cannot be pooled into one cheaper booking. The same terms add charges for the CBD and for jobs starting from 6pm, and limit the ladder to standard wall-mounted splits of 9,000 to 24,000 BTU, with ceiling cassette, ducted and commercial systems quoted separately.
LK Brothers stops publishing at six fan coils and quotes seven or more on request, along with Sentosa, Jurong Island and other restricted areas. Everyworks prices cassette and ducted servicing case by case too. If your home is a landed property with eight units, only Cool Earth and Billy have a published number for it: S$18 a unit at 7 to 9, and S$16 at 10 or more.
LK Brothers advertises four promotions and not one of them has a page. Alongside Gold at S$25/unit, the homepage lists Diamond Servicing at S$19/unit (U.P. S$40), a chemical wash at S$210 for 3 units and a yearly contract at S$215 for 3 units. All four Read more and Learn more buttons point at installation.html, repair.html or maintenance.html, and every one of those returns a 404. The site's own sitemap carries no page for any of them either, so the S$19 Diamond rate has no published minimum, contract length or scope anywhere. Treat S$19 as a quote to ask for, not a rate you can book.
Opening hours differ more than the prices do. Billy Aircon works Monday to Saturday, 9am to 6pm, and LK Brothers Monday to Saturday, 8.30am to 5.30pm. Both are shut on Sunday. Cool Earth publishes Monday to Saturday 9am to 9pm and Sunday 9am to 8pm, which makes it the only one of the three cheap options you can book for a Sunday or an evening. Everyworks takes bookings 8am to 10pm every day and SoCool's hotline runs 8am to 10pm daily, and that availability is a fair part of what the higher Everyworks rate buys. If a weekend or evening slot is the actual constraint, it decides this 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.
Not for a routine service booking, but they do charge to diagnose a unit that has already stopped working, and that is a separate fee worth asking about before the technician sets off. Cool Earth and Billy Aircon both state there is no call-out fee on standard servicing, and LK Brothers makes inspection free for maintenance-contract customers. For a fault call, four of the five publish a figure: SoCool charges S$42.80 inclusive of GST, LK Brothers S$43.60 inclusive of GST for a standard unit and S$163.50 for VRV/VRF, Cool Earth S$40 to S$50, and Billy Aircon S$40 for standard troubleshooting or S$50 for advanced, before 9% GST, which is S$43.60 and S$54.50 once added. Everyworks publishes no diagnosis figure at all and prices aircon repair case by case. The part that matters more than the amount is the waiver: SoCool, LK Brothers and Cool Earth all drop the fee if you accept the repair, and LK Brothers charges nothing at all if the fault is fixed on the spot, so an unsuccessful visit is the only one you actually pay for. Repairs themselves are quoted separately after the diagnosis, and a gas top-up or a capacitor replacement is the most common thing to come out of one.
At three or four units on a four-visit contract, clearly yes. Anything less and the discount thins out fast. LK Brothers publishes the whole ladder inclusive of GST, so you can check it yourself: quarterly contracts at S$190.75 for 2 units, S$234.35 for 3, S$288.85 for 4, S$365.15 for 5 and S$430.55 for 6, against four separate one-time bookings at S$54.50, S$76.30, S$92.65, S$109 and S$124.26 a visit. That works out at a 23% saving at three units and 22% at four, but only 12.5% at two and 13% at six. Its three-visit contract is the one to skip: S$159.14 for 2 units against S$163.50 booked separately is a saving of S$4.36, and nowhere on that ladder does the three-visit version save more than 7.5%. Billy Aircon's annual contracts are S$200 for 2 units, S$240 for 3, S$300 for 4, S$360 for 5 and S$400 for 6, quoted before GST, with priority booking inside 24 hours and 10% off extra repairs, so three units is S$261.60 all-in against LK Brothers' S$234.35; Billy does not offer a single-unit contract. Cool Earth's own FAQ prices its 2-unit contract at S$200 against S$220 ad-hoc, a S$20 saving, and Everyworks' quarterly subscription is S$85 a visit for 3 units, or S$340 a year. The test is always the same: multiply your own unit count's one-time rate by the number of visits and compare that total against the contract price, never against the per-unit sticker rate. Two things to confirm before signing: whether the price includes GST, and whether unused visits roll over or lapse if you are away.
