Anti-Condensation Cluster
Mouldy Aircon Grille & Vent — Black Stains, Musty Smell, Fixed for Good
Black streaks on aircon vent louvres. A musty wet-sock smell in the first minute of cooling. Slime you can wipe off with a finger. Same problem: the grille is colder than dew point, condensate collects, and mould colonises the wet surface. Permanent fix — wash first, then coat.
What you're seeing on the grille
Black streaks radiating from louvres — Cladosporium mould feeding on damp dust. Grey/green fuzz — active biofilm releasing MVOCs (the smell). Pink-orange residue — Aureobasidium common on cold surfaces. Slimy wipe-off — bacterial biofilm mixed with mould spores. All need the same two-step treatment; DIY spray-and-wipe leaves the root and regrows in 4–6 weeks.
Step 1 — Pico X PureSteam (S$90/unit)
Chemical-free water-only cleaning of filters, blower wheel, evaporator fins, drip pan, drainage line and grille. No added cleaning chemicals, fragrances or internal coatings. Full service: /services/aircon-mould-servicing.
Step 2 — Shield22 Pro on grille + bulkhead (from S$380)
After internal wash, coat external grille surface and adjacent bulkhead with Shield22 Pro. Raises grille surface temperature 3–6°C — above room dew point. Condensate stops forming on visible surfaces; nothing for mould to grow on. Cures overnight. 5-year condensation-free warranty.
Combined pricing (wash + coat, one visit)
Single wall unit + bulkhead: From S$470. Single cassette unit + 4-side bulkhead: From S$650. Whole-home 3 units: From S$1,350 bundled. Compare to DIY sprays at S$40 every 6 weeks forever — one visit + 5-year warranty is a permanent fix.
Why different from just aircon servicing
General servicing (S$30–60) cleans and rinses — good for airflow, useless for mould. Our S$90 mould hygiene actively kills mould with 90-day protection — but if condensation keeps forming, mould re-establishes. Shield22 Pro removes the condensation trigger.
Shield22 Pro — the coating that stops condensation at source
Thermal micro-ceramic coating that raises the surface temperature above dew point so airborne moisture stops condensing. From S$18/m². 5-year condensation-free warranty. Non-toxic, low-VOC, safe for occupied rooms.
Related in the Anti-Condensation cluster
Frequently Asked Questions
- Can I just do the wash and skip the coating?
- Yes — many do. Wash alone protects 3–6 months. If mould-free for a year, keep wash-only. If it moulds up faster (typical for rooms above 70% humidity), coating is the permanent fix.
- Is the black stuff actually mould or just dust?
- In Singapore aircon environments, almost always mould. Dust alone doesn't smell musty or regrow after wiping.
- Is it dangerous to breathe?
- Chronic exposure worsens asthma, allergies, sinus infections — especially in children, elderly, immunocompromised. Don't ignore a persistent musty aircon.
- Can I do the wash myself?
- Filter and grille cleaning yes (monthly). Blower wheel, drip pan, and evaporator fin cleaning needs unit dismantle and steam equipment — DIY tools damage fins.
- Does the coating change how the grille looks?
- Thin white coat, matte finish, indistinguishable from factory paint on most units.
Our Team in Action
Trained Pico X Health technicians follow strict containment, PPE, and protocols on every job in Singapore.
Before & After: Real Singapore Jobs
Documented mould remediation across HDB, condo, landed and commercial spaces.
Products We Use & Recommend
Professional-grade equipment and coatings selected for Singapore's humid climate.
Shield23 Pro — Antimicrobial Coating
Long-life inorganic-ion defense applied by trained Pico X Health technicians across hospitals, F&B, schools, and homes.
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