VOC (Formaldehyde) Removal after Renovation

Johnson Group VOC (Formaldehyde) Removal Service; Remove 99% of Formaldehyde (VOC)

Benefits of Using Our Service

  • Eliminate Toxic Contaminants & Pungent Odours instantly
  • Inhibit VOC Gases from Outgassing from Wood Furnishings
  • Activated Carbon for Highest VOC Gases (Formaldehyde) Removal
  • Real-time TVOC, Formaldehyde and PM2.5 Monitoring Through Mobile Phone
  • 100% Natural Fragrance Gel Decomposes Organic Odour (VOC), Purifies Air
  • This service is environmental-friendly, baby-friendly and allergy-friendly

Why do we need to remove VOC (formaldehyde) after renovation?

Formaldehyde (HCHO) is dangerous to human health. Building materials, home furnishings pressed woods, wood floor finishes, paints, upholstery fabrics are often the major sources in homes because materials off-gas formaldehyde over time.

People often spend more than eight hours a day in their homes; infants, kids and the infirm sometimes even spend the entire day inside their home. WHO (2000), Guidelines for Air Quality suggests that the level should below < 100 µg/m3 to avoid acute effects in such individuals.

What is formaldehyde?

Formaldehyde is one of the Volatile Organic Compounds (VOCs). Formaldehyde is a colorless, flammable gas at room temperature, has a pungent, distinct odor, and may cause a burning sensation to the eyes, nose, and lungs at high concentrations. The U.S. Environmental Protection Agency (EPA) has classified formaldehyde as a known human carcinogen. There is some evidence of asthma or asthma-like symptoms for children exposed to formaldehyde in homes.

Why do we measure TVOC reading together with formaldehyde reading?

World Health Organization defined volatile organic compound (VOC) as any organic compound whose boiling point is in the range from 50 °C to 250 °C. VOC can be found within nature environment, furnishings, building materials, glues and carpets. Formaldehyde, acetaldehyde and benzene are examples of VOC.

HK Environmental Protection Department & Finnish Society of Indoor Air Quality and Climate set the TVOC at 200 & 600 μg/m3 or 0.087 ppm & 0.261 ppm as Excellent Class and Good Class respectively.

If we adopt formaldehyde (CH2O) as the only measuring unit, other VOC gases like acetaldehyde and benzene may still be found in homes or offices. For example, if 0 ppm is recorded for formaldehyde, it doesn’t mean there is no other toxic VOC within the space.

Ask for help from our Home Sanitizing Professionals

HK Environmental Protection Department Listed IAQ Contractor (Indoor Air Quality Information Centre)

In keeping our words “Reducing any unnecessary use of toxic chemical to further reduce the impact to the rest of environment”. We use only natural materials to decompose formaldehyde and Volatile Organic Compounds. This service not only can minimize your family from exposing to toxic chemicals but also eliminate harmful contaminants and odours effectively.

Ask for help from our Home Sanitizing Professionals

VOC (Formaldehyde) Removal

Construction Process

  • Measure Total VOC (TVOC) values of indoors and furnishings with RAE® VOC Monitor
  • Measure formaldehyde (HCHO) values of indoors and furnishings with RAE® HCHO Monitor
  • Air wash indoor air by axial fan ventilation kit
  • Vacuum wood furniture and fabric upholsteries with Miele Allergy Vacuum Cleaner
  • Space fogging with SafePRO® Formaldehyde (VOC) & Odour Remover
  • Measure again the overall value of TVOC and formaldehyde with RAE® monitors


VOC (formaldehyde) level will be improved dramatically after the removal treatment. It is, however, there is a chance that a small amount of formaldehyde may still gas-off from treated furnishings over a week after the service. It is recommended to keep wardrobes and cabinets as well as windows open to avoid any accumulation.

Exclusions and Limitations

Johnson Group is not responsible for:

Wear, damage or stains that cannot be completely cleaned or removed
Any wear or discolouring of fabric or surfaces becoming more visible once dirt/stain has been removed
Any loss incurred as a result of any breakage or damage to goods and any loss of property

Non Refund Policy

Johnson Group will provide clear information and procedure to products and services; having comprehensive evaluation to our products and services before your purchase decision.

Placing an order means you agree and fully accept to purchase products or services in accordance with the Terms and Conditions of the Non Refund policy set out herein. There is no refund when you purchased our products or services.

RAE® VOC Monitor

RAE® VOC Monitor is the most advanced handheld volatile organic compound (VOC) monitor on the market. Its photoionization detector’s (PID) extended range of 0 to 15,000 ppm and a rapid three-second response time makes it an ideal instrument for detection.

RAE® HCHO Monitor

RAE® HCHO Monitor is an state-of-the-art portable wireless gas monitor. The monitor is equipped with real time reading of gas concentration function and PID measurement for formaldehyde ranging from 0 to 10 ppm.

Johnson Group Allergy Test: IAQ and PM2.5 Test

Miele Allergy Vacuum Cleaner

  • “Excellent Air Hygiene” proven by DMT
  • “Suitable for Allergy Sufferers” proven by TÜV
  • The first to comply with HEPA Class 13 as a complete system (EN 1822)
  • The only system approved to be used in the hospitals (BS 5415)

SafePRO® Formaldehyde (VOC) & Odour Remover

Most conventional odour solutions consist of applying fragrances to mask the problem. The chemical constituents of SafePRO® Formaldehyde (VOC) & Odour Remover are highly active organic compounds including sugar derivatives and peptides. These compounds form complexes through hydrogen bonding thus encapsulating the offending odour molecules. SafePRO® significantly reduces odours like formaldehyde (VOC), paint and adhesives etc. replacing them with a refreshing scent.

SafePRO® Formaldehyde (VOC) & Odour Remover complies with all OECD Guidelines for Toxicity. The VOC removal efficiency by using SafePRO’s formulations have been calculated to be 90-99% and is proven by ANSTO’s Environmental Science Program and The University of NSW.

Benefits of using SafePRO® Formaldehyde (VOC) & Odour Remover

  • Reduces malodours (Formaldehyde / Volatile Organic Compound odours)
  • Leaves a clean and refreshing scent
  • Harmless to people, pets and environment, Eco friendly product
  • Safe, Non-toxic & Hypoallergenic
  • Non-perfumed, Non-corrosive, Non-irritating smell
  • Made in Australia
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