Preventing Air Conditioning Odor Complaints in Hotels: A New Standard from HONU

As temperatures soar during the peak summer months, hotels and inns face a pressing challenge: the risk of odor complaints related to air conditioning systems. The main culprit is often unpleasant smells emanating from the ventilation grilles within these systems. HONU, a company based in Akasaka, Tokyo, specializing in cleaning and deodorizing hotel guest rooms, is taking significant steps to address this issue by introducing a new standard service that involves cleaning and mold prevention within these often-overlooked areas, effective from July 15, 2026.

The Importance of Air Quality in Hotels

In many hotel guest rooms, concealed air conditioning systems are popular for their aesthetic appeal. However, these systems can trap pollutants, making it difficult for standard cleaning to reach the hot spots where odors develop. Traditional cleaning practices often focus on heat exchangers, drain pans, and filters, neglecting the final air passage point—the grille. When air conditioning is turned on, the internal conditions create an environment prone to dust and moisture accumulation, leading to potential mold growth. If the grille and its interior are not addressed, odors can persist even after the main air conditioning unit is cleaned.

The Oversight in Regular Cleaning

The internal areas of air conditioning grilles can be particularly tricky to clean as they are often out of sight and require specialized knowledge to access fully. While surface cleaning might remove visible grime, it does little to eliminate hidden mold, dust, or odor sources lurking within. The lack of specialized service providers who understand the intricate connection between the main unit and the grilles leaves many hotels unaware of their need for thorough maintenance.

HONU has amassed cleaning experience from over 6,000 hotel rooms and identified many instances where simply cleaning the air conditioning unit is not enough to prevent odors.

Standardizing Thorough Cleaning Practices

Beginning July 15, 2026, HONU will offer all-in-one cleaning services that include thorough maintenance for the concealed air conditioning systems in hotels and inns. This comprehensive service encompasses:

- Full disassembly and cleaning of the concealed air conditioning unit, including the heat exchanger, drain pan, and fan areas.
- Cleaning of the grille and its interior to remove mold, dirt, and sources of odors.
- Application of mold prevention measures to the inside of the grille.
- Verification of airflow before and after cleaning to ensure effectiveness.
- Customized odor management recommendations as needed.

With this expanded scope of work, HONU aims to provide a complete solution to maintain air quality from the air conditioning unit straight through to the guest room.

Key Strategies for Odor Prevention

1. Comprehensive Review: The odor problem may not only originate from the air conditioning unit but can also emerge from the air pathways leading to the grille. It's essential to evaluate the entire airflow path for potential odor sources.
2. Mold Risk in Grilles: Areas where warm and cool air mix are prone to condensation, which can lead to mold. Cleaning only the exterior without addressing the interior can leave fragrant residues.
3. Preemptive Measures Before Peak Seasons: As air conditioners are used more frequently during extreme heat, preemptive cleaning is essential to avoid impacting room sales and customer reviews.
4. Expert Solution Provision: At HONU, our expertise in tackling odor issues through various cleaning and deodorization services enables us to provide a well-rounded approach to air quality management.

Comments from HONU's Leadership

HONU's representatives emphasize the significance of addressing air conditioning odors effectively by focusing beyond just the main unit. The potential for odors to emanate from grilles, where air transitions from the system to guest rooms, means that these areas deserve close attention. To that end, HONU is standardizing practices to include the full pathway leading to enhanced aversion of odor complaints in hospitality settings.

Looking Ahead

HONU is committed to continuing its support for hotels and inns by addressing overlooked odor sources and cleaning challenges through solutions, including air conditioning cleaning, smoking room decontamination, guest room refreshes, bathroom beautification, and anti-bacterial coatings. HONU aims to enhance room quality and minimize complaints, ensuring that guests have a pleasant experience.

Company Overview

- Name: HONU Co., Ltd.
- Address: 9-1-7 Akasaka, Minato-ku, Tokyo, 107-0052
- CEO: Kenichi Uchida
- Established: March 2008
- Services: Smoke-free room support, room refresh services, commercial air conditioning cleaning, infection control for medical facilities.
- Website: HONU Care

HONU is poised to lead the way in ensuring that the accommodations we provide are not only aesthetically pleasing but also clean and fresh, setting new standards in the hospitality industry.