Preventing Summer Allergies Indoors: Cleaning Tips to Reduce Dust, Pollen, and Mold

by Lawton Brothers | Jul 07, 2025

Summer may bring sunshine and longer days, but for many building occupants, it also brings a wave of sneezing, congestion, itchy eyes, and fatigue—all symptoms triggered or worsened by indoor allergens. While most associate allergies with the outdoors, dust, pollen, and mold can easily find their way inside and linger in carpets, air ducts, and high-touch surfaces.

At Lawton Bros, we’ve worked with schools, healthcare facilities, offices, and public buildings for over 75 years, helping teams maintain healthier indoor environments. In this post, we share practical, science-based cleaning tips to reduce allergens indoors and create safer, more comfortable spaces for everyone.

Why Summer Allergies Worsen Indoors

While outdoor allergens like pollen and mold spores spike in the summer, most buildings have multiple access points where these irritants enter and settle indoors:

Through open doors and windows
Via HVAC systems that aren’t properly filtered or maintained
Tracked in on shoes, clothes, and bags
Accumulated in carpets, upholstery, and dusty surfaces

When combined with humidity and inadequate cleaning routines, this buildup can significantly degrade indoor air quality and trigger allergic reactions for building occupants.

Cleaning Strategies to Minimize Indoor Allergens

1. Upgrade and Maintain HVAC Systems

Your HVAC system can be your first line of defense—or a major contributor to indoor allergens.

Best Practices:

Replace filters with MERV 11 or higher rated filters to capture fine particulates
Clean and inspect air vents and registers monthly
Ensure coils and drip pans are cleaned to prevent mold
Schedule routine duct inspections and cleaning

Lawton Bros Tip:
Use low-VOC coil and duct cleaners to improve airflow and reduce airborne contaminants without compromising indoor air quality.

2. Use HEPA-Filtered Vacuums and Equipment

Standard vacuums often recirculate allergens back into the air. High-efficiency particulate air (HEPA) filtration traps dust, dander, and pollen effectively.

Use HEPA equipment for:

Carpet vacuuming
Upholstery and furniture cleaning
High-dusting tasks (vents, ceiling fans, ledges)

Lawton Bros Tip:
Our line of HEPA backpack vacuums allows custodial teams to clean hard-to-reach places while minimizing airborne allergen release.

3. Damp Dust and Avoid Dry Sweeping

Dry dusting and sweeping stir up dust and allergens instead of removing them. Opt for damp methods that trap particles on contact.

Cleaning methods that work:

Use microfiber cloths dampened with water or a neutral cleaner
Damp-mop hard floors daily in high-traffic areas
Avoid feather dusters or untreated dry cloths

Lawton Bros Tip:
Microfiber systems can remove up to 99% of allergens from surfaces, especially when paired with a neutral pH cleaner.

4. Deep Clean Carpets and Upholstery

Carpets act as a reservoir for dust mites, pollen, skin flakes, and mold spores—especially during the summer when humidity is high.

Schedule regular maintenance:

Use hot water extraction or low-moisture encapsulation systems
Treat carpets with antimicrobial solutions in damp areas
Clean upholstered chairs and fabric panels quarterly

Lawton Bros Tip:
Ask about our fast-drying carpet cleaning products that reduce downtime and prevent mold growth.

5. Control Humidity to Prevent Mold Growth

High humidity encourages mold spores to grow in HVAC systems, on walls, and around restrooms or janitor closets.

Recommendations:

Maintain indoor humidity between 30% and 50%
Use dehumidifiers in basements, locker rooms, and utility areas
Clean tile and grout with EPA-registered fungicidal cleaners
Inspect windows, ceilings, and plumbing for leaks

Lawton Bros Tip:
Use our drain enzyme treatments to prevent mold growth in restrooms and kitchens, where moisture buildup is common.

6. Clean Entryways to Minimize Pollen Intrusion

Every step inside brings pollen with it—especially during peak summer bloom.

Entryway tips:

Install or replace high-performance walk-off mats
Vacuum mats and vestibules multiple times per day during high-pollen seasons
Clean entry glass, door frames, and floors daily
Keep doors and windows closed when possible

Lawton Bros Tip:
Walk-off matting can reduce tracked-in pollen and dust by up to 80%—ask us about the right size and material for your facility.

Allergy-Friendly Cleaning = Healthier Indoor Environments

Creating an allergy-safe facility is more than a comfort measure—it reduces absenteeism, increases productivity, and improves overall well-being. Whether you manage a school, hospital, office, or public space, controlling indoor allergens is a smart investment in your people.