Understanding Indoor Air Quality in Your Home

What Is Indoor Air Quality?

Indoor air quality (IAQ) refers to the condition of the air inside your home. It includes factors like temperature, humidity, and the presence of pollutants such as volatile organic compounds (VOCs), dust, and allergens.

Most people spend the majority of their time indoors. The air you breathe at home directly affects your comfort, your health, and even the condition of your home itself. Poor indoor air quality can cause headaches, fatigue, irritated eyes and throat, and aggravate allergies or asthma. Over time, it can also damage wood floors, paint, and furnishings.

The good news: understanding what affects your air quality is the first step toward improving it. And with Shipshape monitoring your home, you do not have to guess.

Why Indoor Air Can Be Worse Than Outdoor Air

However often you clean, the air inside your home can carry dust, pet dander, pollen, fabric fibers, chemical fumes, and viruses. According to the EPA, Americans spend about 90% of their time indoors, where the concentrations of some pollutants are often 2 to 5 times higher than typical outdoor levels (EPA: Indoor Air Quality).

Serious Indoor Air Hazards

Everyday particles like dust, dander, and pollen can aggravate allergies and asthma, but they are usually manageable. Some airborne hazards are far more serious and need their own testing or professional help:

• Mold — see Mold Prevention and What to Do If You Find It
• Radon — see Radon Testing & Mitigation
• Carbon monoxide — see Carbon Monoxide Detection & Safety
• Lead particles — see Lead Paint Safety & Management
• Asbestos — see Asbestos Identification & Management
• Secondhand smoke

Signs of Poor Indoor Air Quality

Some signs show up in the house itself:

• uneven temperatures or humidity from room to room;
• stuffy rooms with poor air circulation;
• odd or lingering odors;
• dust that builds up quickly, or visible mildew or mold.

Others show up in how you feel: irritated or dry eyes, nose, throat, or skin; headaches; dizziness; fatigue; sneezing or shortness of breath, especially for people with allergies or asthma. If the symptoms ease when you are away from home, the EPA advises looking for a cause in your indoor air.

What Shipshape Monitors

Shipshape tracks several key indicators of indoor air quality through its snap-on sensors:

• Temperature — Is your home too hot or too cold? Consistent temperature helps both comfort and energy efficiency.
• Humidity — Too much moisture encourages mold. Too little causes dry skin and damage to wood. Shipshape tracks relative humidity continuously.
• VOCs (with compatible sensors) — Volatile organic compounds are chemicals released by household products, paints, cleaning supplies, and building materials. Elevated VOC levels can irritate your respiratory system.

SAM watches these readings around the clock and alerts you when any value moves outside of a healthy range.

Healthy Ranges to Know

Here are the recommended indoor ranges for the key air quality metrics:

These are general guidelines. Your ideal settings may vary based on personal comfort, health conditions, and the time of year.

Common Sources of Poor Indoor Air Quality

You might be surprised at how many everyday activities and items can affect your air:

Cooking and Cleaning

• Gas stoves release nitrogen dioxide and carbon monoxide
• Frying and high-heat cooking produce particulates
• Many cleaning products release VOCs, especially sprays and aerosols

Household Materials

• New furniture, carpeting, and cabinetry can off-gas formaldehyde and other VOCs for weeks or months after installation
• Fresh paint releases chemicals as it dries and cures
• Pressed wood products (plywood, particleboard) are common off-gassing sources
• Gasoline, solvents, and other chemicals stored in the house or an attached garage release fumes

Biological Sources

• Pet dander and hair circulate through your HVAC system
• Dust mites thrive in humid environments
• Mold and mildew release spores when humidity stays high

Ventilation Issues

• Tightly sealed homes trap pollutants inside
• Blocked or dirty air returns reduce airflow
• Running exhaust fans infrequently allows moisture and odors to linger

How Shipshape Helps

Shipshape gives you visibility into your home's air quality that you would never have otherwise:

Continuous Tracking

Your sensors take readings throughout the day and night. Instead of a single snapshot, you get a complete picture of how conditions change over time.

SAM Alerts

When humidity stays high long enough to matter, SAM sends you a clear notification explaining what happened, why it matters, and what you can do about it. For example:

"Humidity in your basement has stayed at 70% or higher for the past 4 hours. Sustained high humidity increases mold risk. Consider running your dehumidifier or checking your HVAC settings."

Pattern Detection

SAM's historical data helps you identify patterns you would never notice on your own. For example:

• Humidity spikes every evening when you cook
• Temperature swings that suggest your HVAC is cycling too frequently
• VOC levels that rise after cleaning day

Once you see the pattern, you can take targeted action.

Home Health Score Impact

Indoor air quality factors into your overall Home Health Score. Keeping your readings in the healthy range contributes to a higher score, which reflects a well-maintained home.

Simple Tips to Improve Your Air Quality

You do not need expensive equipment to make a difference. Start with these practical steps:

Ventilation

1. Open windows when weather permits, even for 15 minutes
2. Run exhaust fans in the kitchen while cooking and in bathrooms during and after showers
3. Check your air returns to make sure furniture or curtains are not blocking them

HVAC Maintenance

1. Change your HVAC filter every 1-3 months (SAM can remind you)
2. Schedule annual HVAC tune-ups to keep the system running efficiently
3. Consider upgrading to a HEPA or high-MERV filter if allergies are a concern

Humidity Control

1. Use a dehumidifier in damp areas like basements and crawl spaces, and run your air conditioner in humid weather (it removes moisture as it cools)
2. Use a humidifier in winter if indoor humidity drops below 30%
3. Fix leaks promptly to prevent moisture buildup

Reducing Pollutants

1. Choose low-VOC or no-VOC paints and finishes when renovating
2. Ventilate well when using cleaning products, especially sprays
3. Let new furniture air out in a well-ventilated area before moving it to bedrooms
4. Consider an air purifier with a HEPA filter for rooms where allergy sufferers spend the most time

Find the Source First

Before buying equipment, look for what is causing the problem: new furniture, fresh paint, cleaning chemicals, stored gasoline, a gas stove, or mold. The EPA calls removing or reducing the source usually the most effective way to improve indoor air.

Getting a Professional Air Quality Inspection

If you can't find the source, or symptoms continue, hire an indoor air quality (IAQ) professional to inspect your home. They can test for pollutants you can't see or smell and tell you what to fix. The Indoor Air Quality Association lists professionals near you: IAQA Find a Pro.

Seasonal Considerations

Your air quality challenges change with the seasons:

Winter

• Heating systems dry out indoor air, often dropping humidity below 30%
• Homes are sealed tighter, trapping pollutants
• Holiday candles and fireplace use add particulates
• See the Low Humidity article for winter-specific guidance

Spring

• Pollen infiltrates through open windows and on clothing
• Spring cleaning products can spike VOC levels temporarily
• Rising outdoor humidity can push indoor levels higher

Summer

• High outdoor humidity can overwhelm natural ventilation
• Air conditioning helps control humidity but can mask ventilation issues
• Running HVAC harder means filters get dirty faster

Fall

• Leaf mold and outdoor allergens increase
• Transitioning between cooling and heating can create temperature swings
• A good time to schedule HVAC maintenance before winter

When to Take Action

Not every alert requires immediate action. Here is a simple guide:

• Temperature outside 68-76°F — Adjust your thermostat or check that your HVAC is running properly
• Humidity above 55% for more than a few hours — Run a dehumidifier, check for leaks, improve ventilation
• Humidity below 25% — Run a humidifier, check HVAC humidifier settings
• VOCs above 500 ppb — Ventilate the area, identify the source, consider an air purifier
• Persistent issues — If SAM alerts you repeatedly about the same condition, it may be time to call your service professional for a deeper assessment

Related Resources

• Low Humidity: What It Means and What to Do
• Mold Prevention and What to Do If You Find It
• SAM, Your AI Home Assistant
• Sensor Placement Guide