How to Improve Indoor Air Quality Without Buying a New System

Not every indoor air quality improvement requires professional equipment installation. Many Treasure Valley homeowners can make meaningful improvements to their home's air quality through straightforward, low-cost steps. At Ashley Heating Air and Water, we believe in practical, effective guidance — here are the most impactful things you can do on your own, along with a clear-eyed view of where professional solutions provide the most benefit.

Start with Your Filter

The simplest IAQ improvement available to every homeowner is a better filter, changed regularly. If you're currently using a basic fiberglass filter (the cheap blue ones), switching to a MERV 8 to 13 pleated filter provides dramatically better particle capture for just a few dollars more per filter change.

For most Treasure Valley homes, check your filter monthly during both heating and cooling seasons and replace when it shows visible accumulation. During high-pollen spring weeks or wildfire smoke events, weekly checks are appropriate. A clean filter also allows your HVAC system to operate more efficiently, reducing energy costs.

Control Moisture and Humidity

Maintaining indoor relative humidity between 30 and 50 percent is one of the highest-impact IAQ steps a homeowner can take. Above 50 percent, mold and dust mites thrive — both are powerful allergens. Below 30 percent (common in Treasure Valley homes during winter), respiratory irritation increases and wood furniture and flooring can be damaged.

Use bathroom exhaust fans during and for 20 minutes after showering. Vent kitchen exhaust directly outside, not just to a filter loop. Check under sinks and near water heaters periodically for drips or moisture accumulation. Consider a whole-home humidifier (for winter) or dehumidifier (for summer) if your humidity consistently falls outside the healthy range.

Increase Ventilation Strategically

Fresh outdoor air dilutes indoor pollutants — but during wildfire smoke events or high-pollen days, opening windows does more harm than good. A practical approach for Treasure Valley homeowners: ventilate aggressively (open windows, run fans) during clean-air periods like clear early mornings after smoke events clear or during low-pollen seasons. On smoke days or high-pollen days, keep windows and doors closed and rely on your HVAC filtration.

If your home feels perpetually stuffy, energy recovery ventilators (ERVs) or heat recovery ventilators (HRVs) provide controlled fresh air exchange while recovering most of the heating or cooling energy from outgoing air — a more sophisticated solution Ashley can discuss.

Reduce Sources of Indoor Pollution

Identifying and reducing pollution sources is more effective than filtering after the fact:

Choose low-VOC paints, adhesives, and cleaning products. The VOC content is listed on product labels.

Air out new furniture and rugs before bringing them inside. New materials off-gas most heavily in the first few weeks.

Groom pets regularly to reduce dander load. Designate pet-free zones — particularly sleeping areas — for the most sensitive family members.

Don't smoke indoors. Cigarette, cigar, and cannabis smoke are among the most harmful indoor air quality contributors.

Don't idle vehicles in attached garages. Combustion byproducts can infiltrate the living space through walls and mechanical penetrations.

When DIY Steps Aren't Enough

For homeowners with serious respiratory conditions, significant allergy burdens, wildfire smoke exposure, or specific concerns about pathogens, the DIY steps above are important but may be insufficient. This is where Ashley Heating Air and Water's professional IAQ solutions — the Aerus Air Scrubber, Active Gold Air Purifier, Electronic Air Cleaner, and professional duct cleaning — provide the next level of protection.

Call Ashley Heating Air and Water at 208-378-9445 or visit ashleyheating.com to discuss a comprehensive indoor air quality approach for your Treasure Valley home.