IAQ Package Picker: Finding the Right Indoor Air Quality Solution for Your North Shore Home

Basic package when

You have a standard 1-inch filter slot, no respiratory health concerns, and want to reduce dust and allergen load. A MERV 11–13 4-inch media cabinet upgrade is the right starting point.

Mid-tier package when

Household members have asthma, allergies, or post-COVID respiratory sensitivity. Combine a media filter with in-duct UV purification to address both particulates and biological contaminants.

Premium package when

You have multiple IAQ concerns: allergens, biological contaminants, VOCs (from new construction or renovation), and humidity control. A premium package may include bipolar ionization, UV, whole-house ERV/HRV, and humidity control working together.

Option A: Basic — 4-inch media cabinet filter upgrade

Replace the standard 1-inch filter with a 4-inch MERV 11–13 media cabinet. Captures 80–95% of particles 1–3 microns (dust, pollen, pet dander). Does not increase airflow resistance meaningfully (unlike MERV 16 filters in standard systems). Installed cost: $400–$700. Filter media replacement every 6–12 months. The highest ROI single IAQ upgrade.

Option B: Mid-tier — media filter + in-duct UV

Combines the particulate capture of a media cabinet with germicidal UV-C irradiation at the air handler coil. UV disrupts the DNA of mold, bacteria, and viruses as air passes the coil. Installed cost: $800–$1,400 for the combined system. Good choice for households with respiratory conditions or recurring coil mold issues.

Option C: Premium — bipolar ionization + UV + ERV + humidity control

Bipolar ionization (Daikin-compatible or whole-duct ionization bar) generates ions that cluster airborne particles and neutralize VOCs. An ERV (energy recovery ventilator) exchanges stale indoor air with fresh outdoor air while recovering energy. Whole-house humidification and/or dehumidification maintains 40–60% RH year-round. This is a systems-level IAQ approach for North Shore homes with complex needs. Installed cost: $2,500–$6,000+ depending on components.

Option D: Custom assessment

Legendary offers an IAQ walkthrough — carbon dioxide monitoring, humidity measurement, filter inspection, and coil assessment — before recommending any package. No equipment sold on the first visit without a clear diagnosis.

Installing high-MERV filters on systems not designed for them

MERV 16 filters in a standard residential system can restrict airflow enough to freeze the evaporator coil and damage the blower. Media cabinets are designed with the correct face velocity for high MERV filtration.

UV lights without filter upgrade

UV lights do not remove particulates. Installing UV without addressing filtration means you're addressing only biological contaminants while dust and allergen load remains high.

Ignoring humidity

Neither filters nor UV control indoor humidity. North Shore winters drive indoor RH below 30% — causing static, dry skin, and wood damage. Summer can bring 60%+ RH — mold risk. Humidity control is a separate system.

Questions homeowners ask

What MERV rating do I need for my home?

MERV 11–13 in a 4-inch media cabinet is the right balance for most North Shore homes — captures allergens, dust mite debris, and mold spores without the airflow restriction of higher ratings in standard duct systems.

Does Legendary sell and install all IAQ components?

Yes. Legendary installs media cabinets, UV systems, bipolar ionization, ERVs, whole-house humidifiers, and dehumidifiers. All work is flat-rate priced before installation begins.

How often do IAQ system components need service?

Media filters: every 6–12 months. UV bulbs: every 1–2 years (output degrades before failure). Ionization cells: typically every 2 years. ERV cores: cleaned annually. Legendary maintenance agreements cover all of these.