HVAC IAQ Add-On Services Reference

Why this reference exists

Indoor Air Quality (IAQ) add-ons are the highest-margin upsells at HVAC service visits. Customer pays a meaningful ticket for an add-on that the tech installs in 30-90 minutes. Common opportunities: UV lights, advanced filtration, humidifier, dehumidifier, fresh-air ventilation, air cleaner. This reference is the working framework for selling + installing.

Why IAQ matters

Indoor air quality is 5-10x worse than outdoor:

• VOCs (paint, cleaners, furniture, carpet off-gas)
• Combustion products (gas appliances, fireplace)
• Cooking ultrafines (NO2, PM2.5)
• Biological (mold spores, dust mites, pet dander)
• Outdoor pollution drawn in through ventilation
• Radon (regional)

Customer symptoms: allergy flares, asthma, headaches, fatigue, dry skin, sore throats.

For HVAC tech: identify cause + recommend solution. Multiple solutions stack.

Standard add-on options

Whole-house humidifier

Bypass humidifier (most common):

• Mounts to supply or return duct
• Bypass air through wet evaporator pad
• Adds moisture to dry winter air
• The lower-cost humidifier option to install
• 5-7 gallon/day capacity

Steam humidifier (premium):

• Boils water; produces sterile steam
• Mounts to duct
• Higher capacity (8-15 gal/day)
• Roughly double the bypass unit's install cost
• Better humidity control + no risk of stagnant water

When to recommend: customer with very dry winter air, frequent static, dry skin/lips, wood floor cracking, sick from dry air.

Target indoor humidity: 35-50% (winter) / 40-55% (summer).

Whole-house dehumidifier (covered in separate reference)

• The priciest IAQ add-on in this lineup to install
• 70-130 pints/day
• Customer with high indoor humidity (above 60%)

UV-C light

• Mount in duct or evaporator coil
• Kills mold + bacteria
• 5,000-15,000 hour bulb life
• A modest install cost plus a small annual bulb-replacement fee

When to recommend: musty smell, frequent allergies, asthma, mold-sensitive customer.

Air purifier / advanced filtration

HEPA filter (whole-house):

• In bypass duct
• True HEPA: 99.97% of 0.3-micron particles
• The priciest filtration option here to install
• Highest filtration; expensive to operate (high static)

MERV 13-16 in 4-5" media filter housing:

• Lower cost, simpler
• A fraction of the HEPA install cost to retrofit (housing) + media filters
• Covered in MERV Reference

Electronic air cleaner (EAC):

• Electrostatic plates
• MERV 13-14 equivalent
• Plates washable
• Mid-range install cost, below HEPA

Active polarized media (PCO, PHI, bipolar):

• Active disinfection + filtration
• Comparable install cost to the EAC, wide range depending on product tier
• Claims aggressive on pathogens (verify per product)

When to recommend: allergy customer, asthma, post-COVID awareness.

Fresh air ventilation (ERV/HRV - covered separately)

• Among the pricier IAQ add-ons to install, comparable to a whole-house dehumidifier
• Required in tight modern homes
• IAQ + comfort

Whole-house air purifier (active)

• iWave, REME HALO (controversial; verify claims)
• A mid-tier install cost, below the ERV/HRV
• Customer marketing-driven; claims vary

Sales conversation framework

Step 1: Listen at service call

Customer says:

• "I keep getting sick"
• "Allergies are killing me"
• "The air is so dry"
• "I smell something funny when AC runs"
• "Dust is everywhere"

Step 2: Diagnose

Run air quality monitor (a basic retail unit or a pricier pro-grade model):

• PM2.5 (particulates)
• CO2 (ventilation)
• VOCs
• Humidity
• Temperature

Numeric reading reveals specific issue + customer SEES the problem.

Step 3: Recommend specific solution

Step 4: Quote

Single fix: a standalone add-on install.

Comprehensive IAQ package: several times the cost of a single fix (multiple add-ons bundled).

Step 5: Customer messaging

"Numbers show [X]. Recommendation [Y]. Total cost [Z]. Operating cost minimal."

Show the air quality monitor reading + the customer is convinced.

Common pitfalls

• Selling without measurement: customer doesn't believe
• Wrong solution for problem: HEPA for low-humidity = no improvement
• No follow-up measurement: customer doesn't see results
• Marketing claims that don't match data: customer disappointed
• Improper install: filter housing leaking; UV light not exposed; humidifier dripping
• No maintenance plan: filter clogs in 6 months; UV bulb dies in 12

Service contracts

IAQ adds drive recurring service:

• Filter replacement: every 6-12 months (a low per-filter cost)
• UV bulb replacement: annually (a modest fee)
• Humidifier pad: annually
• Annual IAQ checkup with monitor reading

Annual contract: a modest per-home fee. Easy add-on at sale.

When NOT to recommend

Some IAQ situations require different scope:

• Severe mold problem: mold remediation specialist (IICRC AMRT certified)
• Radon: radon mitigation specialist
• Sewer gas: plumber
• Wood smoke / fireplace: chimney sweep

Don't try to solve everything with HVAC add-ons.

Brand pitfalls

Some IAQ products have unproven or controversial claims:

• Ionizer-style devices: claim to "polarize" air; mixed scientific evidence
• Ozone generators: harmful; banned in occupied spaces
• Some COVID-era products: marketing outran science

Stick to mainstream brands (Aprilaire, Honeywell Trion, Carrier, Trane, Lennox, Bryant) with documented test data + lab-verified performance.

Customer education

Provide:

• Why IAQ matters (5-10x indoor vs outdoor)
• What each device does
• Maintenance schedule
• Annual service contract
• Air quality monitor (leave one if buying multiple add-ons)

Educated customer stays + refers.

Customer talking points

For service call observation:

1. "Numbers show [reading]. Above healthy threshold."
2. "Caused by [identified problem]."
3. "Solution: [device] + monthly maintenance"
4. "Cost: $X install, $Y/year maintenance, $Z financing available"
5. "Health benefit: clearer headaches, better sleep, less allergy"

For health-driven customer:

1. "Customer with [condition]: studies show [improvement]"
2. "Many doctors recommend IAQ improvements"
3. "Insurance + HSA sometimes covers this scope"

References

• ASHRAE 62.2 + 62.1 Ventilation
• EPA Indoor Air Quality Guidance
• Manufacturer test data (Aprilaire, Honeywell, Trane, Carrier)
• AHAM HEPA filtration standards
• Manuall internal: Whole-House Dehumidification Reference