Indoor Air Quality | Oakland & Macomb County

The short answer

Start with the complete system and the evidence

Indoor-air concerns call for a plan focused on the source, moisture, ventilation, and the air system. Sandison evaluates those conditions before recommending filtration, humidity control, or other equipment suited to the problem.

What Sandison evaluates

A practical path from symptoms to the right scope

Clear diagnostic process
Licensed multi-trade coordination
Repair and replacement options
Residential and commercial support

Start with the source and air system

Filtration, humidity, ventilation, and air cleaning address different problems

Indoor-air complaints can involve particulate load, low or high humidity, odors, moisture, outdoor-air exchange, duct leakage, pressure imbalance, occupant sensitivity, combustion concerns, or an HVAC system that cannot move air through the selected accessory. Sandison reviews the symptom, building use, filter arrangement, equipment airflow, duct and return conditions, humidity behavior, maintenance history, and source-control options before recommending an add-on. No single product removes every contaminant, and an aggressive filter can reduce performance when the blower and duct system cannot support its pressure drop.

Connected comfort planning

The useful solution may be maintenance, airflow correction, source control, or selected equipment

Sandison can coordinate filtration, humidification, dehumidification, ventilation, ultraviolet or whole-home air-cleaning products, and related HVAC corrections where the application supports them. Product selection considers installation location, electrical and control needs, replacement parts, cleaning intervals, noise, pressure drop, and the equipment's stated operating limits. The recommendation explains which concern the proposed measure is intended to address, what it cannot prove or remove, and how the owner will maintain the installed system after the first season.

Primary references

Verify the local and credential information.

U.S. EPA — improving indoor air quality

Common questions

What property owners ask

Will a stronger furnace filter solve my air-quality problem?

Filter selection needs to match the particles of concern and the airflow the equipment can support. A restrictive filter can affect system performance, while moisture, odors, and ventilation problems may need other measures.

How do I know whether I need humidity control or ventilation?

The answer depends on moisture sources, humidity behavior, outdoor-air pathways, and the affected rooms. An evaluation helps distinguish moisture correction, dehumidification or humidification, and ventilation needs.

Can one air-cleaning product address every concern?

Different products have different operating limits and maintenance requirements. The recommendation should identify the concern being addressed and explain how source control, moisture correction, airflow, and equipment choices work together.

Evidence and review

Why this page can be trusted

Service information based on Sandison’s documented trade scope and the technical references below. Contact the office to discuss the conditions at your property.

Technical lead: James Sandison, B.S. Mechanical Engineering, Oakland University. Michigan Mechanical License 7115733 · Michigan Master Plumber 8112263 · Michigan Plumbing Contractor 800-3618. Service information record: 2026-08-28.