Establish a useful baseline
Use an indoor humidity meter and record readings in the rooms you use, along with the outdoor weather and heating operation. EPA recommends keeping humidity below 60 percent, ideally between 30 and 50 percent. That guidance does not mean every home can hold the same target in cold weather without moisture problems. EPA moisture guidance.
Note window condensation, damp surfaces, and any moisture damage. Ask the provider to consider the building's conditions before selecting a humidifier target. Do not keep increasing humidity to chase comfort while condensation is developing.
For dust, list the rooms affected and sources such as renovation, pets, workshop use, or open-door conditions. Record the furnace filter type, condition, and replacement history. Photographs and a brief pattern log are more useful than calling the entire house dirty.
Choose the first correction from the findings
Start with a clear, practical source correction where one is identified. Have the HVAC provider check filter fit and system compatibility before suggesting a different filter or added air-cleaning device. Ask what particles the proposed device addresses and what it cannot address.
If measured humidity remains low and is a separate concern, discuss an appropriate humidification option, its controls, water requirements, upkeep, and effect on the home. Have any required household plumbing or electrical work assigned to the appropriate qualified provider.
Compare complete ownership
Request separate prices and maintenance plans for filtration and humidification so you can choose deliberately. An installed device that is poorly matched or difficult to maintain is not a useful shortcut.
Your next step is to bring humidity readings, dust observations, and filter information to an HVAC assessment. Ask for a ranked plan showing the first correction, the evidence behind it, and when to evaluate the result before adding more equipment.