-
A Most people find ~40–50% RH comfortable; staying within the EPA‑recommended 30–50% helps comfort and reduces allergens.
-
A Yes—controlling RH (30–50%) curbs dust mites and mold; combine with good filtration and source control for best results.
-
A Keep RH roughly 30–50% (below 60% maximum). In winter, 30–45% is typical; in summer, 40–50% helps comfort and mold control.
-
A Yes—any fuel‑burning appliance warrants properly placed CO alarms per manufacturer and local code guidance.
-
A A heat pump paired with a gas furnace; controls select the most efficient or comfortable heat source depending on outdoor temperature.
-
A Causes include dirty filters, thermostat placement, oversized equipment, or safety lockouts. A professional should diagnose to prevent damage.
-
A Yes—modern cold‑climate heat pumps operate efficiently at and below 32°F; performance depends on model selection, sizing, and installation quality.
-
A Consider replacement if your furnace/boiler is 15+ years old, needs frequent repairs, or energy bills are rising compared with similar homes.
-
A Change filters, keep returns clear, verify combustion/venting on gas appliances, clean coils on heat pumps, seal/insulate ducts, and schedule annual service.
-
A Duct thermal expansion is common, but delayed ignition or gas/air issues can be hazardous. Shut down and call a professional if noises are sharp or new.
