Ex-smoker with chronic bronchitis – I cough harder in the room with the AC

Editorial guide · Updated 18 September 2026

In short: For a person with asthma or another respiratory condition, comfort settings and exposure concerns should be discussed with their clinician. A change in symptoms does not establish that the appliance is the cause. Visible dampness, mould, an unusual smell or blocked filters justify a technical inspection, separately from medical care.

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Situation discussed

Berceni, Luică street, 1977 block. I am 58, quit smoking 3 years ago, have chronic bronchitis. In summer, in the living room with the 18,000 BTU Gree (7 years old, washed once), after an hour I start coughing with phlegm. In the bedroom, no unit, less. I need cool air, but not like this. What can be done?

Editorial explanation · Revizie AC

What is really happening

For a person with asthma or another respiratory condition, comfort settings and exposure concerns should be discussed with their clinician. A change in symptoms does not establish that the appliance is the cause. Visible dampness, mould, an unusual smell or blocked filters justify a technical inspection, separately from medical care.

Two assessments with different roles — The unit and indoor environment: technical inspection, moisture, deposits and maintenance.
Symptoms and diagnosis: assessment by a medical professional.
A unit problem does not establish the cause of an illness. Maintenance does not replace medical care.

What the studies say

CDC: mould exposure can cause nasal stuffiness, wheeze, eye and skin irritation, and more severe reactions in asthmatics and allergic people. [CDC, 2024]
The 'dirty sock' or musty smell from an air conditioner comes from volatile organic compounds produced by microbial biofilm on the evaporator and blower. [Current Microbiology, 2000]
On filters of residential split units, Cladosporium (~32%), Aspergillus (~9%), Acremonium and Alternaria dominate – genera known as allergens. [Building and Environment, 2025]
The relative humidity range with the fewest adverse health effects is roughly 40–60%. [Environmental Health Perspectives / PubM, 1986]

What we do on site

Collection cover; cleaning solution with longer contact time – at 7 years with one wash, the layer is thick.
Pressure wash in place: evaporator, roller, pan, hose; repeated until the water runs clear.
Sanitising solution, extra rinse, drying on 'Fan'.
Outdoor unit, washed in place.
See current rates on the Prices page.

What you can do yourself

Sit out of the direct jet; 25–26 °C, low speed.
Hygrometer: 40–55%; good hydration thins the mucus.
Airing 10 minutes 2–3 times a day.
Filters every two weeks, 'Fan' 20 minutes before shut-off.

What NOT to do

Do not stay in the room during sanitising – take a 2-hour walk.
Do not use sprays, air fresheners, ozone – all worsen bronchitis.
Do not give up cool air – humid heat is worse for you than a clean unit.

Prevention

Plan maintenance according to the appliance manual and what is found during inspection. Keep any medical follow-up separate; cleaning does not guarantee that symptoms will resolve.

When to call us

0764 012 943, Monday–Saturday 08:00–20:00. Berceni.

Hygrometer on the nightstand in a bedroom with the clean unit

Maintenance does not replace medical care. CDC: mold and health · EPA: moisture and mould

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Sources (9)

The information on this page is educational and based on cited sources; it does not replace medical advice. We do not do repairs, installation or refrigerant circuit work.