Frequently Asked Questions (FAQs)

Dirty air ducts have been identified as a major source of indoor air pollution. Your air duct system is an ideal breeding ground for bacteria, mold, mildew, fungi, and other health threatening organisms. Dust mites don’t typically live and breed in the ducts themselves. However, dirty air ducts distribute the primary food source for dust mites — dust.
Yes, the inside of your duct work is the equivalent of an extra room in your home that never gets dusted or vacuumed. When the furnace or air conditioner fan turns on, dust from the duct work gets churned up and blown into the rooms of your home.
Many people are allergic to dust mite waste. Dust mites feed on debris found in duct work. Remove the debris and you remove their food. Also, by greatly reducing particulate debris in your ducts, there are less dust particles and potential allergens in the air to aggravate those with respiratory illnesses.
Absolutely! Up to 50% of air duct system cleaning is done in homes that are less than five years old. During construction, the ductwork is wide open and the air handler is running many times without a filter. During this time, construction debris such as pieces of plaster, drywall, wood, dust, insects and insulation, are accumulated in the duct work.
By using the Video Inspection unit, our technicians can show you how dirty your system is. It can also show you the “before” and “after” of your duct cleaning, so you know that it’s a job well done.
The equipment we use to clean the air ducts is effective in all types of air duct construction, including flex duct, round metal ducts, square metal ducts, and fiberboard. It can easily accommodate right angle turns and multiple bends found in most types of duct systems.
Yes, by having your dryer vent professionally cleaned, your clothes dryer will run more efficiently. Your dryer will not have to run as long, lessening the wear and tear on your dryer, reducing your need for repair and lengthening the life of your dryer.
Although a homeowner can clean dryer vents, it is advised that you consult a professional. Most homeowners don’t have the special equipment required to do a thorough job. A professional has special tools such as video inspection equipment to give a visual of the hard-to-reach areas of the dryer vent system.
Using the following as a checklist, you can get a good idea if your dryer vent is in need of cleaning:

  • Loads of clothing are taking longer to dry.
  • Clothing is very hot and still damp when dryer finishes (especially heavy items especially, such as towels).
  • The dryer itself feels hotter.
  • There may be no lint on the lint screen (i.e. the exhaust system is clogged).

Reliable answers to the most common heating, cooling, boiler, and water‑heater questions from homeowners across Chicago and the surrounding suburbs.

General HVAC Questions

What services does D’s Air & Heating provide? We offer furnace repair, AC repair, boiler systems, water heaters, installations, maintenance, and emergency HVAC service for residential customers.

Do you offer emergency or same‑day service? Yes. We provide fast response for urgent heating and cooling issues, especially during extreme Chicago weather.

What areas do you serve? We proudly serve Chicago, Oak Lawn, Evergreen Park, Burbank, Alsip, and surrounding communities.

Are your technicians licensed and insured? Yes. Our team is fully licensed, insured, and trained to work on all major HVAC brands and systems.

Heating (Furnace) FAQs

Why is my furnace blowing cold air? This can be caused by clogged filters, overheating, ignition problems, or airflow issues. A diagnostic visit will identify the exact cause.

How often should I service my furnace? We recommend annual maintenance before winter to ensure efficiency and prevent breakdowns.

Should I repair or replace my furnace? If your furnace is 12–15 years old or requires frequent repairs, replacement may be more cost‑effective.

What furnace brands do you work on? We service all major brands including Lennox, Carrier, Goodman, Rheem, and more.

Cooling (Air Conditioning) FAQs

Why is my AC not cooling properly? Low refrigerant, dirty coils, clogged filters, or electrical issues are common causes.

How long does an AC unit last? Most AC systems last 10–15 years depending on maintenance and usage.

Do you offer AC tune‑ups? Yes. Seasonal tune‑ups improve efficiency, reduce breakdowns, and extend system life.

Can you help with AC replacement? Absolutely. We provide recommendations, installation, and financing options for new AC systems.

Boiler & Water Heater FAQs

Why is my boiler making noise? Banging or whistling often comes from air in the system, mineral buildup, or failing components.

How often should boilers be serviced? Boilers should be serviced annually for safety and efficiency.

Why am I running out of hot water? Sediment buildup, undersized tanks, or failing components can reduce hot‑water supply.

Do you install tankless water heaters? Yes. We install both traditional tank systems and high‑efficiency tankless units.

Service & Appointment FAQs

How long does a typical service appointment take? Most diagnostics take 30–60 minutes. Repair time varies depending on the issue.

Do I need to be home during service? Yes. A homeowner or authorized adult must be present during the appointment.

What should I expect during a diagnostic visit? Your technician will inspect the system, identify the issue, and provide repair options with upfront pricing.

Do you offer financing? Yes. Financing is available for new installations and major repairs.

Pricing & Warranty FAQs

How much do repairs cost? Pricing depends on the issue, parts, and labor. We provide upfront estimates before any work begins.

Do you offer warranties? Yes. We offer manufacturer warranties on new equipment and workmanship guarantees on repairs.

Are estimates free? We offer free estimates for new installations. Diagnostic fees apply for repair visits.

Need Help? Contact Us Anytime

Have a question that isn’t listed here? Call us at 773-940-0965 or request service online — our team is here to help.