6 Most Common HVAC Duct Problems You Should Know About

Air ducts are a significant component of your heating and cooling system, but they are usually overlooked. Many times, homeowners have no clue that a problem exists. If you think that your HVAC system is inefficient or you get consistently high energy bills, look out for these six common duct problems.

1. Poor Design

A duct system that transfers the air from one point to another with the least amount of distance and obstructions is economical and very effective. Poor design will result in inefficient heating and cooling in your home and make your energy bill skyrocket.

2. Improper Insulation

If your ducts are not correctly insulated, or not insulated at all, a lot of your money is going waste. A considerable amount of heat and air can escape this way, so it’s necessary to keep all ductwork well insulated.

3. Dirty Ducts

Dust, germs, and contaminants recirculate through your ducts, which eventually makes the air in your home much more polluted than the air outside. Cleaning the ducts regularly will improve your home’s air quality and help your system run more efficiently.

4. Inadequate Airflow (Kinks/Twists)

If you have flexible ductwork, be sure there are no kinks, twists or other obstructions restricting airflow. These kinds of ducts can even get crushed, causing significant issues with air circulation.

5. Leaking Ductwork

Loose or disconnected ductwork can cause the air to leak into open space and affect your indoor air quality too. According to the HVAC experts, the average home loses about 20-40% of the air that circulates through leaking ducts, causing major inefficiency in your HVAC system.

6. Poorly Sealed Registers and Grills

Improperly sealed registers at the duct connection cause air to escape your ducts even before reaching your rooms and also allow entry of insects, critters, and debris into your ductwork. Not only does air duct sealing impact energy efficiency, but it can also affect your unit’s lifespan.

Also Read - Ductless Heating and Cooling System: Is It Right for Your Home?

Read some of the common questions related to HVAC ductwork below.

Is Air Duct Cleaning Necessary?

You should have your ducts and HVAC system cleaned in the following scenarios:

  • Home renovation
  • Animal infestation or nesting
  • Visible mold growth
  • Noticeable contaminants or debris
  • Allergy-related illness in the family

What Kind of Ductwork Is Needed for Central Air Conditioning?

Types of ductwork needed for air conditioning are:

  • Flexible ductwork
  • Rigid ductwork (include sheet metal ducts, fiberglass lined ducts, fiberboard ducts)

How to Repair Leaks in Ductwork?

You can follow these steps to repair leaks in ductwork:

  • Turn on the HVAC fan to locate leaks by observing the ducts for drafts that indicate escaping air.
  • Turn off the fan and seal the hole or gaps by applying special metallic foil tape made for repairing ducts.
  • Use a brush to place duct mastic over the tape and joints to improve the seal.

Also Read - 5 Benefits of Installing Ductless Air Conditioners

If your HVAC system is not functioning as well as it once did, call us today to receive professional HVAC assistance in getting many of the common HVAC problems fixed.

Views: 17

Tags: acductwork, airductinstallation, airductrepair, airductscleaning, commonHVACproblems, commonductproblems, ductmaintenance, hvacairflowproblems


You need to be a member of Home Energy Pros Forum to add comments!

Join Home Energy Pros Forum

Comment by Franco Oyuela on July 23, 2019 at 2:02pm

When Duct Issues Affect the HVAC System as a Whole


• Inefficiencies
Duct issues can make it difficult for the HVAC system to regulate air. In order to properly cool or heat the building, the system has to work harder. This can create a noticeable spike in your monthly energy bills. While inefficiencies can occur as a result of many things, duct issues are one of the main culprits.

• Poor Temperature Control
Oftentimes, duct issues can affect the HVAC system’s ability to control air temperature. The building may not be as cool as you’d like it to be in the summer, or as warm in the winter. There can even be temperature variances from room-to-room, called hot and cold spots. Maybe one place in the building always feels cold, while another always feels hot and stuffy.

• Loud Noises
When everything is working correctly, the HVAC system can do its job without disturbing anyone in the building. It may make noise, but usually, it’s barely noticeable. With duct issues, however, the HVAC can become very loud. You may hear whistling sounds or popping sounds.

• Low Air Quality
One of the primary benefits of having an HVAC system is better air quality. But, when there’s a problem with the ducts, contaminants may linger in the air. The ducts are supposed to remove pollutants, such as pet dander, dust and pollen. When they fail to do so, strange odors might develop and people may start to experience negative health effects.

• Filters are Always Clogged
Does it seem like your HVAC filters are always clogged? If you constantly have to clean or replace them, there could be more to the story. Damaged ducts have been known to clog filters with particles and other debris at a faster rate.


Latest Activity

Building Performance Association posted a blog post

August Policy & Advocacy Updates

By: Lizzie Bunnen, Government Affairs Director, AnnDyl Policy Group…See More
1 hour ago
Building Performance Association commented on Emily Ambrose's blog post 6 Building Conferences We’re Attending
"Great picks! Thanks for including us!"
1 hour ago
Building Performance Association liked Emily Ambrose's blog post 6 Building Conferences We’re Attending
1 hour ago
Diane Chojnowski's 2 videos were featured
5 hours ago
Brad Cook replied to Chris Stratton's discussion Okay to use 1" polyiso as a insulation base for 50 gallon heat pump water heater?
"Not all insulation is the same. For example, Dow's Super Tuf-R polyiso has a compression…"
6 hours ago
David Butler replied to David Wentling's discussion ERV recommendations
"@Luke, since you work for a well-known ERV manufacturer, I'm curious if you have access to…"
14 hours ago
Luke Langhals replied to David Wentling's discussion ERV recommendations
"Hello David -- Do you have an expected air tightness? What type of blower door test results are you…"
16 hours ago
Brad Cook replied to David Wentling's discussion ERV recommendations
"Many ERVs, particularly those with enthalpic wheels, use only ONE motor to run two fans. The In/Out…"
18 hours ago

© 2019   Created by Building Performance Association   Powered by

Badges  |  Report an Issue  |  Terms of Service