How to increase airflow to one room: a step-by-step guide

If the correct air circulation is maintained in the room, then it is possible to maintain the optimum temperature and humidity, comfortable for life. However, the ventilation in the rooms often deteriorates. Therefore, the question arises, how to increase airflow to one room? More about improving indoor air quality, you can read in the article.

How to increase airflow to one room: a step-by-step guide

Methods for increasing airflow

Quite often, people wonder how to increase airflow in one room. The greatest temperature difference is noticeable in summer. Because of this, being in the room is not very comfortable. If you want to avoid hotspots and improve airflow, there are a few methods that I will discuss below.

Enlargement of ventilation holes

Almost all HVAC systems are equipped with ventilation holes and ducts. Air vents are a combination of metal pipes that run from the main HVAC unit through the entire home.

How to increase airflow to one room: a step-by-step guide

These openings are designed to ensure that the conditioned air moves in the correct direction.

Not-conditioned air is supplied back to the HVAC unit. In the vents, the ducts will open towards the room.

The inflow holes suck air from the room, after which it is heated or cooled.

The return vents let air into the room, and it is temperature controlled. If you increase the size of the ventilation holes, you do not change the air pressure that is in the duct. If you increase the area on the front side, the air moves strongly.

Then you can increase airflow. Due to the low speed, the noise from the system is reduced. Yes, increasing the size of the air vents helps increase airflow. However, you should not do this on your own.

First, the work is expensive. Secondly, the increase is carried out by drilling.

Checking ventilation openings and registers

First, you need to make sure that all parts of the system are not contaminated. If they are blocked by furniture, they must be moved. Registers must be kept open at all times. This will maximize airflow.

In special cases, the draft of the ventilation openings can be increased. To increase the draft, a deflector is installed on top of the ventilation duct. This device captures the wind and cuts it into several air currents at different speeds.

However, this must be done carefully, because the pressure in the duct may increase. Because of this, fresh air penetrates other rooms with problems.

Air duct inspection

These parts contribute to the distribution of the conditioned air. If there is a malfunction, the air is blocked. It is useful to pay attention to several issues, in particular:

  1. Clogged air ducts. Almost all garbage remains in the filters. Therefore, dirt and dust can accumulate inside. Because of this, the airflow decreases. That is why you need to constantly clean the air ducts.
  2. Leaks. If air leaks, the system loses some pressure. Because of this, the airflow drops. In this case, the conditioned air comes out. Because of this, energy costs increase, because the heating and cooling systems will work in enhanced mode.
  3. If the air ducts are large or small, airflow problems may occur. Small sizes cannot move the volume of air. If the dimensions are large, then part of the airflow will be lost, because there will not be enough pressure.

Cleaning filters

Almost all equipment that forms an HVAC system is distinguished by the presence of built-in filters.

How to increase airflow to one room: a step-by-step guide

Of these, it should be noted an air filter, a stove, and an air conditioner. The air that moves around the room must pass through such filters. They accumulate dust and dirt.

Because of this, the airflow is limited. If you clean or change the filters, the airflow returns to normal. In this case, the airflow rate increases.

Filters are distinguished by their high cost and clear functions. They can clean the air of most pollutants.

This prevents allergies and helps improve airflow in the room. It is important to ensure that the HVAC system has all the necessary filters.

Find the right balance between filters. Thanks to this, contaminants are removed, and the system does not be overloaded.

Fan speed control

To increase the airflow, you should change the settings according to which the fan or air conditioner operates. You may have to change the fan speed with the help of a thermostat.

How to increase airflow to one room: a step-by-step guide

Often you have to work manually.

But, it is best to have a technician do the work. This prevents damage to the heating and cooling system and its connections.

HVAC design change

If you have changed your home layout, or are undergoing a major renovation, a redesign of the HVAC system is required.

After all, the HVAC design that is currently in place will not keep records of excess air conditioning if an additional room has been created. Because of this, the airflow rate is reduced.

Increasing the number of ventilation holes

You can increase the number of ventilation holes. This helps increase airflow. You can call an HVAC specialist who will evaluate the system and install new openings.

If the planned ventilation openings change the pressure buildup, the airflow will deteriorate as a result.

Covering ventilation holes in other rooms

If you do this, you can increase the pressure in the duct. When the air pressure increases, the flow rate increases, because of this, open holes will pass air faster. Because of this, the airflow increases.

However, remember that you need to close only part of the holes. And you should not block them for a long time.

If the pressure increases due to blockage of the holes in the system, leaks can form, so expensive repairs are required.

Closing the holes increases the load on the HVAC system, so you need to call a master who will carry out all the settings to your preference.

Installing fans

If you install a ceiling fan, you can economically increase the air flow in the room.

Yes, such devices do not contribute to the production of cold air. However, the cool air will be because of the wind.

The downside of this solution is that the workspace is limited.

Therefore, the normalization of the air flow will occur only in the area where the ceiling fan enters. Due to improper installation of furniture, the effectiveness of the method will decrease.

Opening windows and doors

If you open windows and doors, you can correctly distribute the airflow. The method is more efficient than a fan. This is achieved through cross-ventilation. Therefore, it is better to open windows and doors that are on opposite sides.

How to increase airflow to one room: a step-by-step guide

You can apply the difference in air density if it is hot and cold air here. To do this, it makes sense to open the upper and lower windows. Warm air rises up and out. Cold air will enter through the bottom window.

It is not difficult to implement such a method. After all, you do not have to make holes in the walls or install fans.

Maintaining HVAC system health

If you clean the air filters, the airflow will improve. After all, air will pass through them. If the filters are dirty, the airflow is restricted, so the air circulation is bad.

Improving airflow is achieved by eliminating all blockages. It is better to call a specialist who will inspect the air ducts for leaks and make repairs.

You need to check that the ventilation holes are free from blockages, including furniture and household appliances.

You can ask a specialist to slightly reduce the fan speed in the air conditioner. If the speed is increased, the airflow is optimized. If you set the air conditioner to fan mode, the air circulation during the day will be normal. If you set up an HVAC unit, then the airflow will improve throughout the house.

Why are some holes not blowing air out?

If there is no air conditioning in the room, it is difficult to stay in this room, especially in summer. Often, ventilation holes are not able to pass air for several reasons. We will talk about them further.

Bending the duct

You need to understand that the systems are supplemented by flexible ducts. Therefore, they often change position and tear. Especially when something heavy falls on them. If installed incorrectly, they begin to bend and hang. If a bend is formed, the air will pass much worse.

Disconnecting air ducts

The air duct that goes into the room can be disconnected from the main network, so the air gets into the room worse. Heavy objects exert pressure on it.

Air leak

Often the air duct has leaks. Statistics prove that almost 75% of homes have leaks. It is better to call the master, who, using infrared equipment, will detect gaps in the duct. Diagnostics can be carried out if you notice that you have to spend more on heating and cooling.

Closing damper

The dampers in the HVAC system are responsible for regulating the airflow. If they are closed, then it blocks the air.

The importance of proper airflow

The house must have proper ventilation. If you increase the airflow, no viruses and bacteria can harm you. However, several other advantages should be noted, which will be discussed below.

How to increase airflow to one room: a step-by-step guide

HVAC life extension

As you know, HVAC systems operate within a certain airflow range. If all proportions are correctly observed, the equipment will last longer. You can prevent premature failure of parts, including the engine and compressor. This prevents the cracking of the heat exchanger.

Improving equipment efficiency

For an HVAC system to work best, it will need sufficient airflow. It moves circularly and moves into the room and back into the system. Therefore, the system will work more efficiently.


If the air circulation is proper, the house will be cleared of dust, pollen, and other substances that provoke allergies. Otherwise, respiratory infections may develop. The ventilation system must work if you use a fuel-powered appliance. This prevents carbon monoxide poisoning.

Reducing the risk of condensation

If the airflow is strong, you can prevent the house from excess moisture. Otherwise, structures made of the wood begin to rot. If the structure rots, then the integrity of the house will remain in question.

To prevent the formation of mold and mildew, it is very important to improve air circulation. Mold develops in a humid environment, which can lead to health problems. After all, you will inhale harmful particles.


In the process of working with the ventilation system, various questions may arise. The answers to the heating and cooling system will be presented below.

How can I improve my cooling in one room?

You can install a fan on the ceiling and also close the windows during the day. Windows should be opened at night. Do not forget to dry the air, and also reduce the consumption of hot appliances. If there are rooms that are not being used, they should be closed.

What to do if no air is coming out of vents in one room?

If air does not enter the room through the ventilation opening, such openings in other rooms should be closed. You can close it completely or partially. This helps improve airflow.

Why is my room so hot compared to the rest of the house?

This can occur through poor insulation at home. To retain cold or hot air, depending on the season, it is important to provide good thermal insulation.


As you can see, you can improve the airflow in one room using a few simple methods. The main thing is to do everything under the supervision of the master or even entrust all the difficult work to the specialist.

Read about getting air in certain rooms in this article

Robert Brooks

I have an engineering background. I have my own house, where I live with my wife and children. I want to say that the most important thing when equipping a house is to choose the right heating, ventilation, and air conditioning systems.

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