Can I put a more powerful blower in my furnace?

Author: Brannon Runolfsson V  |  Last update: Friday, February 28, 2025

Can I put a bigger blower motor in my furnace so it will perform better? While upgrading blower motor sizes is possible, you might not need to install a replacement motor at all. Sometimes a simple repair is all you need to get your furnace fully functional again.

Can I put a stronger blower in my furnace?

If you have a direct drive blower where the motor lies within the blower wheel then you cannot install a physically larger motor but can install a greater hp rated one. You have to make sure that the mount can take the extra weight. A larger motor may not give you more airflow though.

Can you increase blower speed on a furnace?

When increasing the blower speed, loosen the setscrew a little bit. This is the part that holds the pulley to the furnace's driveshaft. Turn the pulley one rotation clockwise on the shaft. If you want even more speed, do two rotations.

How do I increase the airflow in my furnace?

Here are a few ways to increase airflow through your air ducts and improve the comfort of your home.
  1. Clean the Air Ducts. ...
  2. Add Ductwork Extensions or Registers. ...
  3. Install Automatic Dampers on Your Vents. ...
  4. Replace Furnace Filters. ...
  5. Install a Whole House Fan. ...
  6. Add More Insulation to Your Walls. ...
  7. Seal Up Drafty Windows and Doors.

Can you upgrade a HVAC blower motor?

Yes, a furnace blower motor can be upgraded or replaced to increase its performance, but there are several important considerations to keep in mind:

Changing the Blower Speed on a Furnace

How do I increase my blower capacity?

There are several options for increasing the capacity of this type of equipment without necessarily replacing it:
  1. Modification(s) to the blower and/or drive machine.
  2. Cooling of intake air by water misting or cooling with refrigeration units.
  3. Oxygen injection at blower discharge.

Can I put a bigger motor in my furnace?

If you're asking, “Can I put a bigger blower motor in my furnace?” the correct answer is no. Furnace manufacturers carefully assemble the components that make up the system after rigorous testing. Installing a bigger blower motor can upset the balance, leading to various issues.

Why is my furnace blower not strong enough?

Furnace Not Blowing Hard Enough

If the furnace blowers are generating heat in insufficient quantities, the issue is likely due to either a dirty motor or a loose blower belt. The motor can accumulate dirt over time and the gradual buildup can wear down the system.

Why is my bedroom hotter than the rest of the house?

Common issues like leaks, disconnections, or obstructions within the ducts disrupt the flow of cooled air, causing rooms farther from the HVAC unit to suffer the most. In some cases, inadequate insulation of ducts can allow heat to infiltrate, further exacerbating the problem.

How can I improve my furnace efficiency?

11 Tips to Help Your Furnace Work Better
  1. Make Sure the Filter is Clean. ...
  2. Use a Programmable Thermostat. ...
  3. Make Sure all Registers are Open and Free of Debris. ...
  4. Keep the Area Around the Furnace Clear. ...
  5. Curtains are a Great Way to Save Energy. ...
  6. Get Regular Furnace Tune Ups. ...
  7. Use Ceiling Fans. ...
  8. Bake More in the Winter Months.

How can I increase my blower efficiency?

Change of fan location to increase blower efficiency

Relocating your blower to reduce its length of runs and straightening bends can help you reduce energy consumption by 5 to 30 percent.

What makes a blower more powerful?

Cubic feet per minute (CFM) ratings measure the volume of air the blower moves. Blowers with higher CFM ratings can move more material. Some vacuum-capable models include larger-diameter chutes or tubes, which help collect leaves.

How do I know if my furnace blower motor is weak?

Here are the key indicators:
  1. Unusual Noises. Screeching or Squealing. ...
  2. Weak Airflow. Insufficient Heating. ...
  3. Motor Overheating. Excessive Heat from the Furnace. ...
  4. Inconsistent Performance. Start-Stop Issues. ...
  5. High Energy Bills. An inefficient, struggling blower motor often increases energy usage and higher bills.
  6. Age and Wear.

How many CFM is a typical furnace blower?

Furnace Blower Options

In essence, the unit is either operating at full capacity when the thermostat calls for heating, or it is turned off when the demand is met. Single speed blowers are factory calibrated to operate between 1200-1800 CFM, which will generally meet the requirements of a 1000-2000 square foot home.

How do I increase my blower pressure?

To increase the static pressure of a blower, you can optimize the design by adjusting the impeller shape or size, increasing the speed of the blower, or adding additional stages to the blower.

Which of the following is the best procedure to increase the furnace blower speed?

Final answer: To increase the furnace blower speed, the best option is to install a higher horsepower fan motor. This can drive the fan at a higher speed, while altering the motor pulley or the size of the return air duct would have less effect.

How do I fix the hottest room in my house?

For your convenience, we've kept these in a logical order beginning with the simplest and most likely culprits to the more expensive but assertive solutions.
  1. Crack your bedroom doors. ...
  2. Make use of your HVAC's fan. ...
  3. Turn down your A/C a few degrees at night. ...
  4. Change your filter. ...
  5. Install a humidity sensing thermostat.

Why is my house 10 degrees hotter than outside?

With the sun shining on your home, a greenhouse effect can take place – with your house actually getting much hotter than the 20-odd degrees outside. This applies to three main areas – your walls, windows and roof. Starting at the top, your roof space will heat up when the sun is beaming down on it.

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

What causes high humidity in a house? High humidity in a house can be caused by many things, but the biggest reason is poor ventilation—in other words, air isn't being circulated properly, which causes the air in your house to become stagnant and humid. The other major reason? Too much air exchange with the outside.

Can I put a bigger blower on my furnace?

No, you should not put a bigger blower motor in your furnace.

Why is my furnace not blowing enough hot air?

Your furnace needs a clean, clear air filter to circulate hot air efficiently. Over time, debris, dust, and allergens build up on these filters, which eventually causes them to clog. So, if your furnace is blowing cold air, you'll want to check your air filter. Once you've taken it out, hold it up to the light.

How much to replace a blower motor in a furnace?

Replacing a furnace blower motor costs $560, on average. Depending on the size and type of motor, most people pay $300 to $900. The average blower motor replacement cost is $560, but the final price depends on labor fees, as well as the cost of the parts.

Can you upgrade a furnace blower?

Upgrading your HVAC blower motor can significantly improve the performance and efficiency of your heating and cooling system. Whether you're experiencing issues with your current motor or simply looking to enhance your home's comfort, an upgraded blower motor can offer numerous benefits.

How can I increase my furnace blower speed?

Steps to Change Furnace Blower Speed

Turn off any gas lines. When it's safe, open the main furnace panel. The blower motor sits near the base and next to the main air filter. For a pulley blower motor, adjust the length of the pulley to increase or decrease the speed.

Is it better to oversize or undersize HVAC?

Neither oversizing nor undersizing your AC unit is ideal. Both scenarios can lead to issues with efficiency, comfort, and longevity of the system.

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