You asked: What size blower motor do I need?

How do I know what blower motor I need?

To get the right blower motor for your air-conditioner, the contractor has to consider a number of things. They include the type of drive, the diameter of the motor, rotation direction, horsepower, voltage, speeds, and size of the capacitor. The company will first determine the right replacement for your motor.

How do you size a blower motor?

The rule of thumb is the blower should produce 440 CFM (cubic feet per minute) of air per ton. On a two-ton system that is 880 cfm (cubic feet per minute). This usually calculates out to about a 1/4 to 1/3 HP blower motor.

Can I put a bigger blower in my furnace?

Yes, you can place a bigger blower motor in your furnace. However, you will need to check the user’s guide for your furnace to see its limitations as far as voltage, horsepower, and amp usage.

Can I upgrade my furnace blower motor?

Both your heating costs as well as the comfort level inside your home can benefit by upgrading from an outmoded PSC unit to an ECM furnace blower motor. It’s a good bet that the motor inside your existing furnace blower is a PSC (permanent split capacitor) type.

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How long do HVAC blower motors last?

Variable-speed blower motors have a variety of speed settings that offer more control over your system. Variable-speed blower motors can have a life expectancy of 15-20 years. But when they do break down, variable-speed blower motors are more expensive to replace than PSC motors.

What are the signs of a bad blower motor?

What are the symptoms of a bad blower motor?

  • Low/no airflow from vents. The classic sign of a bad blower motor is restricted airflow coming from your air vents. …
  • Strange sounds coming from blower. …
  • Circuit breaker keeps tripping. …
  • Hot/burning smell coming from air vents.

How many amps should a blower motor draw?

Up to 20 Amps or more. Amperage is how much power a device is consuming. The Amps will be labeled on the motor’s name tag.

Do blower motors get weak?

Weak airflow is a sign of blower motor failure. This part wears out eventually, meaning its fans can no longer push adequate amount of air out the vents or through window defrosters.

How do I increase the CFM of my blower?

You can increase or decrease the blower speed by slightly adjusting the pulley on the blower drive motor. To increase blower speed, slightly loosen the setscrew that holds the pulley to the driveshaft. Move or turn the pulley clockwise on the shaft one turn, then tighten setscrew.

How much are furnace blower motors?

The typical cost of a furnace blower motor is $450, but the final price depends on labor fees, as well as the cost of the parts. Some higher-end models feature large or hard-to-reach motors, which could bring your HVAC blower replacement cost to as much as $2,000.

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How do I increase the CFM of my furnace?

5 Ways to Improve Airflow in Your Home

  1. Check Vents and Registers. One of the simplest things you can do to increase airflow in your home is to check the vents and registers in each room. …
  2. Turn on Ceiling Fans. …
  3. Schedule HVAC Maintenance. …
  4. Consider Duct Cleaning. …
  5. Invest in a Ventilator.

How many motors does a furnace have?

There are two types of furnace motor. The furnace’s blower wheel has a direct drive motor.

Can I upgrade my furnace blower to variable speed?

When upgrading your furnace, consider adding a variable speed furnace blower motor. It can improve the efficiency of your heating system while making your home more comfortable. Single-speed blower motors function at full power or not at all, switching off and on to regulate your indoor temperatures.

What is a ECM furnace blower motor?

The term “Variable Speed” actually refers to the blower motor inside the furnace or air handler. It’s an Electronically commutated motor, or (ECM). ECM’s are DC motors that function using a built-in inverter and a magnet rotor, and as a result are able to achieve greater efficiency than most AC motors.