The main factor to consider when purchasing a whole house fan is the size of your attic, which will inform you of the size fan you’ll need. A larger attic will typically require a stronger fan, otherwise it won’t be powerful enough to displace the warm air and won’t function efficiently.

How do I choose a whole house fan?

To get the proper whole house fan size, you should first calculate the square footage inside your home, excluding the basement, attic, and garage. Multiply the square footage by 3. For instance, if your home is 2,200 square feet, you’ll need a fan that can move 6,600 CFM of air per minute or more.

What CFM whole house fan do I need?

We use a general formula of either 2, 2.5, or 3 CFM, or “Cubic Feet per Minute”, per square foot of living space. 2 CFM would provide a good system, 2.5 CFM would provide a better system, and 3 CFM would provide the best system.

How many windows should you open with a whole house fan?

A: Opening two or more windows half way or more is recommended. Basically you should make it easy for the home ventilation system to pull in air. As for which windows to open, for general cooling you want to open windows far away from the fan to provide airflow to the whole house.

Which house fan is the best?

The Best Fan

  • Our pick. Vornado 630 Medium Air Circulator. …
  • Also great. Vornado 460 Small Air Circulator. …
  • Upgrade pick. Vornado 660 AE Large Air Circulator with Alexa. …
  • Also great. Vornado Vfan Alchemy. …
  • Upgrade pick. Vornado 610DC Energy Smart Medium Air Circulator. …
  • Budget pick. Honeywell TurboForce Air Circulator Fan HT-900.

Is a higher CFM better?

A: Airflow quantifies the amount of air a ceiling fan delivers and is measured in CFM which stands for cubic feet per minute. CFM measurements are taken when a fan is on high speed, then that number is divided by the watts used. This means that the higher the CFM, the more efficient the fan, and the more air it moves.

How many CFM do I need for 1000 square feet?

If you only need the air changed 1 time per hour (ACH = 1), then just . 135 CFM is needed per square foot of space. So, a 100 square foot room would need 13.5 CFM. A 1,000 square foot room would need 135 CFM.

How many CFM do I need for a 3000 sq ft house?

Heat and energy recovery ventilators

Total area of home (square feet) Continuous ventilation rate
1,000 square feet 50 CFM
2,000 square feet 100 CFM
3,000 square feet 150 CFM

How many vents do I need for a whole house fan?

Venting Requirements
A rule of thumb is that you should have one square foot of “net free venting area” for every 750 CFM of airflow. So at 3000 CFM, you’ll want four square feet of venting. Most modern homes easily accommodate this rule, but it is important to check to ensure optimum system efficiency.

How many CFM do I need for 500 square feet?

That’s why we need to divide the total volume by 60; hence 4,800/60 = 80 CFM. Answer: You need an 80 CFM airflow (for 300 sq ft standard room and 2 ACH).
CFM Chart For Common Room Sizes.

Room Size: CFM (At 2 ACH)
How many CFM for a 400 sq ft room? 107 CFM
How many CFM for a 500 sq ft room? 133 CFM

Which type of fan gives more air?

A ceiling fan with more blades provides more air.

What type of fan is best for cooling?

Our Top Picks

  • Best Overall Fan: Vornado 660 Large Air Circulator.
  • Best Budget Fan: Honeywell TurboForce Air Circulator Fan.
  • Best Quiet Fan: Honeywell QuietSet Whole Room Tower Fan.
  • Best Pedestal Fan: Pelonis 16-Inch Pedestal Fan.
  • Best Tower Fan: Lasko All Season Comfort Control Tower Fan & Heater.

Do whole house fans bring in dust?

Some types of whole-house fans bring air from the outside and at the same time push air out of your house. In these cases, it makes sense to have a filter, as the outdoor air could contain contaminants, especially dust or, if you live in a metropolitan area, exhaust fumes.

How many CFM do I need?

To calculate the CFM for a gas stove, add the BTU ratings for all burners. Typically, 5,000 to 15,000 per burner is common, and a standard size four-burner stove will be about 40,000 BTU total. Divide your total by 100 to figure the CFM you need.

How can you tell how strong a fan is?

Fan power is usually measured by the airflow it generates in cubic feet per minute, or CFM. The higher the CFM rating, the more powerful the airflow. Most fans, whether household fans or commercial/industrial fans, have more than one fan speed so you have a range of airflow.

How many CFM do I need per square foot?

One cfm

One cfm is needed per square foot (1 cfm/sq ft) of floor area. This is the average air quantity required for a room or an entire building. This number is based upon an averaged heat load calculation for comfort cooling.

How do I calculate CFM for my house?

This practical math formula goes a long way when you’re considering air ventilation improvement in an indoor space:

  1. CFM = (fpm * area), where fpm is the feet per minute.
  2. To find the cubic feet per minute, substitute the FPM value with the area after the area is squared.

How many CFM does a 80000 BTU furnace?


80,000 BTU 96% AFUE Variable Speed Goodman Gas Furnace 1600 CFM – Upflow/Horizontal
Furnace Efficiency / AFUE 96%
Heating BTU 80,000
Blower Motor Variable Speed – ECM
Maximum CFM 1600

How many CFM is a 60000 BTU furnace?


60,000 BTU 96% AFUE Variable Speed Goodman Gas Furnace – Upflow/Horizontal
Heating BTU 60,000
Blower Motor Variable Speed – ECM
Maximum CFM 1200
Configuration Upflow/Horizontal

What size furnace do I need for a 3000 sq ft home?

The general rule of thumb is that you want 40-45 BTUs of heat per square foot of your home. So, if your home is 3,000 square feet, you’ll want a furnace that produces between 120,000 BTUs and 135,000 BTUs. The more BTUs, the more expensive the furnace.

How many square feet does a 60000 BTU furnace heat?

How Many Square Feet Will 30,000 – 120,000 BTU Furnace Heat?

Furnace Capacity Square Footage(Hot Climate) Square Footage(Moderate Climate)
45,000 BTU 1,500 sq ft 1,000 sq ft
50,000 BTU 1,650 sq ft 1,100 sq ft
60,000 BTU 2,000 sq ft 1,320 sq ft
70,000 BTU 2,320 sq ft 1,550 sq ft