What does furnace CFM mean?
Cubic Feet Per Minute
Cubic Feet Per Minute (CFM) is a measurement of airflow volume, determined by how many cubic feet of air pass by a stationary point in one minute. Larger homes circulate more air (since there’s more space for it to move around), so they will have a higher CFM.
How many CFM do I need for my furnace?
Condensing furnaces require 150 cfm per 10, 000 Btu input. Induced draft furnaces require 130 cfm per 10,000 Btu input, and natural draft furnaces require 100 cfm per 10, 000 Btu input.
How many CFM is a 90000 BTU furnace?
1,600 CFM
90,000 BTU Furnace, 80% Efficiency, Single-Stage Burner, 1,600 CFM High-Efficiency Blower, Upflow/Horizontal Flow Application.
How many CFM do I need for 120 square feet?
For example, for a room that’s 120 square feet and has a 10-foot ceiling: 120 x 10 = 1,200. 1,200 divided by 60 = 20. 20 x 8 = 160 CFM.
How many CFM is a 40 000 BTU furnace?
Installation
| 40,000 BTU 96% AFUE Variable Speed Goodman Gas Furnace – Upflow/Horizontal | |
|---|---|
| Furnace Efficiency / AFUE | 96% |
| Heating BTU | 40,000 |
| Blower Motor | Variable Speed – ECM |
| Maximum CFM | 1200 |
Can you have too much CFM in a bathroom?
Wasting Energy With Excessive Ventilation Increased CFM will not dry out the bathroom any faster, so the fan will still have to run for the same amount of time. However, since the airflow is higher a lot more energy is lost.
How many CFM is a 70 000 BTU furnace?
70,000 BTU Furnace, 95% Efficiency, Two-Stage Burner, 1,200 CFM Variable-Speed Blower, Upflow/Horizontal Flow Application.
Is 80 cfm enough for a bathroom fan?
In general, choose a fan that can move at least 1 CFM per square foot of room. So, for an 80 square foot bathroom, select an 80 CFM fan. For medium-sized bathrooms, use 80 to 99 CFM bath fans. For large bathrooms that are over 100 square feet but under 150 square feet, use over 100 CFM bath fans.
What is a good CFM rating for a bathroom fan?
Ventilation rates based upon eight air changes per hour are generally suggested. For most bathrooms this works out to one CFM per square foot of bathroom area. For example, a 7′ x 10′ bathroom would require a 70 CFM fan. A 50 CFM rating is recommended as a minimum for bathrooms 50 sq.
Can you have too much CFM in bathroom?
It is OK to get a 20-30 % higher capacity exhaust fan than specified by the CFM calculator. A 20-30% stronger bathroom fan will exhaust the moist air slightly faster. Anything above that is simply wasting energy since the water can’t evaporate fast enough. It will take at least half an hour for the moisture to clear.
