Ventilating Fans
GreenheckCSP-A390-VG
ENERGY STAR certified · Dec 2019
- Estimated annual energy use
- 57.8 kWh/yr
- Airflow
- 388 CFM
- Airflow per watt
- 4.9 CFM/W
Running cost calculator
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Cost to run a ventilating fan in every state
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How this is calculated
- ENERGY STAR lists the power this model draws but no yearly figure. We estimate the annual energy use ourselves, assuming 2 hours a day at its rated airflow, every day of the year. Your use will differ, so treat the cost as a guide.
- Yearly cost = annual kWh × your rate. Monthly cost is the yearly cost divided by 12, a flat average. Five-year cost keeps the rate constant; prices will change.
- Statewide averages are not your utility’s tariff. Use your bill’s rate for a closer number.
- We do not estimate watts or hourly cost: the source data does not include them.
How it compares
Among 14 ENERGY STAR certified in-line (single-port) models with a similar airflow (291 to 485 CFM), this one ranks 7th lowest in annual energy use.
- Median of these models
- 61 kWh/yr
- This model vs the median
- -6%
- Uses less than
- 50% of them
Compared with every comparable model on the ENERGY STAR list, not only the ones published on this site. Same type, similar size.
Same type and size, lower energy use
| Model | kWh/yr | Difference |
|---|---|---|
| S&P PCD300IL | 45 | 45 kWh |
| Ortech ODDIN-300 | 45 | 45 kWh |
| Fantech FG 8 EC | 50 | 50 kWh |
| Fantech FGC 8 EC | 50 | 50 kWh |
| Fantech FG 6M EC | 55 | 55 kWh |
Yearly cost by state
Same 57.800 kWh/yr at each state’s average residential price (2026-08).
Comparable models
Same type, within 25% of this model’s airflow.
Specifications
- Estimated annual energy use
- 57.8 kWh/yrOur estimate: listed airflow / CFM per watt, 2 h a day at the first speed setting, every day
- Airflow
- 388 CFMAirflow at the first speed setting
- Airflow per watt
- 4.9 CFM/WAirflow per watt at the first speed setting, as listed by ENERGY STAR
- Type
- In-line (single-port)
- Speeds
- 3 or more
- Duct size
- 8 inch depth X 8 inch width
- Sound level
- N/A sones
- Built-in light
- No
- Markets
- United States, Canada
- Available on market
- 2019-12-02
- ENERGY STAR ID
- 2353546
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Frequently asked questions
How much electricity does the Greenheck CSP-A390-VG use?
ENERGY STAR lists the power this model draws but no yearly figure, so we estimate about 57.8 kWh per year, assuming 2 hours a day at its rated airflow, every day of the year. Your use will differ with how long the fan runs; some homes run a bathroom fan only for a few minutes, others around the clock.
How much does it cost to run?
At statewide average residential prices, the listed annual use costs about $7.35 in Nevada and $27.27 in Hawaii (EIA, 2026-08). Your own utility rate may be different; enter it in the calculator.
How does the Greenheck CSP-A390-VG compare with similar models?
Among 14 ENERGY STAR certified in-line (single-port) models with a similar airflow, it ranks 7th lowest in annual energy use. Its 57.8 kWh per year is 6% below the median of 61.2 kWh.
How much air does it move?
ENERGY STAR lists 388 CFM at its first speed setting. Choose a fan whose airflow suits the room and the duct size.
What does CFM per watt mean?
It is the air moved per watt of power, so a higher number means more ventilation for the same electricity. This model is listed at 4.9 CFM/W.
Learn more
Methodology and sources
Model data comes from the ENERGY STAR Certified Ventilating Fans dataset (EPA). Electricity prices are statewide average residential prices from the U.S. EIA, latest period August 2026. Values are stored locally and refreshed by scheduled imports. Missing values are left blank, never estimated.