Master Flow · Exhaust fan · Medium airflow

Master Flow ERV6BLHT Powered Roof-Mount Attic Fan

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Photos: Amazon product listing ↗ · refreshed Sep 16, 2026

Airflow (high): 1,500 CFM

Master Flow ERV6BLHT Powered Roof-Mount Attic Fan is a exhaust fan with 1,500 CFM rated airflow.

See price on Amazon Is 1,500 CFM enough for my room?Compare this fan

What works

1,500 CFM rated airflow

What doesn't

Installed airflow depends on resistance in the ventilation path

Who it's for

Good fit

Moving air through a compatible opening or ventilation path

Look elsewhere if

You need a freestanding room circulator

Master Flow ERV6BLHT Powered Roof-Mount Attic Fan is a exhaust fan with 1,500 CFM rated airflow.

Check the required opening, power supply and make-up air path. Ducts, shutters and screens can reduce delivered airflow below a free-air rating.

See the current Amazon listing for the supplied configuration, and use the specification sources on this page to check the documented values.

Before you buy

Installation and buying checks

Use these questions to verify the exact configuration. Linked facts are cited; unlisted details stay questions.

Mounting and support
What mounting method and hardware does the exact unit require?
Clearance and handling
What are the installed dimensions, weight, and clearances?
Electrical match
What voltage and connection requirements does the exact unit specify?
Airflow at the job
Is the listed airflow rated at an operating point that matches the job after placement, obstructions, and system resistance are considered?
- Airflow (high): 1,500 CFMAmazon listing ↗
Location requirements
Does the site require an environmental rating or guard? Neither is listed here.

Put 1,500 CFM in context

The Master Flow ERV6BLHT Powered Roof-Mount Attic Fan has a listed airflow of 1,500 cubic feet per minute. The table compares this rated volume with example room volumes. It does not measure fresh-air exchange, air speed at your body, or room coverage.

Room	Size	Nominal room volumes / hour	Nominal pass interval
One-car garage	22 × 12 × 9 ft · 2,376 ft³	38×	1.6 min
Two-car garage	22 × 20 × 9 ft · 3,960 ft³	23×	2.6 min
Workshop	40 × 30 × 12 ft · 14,400 ft³	6.3×	9.6 min
Warehouse bay	100 × 50 × 16 ft · 80,000 ft³	1.1×	53 min

A circulation fan does not by itself replace indoor air. Exhaust airflow depends on a makeup-air path and system resistance. Use installed outdoor airflow for ventilation calculations.

Formula: airflow × 60 ÷ room volume. CDC explains the ventilation form of this equation; here the input is a catalog rating, so the result is a volume comparison.

Work it out for your own room →

Listing details

What we know about this listing

Listing data was imported on September 15, 2026. Each specification can have a different source-check date; the evidence below is the most precise source information available here.

Sources for 1 listed specification