I have a 3100 sq/f house and i want to install this unit. Western Massachusetts, humid 87F average summer, dry and cold winters 20F. Will it work?

Here's how to tell how it will work for you in any situation or building: It is 40 CFM (cubic feet per minute). So a room 10x10x8 is 800 CF. 800/40 = 20. It would take 20 minutes to replace the air. So for 3100, if you have 8' ceilings, that is 24,800 CF. Divide by 40 = 620 minutes. Divide by 60 and that is 10 hours and 20 minutes for one complete exchange of air. I wish I had thought to figure it that way before I bought it and wen through the considerable effort of installing it. I wouldn't have. Oh well. I guess it's better than nothing. (1290 x 9 = 11,610 11,610/40 - 290. 290/60 = nearly 5 hours to refresh. And all of this is if you have PERFECT piping, short run, etc. The fact is you probably will have far less than 40 CFM because just the little flap that keeps bugs out reduces your CFM by 2-5 or so. Hope this helps!

I want to mount this in a wall. Can I mount this with the intake and exhaust going up instead of down as suggested in the instructions?

I need to know the answer to this too. I am grade-on-slab, and I really need to mount this in the wall with the vents going UP, not DOWN. Why can't I do this ?

What the btu/heat transfer efficiency of this unit?

Just to clarify a little since I wasn't sure on this at first. The 66% ASE value describes the temperature transfer from outdoor air passing through the ERV to the air being exhausted. The Total Recovery Efficiency of 36% relates to the enthalpy heat transfer with includes the latent (energy stored in water vapor) and energy used to run the fans and any other energy loss. It is overly simplistic and misleading for Panasonic to say this is 66% for heating months and 36% in cooling months.

why does it shut down intake at 32 deg and can it be altered to a lower temp.

The damper shuts down at 32 degrees and cannot be altered because it prevents the core from freezing. If it were to get any colder you could ruin the core.

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Description

🌬️ Elevate your air game with Panasonic’s whisper-quiet, energy-smart ventilation!

WHISPER QUIET COMFORT - Operates at a barely-there 0.8 sone noise level—your home’s new silent air guardian.
BUILT TO LAST COMPLY - Backed by a 3-year warranty, UL listed, and meets the latest Energy Star and code standards—future-proof your air quality.
EFFORTLESS INSTALLATION - Comes with all mounting hardware and fits standard 4” ducts for a hassle-free upgrade.
BALANCED AIRFLOW MASTERY - Dual 4” ducts simultaneously exhaust stale air and supply fresh air, maintaining perfect indoor pressure.
ENERGY SMART VENTILATION - Consumes just 23 watts while moving more air, saving you money and reducing your carbon footprint.

The Panasonic FV-04VE1 WhisperComfort Balanced Air Solution ERV is a high-efficiency, ultra-quiet ventilation fan designed for continuous fresh air exchange in single rooms or homes. Featuring dual 4-inch ducts for balanced supply and exhaust, it operates at just 0.8 sones and 23 watts, ensuring energy savings without sacrificing performance. Easy to install with included hardware, it meets Energy Star standards and comes with a 3-year warranty, making it a reliable, code-compliant choice for healthier indoor air.

Specifications

Brand	Panasonic
Color	White
Electric fan design	Exhaust Fan
Power Source	Corded Electric
Style	Modern
Product Dimensions	16.73"D x 20.75"W x 9.41"H
Room Type	Home Office, Living Room
Special Feature	Manual
Recommended Uses For Product	Home
Noise Level	20 dB
Wattage	23
Finish Type	Aluminum
Air Flow Capacity	40 Cubic Feet Per Minute
Blade Length	4 Inches
Speed	1 RPM
Voltage	120
Switch Type	Push Button
Item Weight	24 Pounds
Indoor/Outdoor Usage	Indoor
Model Name	0.8-Sone 40 CFM
Specification Met	Energy Star
Control Method	App
Efficiency	High Efficiency
Is Cordless?	No
Number of Power Levels	1
Main Power Connector Type	Power Cord
Manufacturer	Panasonic
UPC	037988870448
Global Trade Identification Number	00037988870448
Size	Large
Part Number	FV-04VE1
Item Weight	24 pounds
Item model number	FV-04VE1
Is Discontinued By Manufacturer	No
Finish	Aluminum
Item Package Quantity	1
Special Features	Manual
Batteries Included?	No
Batteries Required?	No
Warranty Description	ALL Parts: For period of 3 years (36 months) from the date of the original purchase. DC Motor: For period of 6 years (72 months) from the date of the original purchase.

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