Firegas FGS-USB13G70AC 30 in Insert
#1 in InsertsFull review
A low-cost insert with strong airflow and both ducted and ductless filters in the box.
Amazon $155.99$155.99
The Firegas FGS-USB13G70AC 30 in Insert rates 3.9 among inserts range hoods; the Broan-NuTone Mantra MTR3304SS 30 in rates 3.6 among under-cabinet ones. The Firegas FGS-USB13G70AC 30 in Insert costs $268.49 less ($155.99 vs $424.48).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Broan-NuTone Mantra MTR3304SS 30 in
#3 in Under-cabinetFull review
A smart under-cabinet hood that sets its own fan speed from the heat of the range. Good for busy cooks who forget to turn the hood on.
Amazon $424.48$424.48
Scores side by side
These two sit in different type classes (inserts and under-cabinet), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Firegas FGS-USB13G70AC 30 in Insert | Broan-NuTone Mantra MTR3304SS 30 in |
|---|---|---|
| Overall rating | 3.9/5 | 3.6/5 |
| Airflow 20% | 100 600 CFM | 100 490 CFM |
| Quiet at full speed 20% | 90 57 dB | 30 7.5 sones (about 69 dB) |
| Quiet at low speed 15% | 50 noise at low speed not published (neutral score used) | 56 1.3 sones (about 44 dB) |
| Features 20% | 55 dishwasher-safe steel filters, LED lighting, 3 or more speeds, converts to ductless | 100 dishwasher-safe steel filters, airflow cap for make-up air codes, LED lighting, 3 or more speeds, delayed shut-off, converts to ductless, gesture, remote or app control, automatic fan speed |
| Price 15% | 81 $155.99 | 37 $424.48 |
| Warranty 10% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| Firegas FGS-USB13G70AC 30 in Insert | Broan-NuTone Mantra MTR3304SS 30 in | |
|---|---|---|
| Airflow and noise | ||
| Max airflow | 600 CFM | 490 CFM |
| HVI-certified airflow (0.1 in.) | - | 390 CFM |
| Noise at max speed | 57 dB | 7.5 sones |
| Noise at low speed | - | 1.3 sones |
| Fan speeds | 3 | 3 |
| Installation | ||
| Mount | Insert | Under-cabinet |
| Width | 30 in | 30 in |
| Venting | Ducted or ductless | Ducted or ductless |
| Duct connection | 6 in round | 3-1/4 x 10 in or 7 in round |
| Power | Plug-in | Hardwired |
| Airflow cap for make-up air codes | No | Yes |
| Features | ||
| Grease filters | Steel baffle | Steel baffle |
| LED lighting | Yes | Yes |
| Controls | Push button | Touch, gesture |
| Delayed shut-off | - | Yes |
| Automatic fan speed | No | Yes |
| Build | ||
| Weight | - | 27.1 lb |
| Warranty | - | 1 year |