how do you choose the cfm needed for bathroom?
A good rule of thumb is to divide your total square feet by 7.5. That should provide an estimate of CFM necessary for your bathroom.

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The Broan 100HL is a bathroom exhaust fan with a directional heater and lighting. You don’t need to heat the entire house to have a comfortable bathroom first thing in the morning. And it simply doesn’t make sense to wait for your central heating system to do what Broan-NuTone can do instantly. The Broan 100HL heater, fan and light provides powerful heating, light and ventilation at the touch of a switch. And with our 360° directionally- adjustable heat outlet, you’re assured the heat will end up exactly where you need it. Now you can put soothing heat exactly where you want it. With Broan’s exclusive directional dial, you direct where it goes over a full 360°. What’s more, you save energy by heating only the space you need.
Broan 100HL Bath Fan Specs
The 100 HL bath fan includes it all; quite fan, heater, and light. A powerful and quite 100 cfm fan runs at a quite 2 sones. A 1500w watt heater puts out 5120 btus of heat, and light fixture for a 100w blub. When it comes to keeping a bathroom vented, warm and light the Broan 100hl is a great option.
This product is listed under the following manufacturer number(s):
*Denotes a finish or option that has been discontinued
A good rule of thumb is to divide your total square feet by 7.5. That should provide an estimate of CFM necessary for your bathroom.
The Broan 100HL is will fit a 11.5 x 17.5 opening. thank you
The Broan 100HL can be mounted on a sloped ceiling.
I would recommend the Broan 66W three rocker switch, then you can control each function independently.
As per Broan The unit will operate most quietly and efficiently when located where the shortest possible duct run and minimum number of elbows will be needed. They do not give a maximum duct run length.
The Broan 100HL can be installed directly above a shower, it is UL listed for wet locations.
| Amperage | 14.5 |
|---|---|
| Bulb Base | Medium (E26) |
| Bulb Type | Incandescent |
| Bulbs Included | No |
| CFM | 100 |
| CFM (High) to Sones | 100 to 2 |
| Category | Sale |
| Configuration | Exhaust Fan |
| Country Of Origin | USA |
| Duct Size | 4" Round |
| Function | Bath Fan, Heater, Light |
| Grille Finish | White Polymeric |
| Grille Length | 17.5 |
| Grille Width | 11.5 |
| HVI Certified | Yes |
| Heater Included | Yes |
| Heater Watts | 1500 |
| Housing Depth | 5.875 |
| Housing Height | 5.875 |
| Housing Length | 16 |
| Housing Width | 10.25 |
| Humidity Sensing | No |
| Installation Type | Ceiling |
| Lead Time | 1 Billion |
| Light Included | Yes |
| Lighting Watts Main / Nightlight | 100W |
| MasterFinish | Whites |
| Motion Sensor | No |
| Number of Bulbs | 1 |
| Sones | 2.0 |
| UL Listed | Yes |
| Voltage | 120 |
| Wattage | 100 |
| Watts Per Bulb | 100 |
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