Does it use the same ceiling mounts as previous first alert detectors?

The ceiling mount is different, but the screws are in the same place. Just loosen the screws, swith mounts, and tighten back up.

Do you ceiling mount this fore/co2 alarm? doesn't co2 settle to the ground first?

This is a CO alarm, not a CO2 alarm. CO2 is what makes your soda fizzy and is in in chained cylinders at restaurants... CO is an odorless, tasteless, colorless gas. The ONLY way to detect it is by detector. It is generated by any gas-powered appliances like dryers, stoves, snowblowers, cars, etc, and by burning like fire places. CO is BARELY lighter than air (about .96 to air being 1 for vapor density), and will mix and collect like normal air does, with drafts and normal air movement. CO detectors can be mounted at just about any height, though many manufacturers (somewhat arbitrarily) picked 5ft or chest height as the ideal mounting height. Smoke and heat rise, so smoke/heat detectors are required to be mounted within 12" of the ceiling. Combination detectors are common, and need to be mounted within 12" of the ceiling for the smoke function to operate properly.

Does this device contain a hush feature to silence nuisance alarms?

It didn't on the one(of 5) that I purchased and had to take down.

I have just removed 4 model no. 7020b because it was incompatible with my outback solar energy system. will these mount over the same opening?

The actual base is 6 in in diameter and the holes for screws are 4 inches apart

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First Alert BRK PRC710 Smoke and Carbon Monoxide Alarm with Built-In 10-Year Battery, White

Product ID: 701783890

Details

Brand
First Alert
Colour
White
Power source
Battery
Product dimensions
1.4D x 5.8W x
Style
PRC710

📢85 dB loud alarm

🔋10-year built-in lithium battery

🔥Photoelectric sensor for smoldering fires

Description

🚨 Safety that’s slim, smart, and built to last—because your peace of mind shouldn’t quit early.

LOUD CLEAR ALERTS - 85-decibel alarm ensures you and your loved ones hear danger loud and clear, even in busy homes.
SLEEK DISCREET DESIGN - Ultra-thin profile blends seamlessly with modern interiors—safety that complements your style.
DECADE LONG PEACE OF MIND - Built-in 10-year lithium battery means no replacements or wiring hassles—set it and forget it.
SMART SMOKE CO DETECTION - Advanced photoelectric and electrochemical sensors catch smoldering fires and invisible carbon monoxide early, minimizing false alarms.
EFFORTLESS INSTALLATION SECURITY - Twist-lock mounting and tamper-resistant features make setup quick and keep your alarm secure.

The First Alert BRK PRC710 is a sleek, low-profile smoke and carbon monoxide alarm featuring a 10-year built-in lithium battery, advanced photoelectric and electrochemical sensors for reliable detection, and an 85 dB alarm. Designed for easy twist-lock installation without wiring, it minimizes false alarms and meets UL safety standards, providing long-lasting, hassle-free protection for modern homes.

Specifications

Alarm	Visual
Asin	B00ON6M56Y
Best Sellers Rank	#115,341 in Electronics (See Top 100 in Electronics) #3,504 in Household Batteries & Chargers
Brand	First Alert
Built In Media	First Alert PRC710 10-Year Combination Carbon Monoxide and Photoelectric Smoke Detector, Mounting Bracket
Color	White
Compatible Devices	Residential, General Household
Customer Reviews	4.4 4.4 out of 5 stars (5,015) 4.4 out of 5 stars
Enclosure Material	Carbon
Global Trade Identification Number	00029054014504
Item Dimensions D X W X H	1.4D x 5.8W x 5.8H centimeters
Item Type Name	Combination Alarm
Manufacturer	First Alert
Mfr Part Number	PRC710
Model Number	PRC710
Number Of Items	1
Operating Humidity	70 percent by volume
Power Source	Battery Powered
Product Style	PRC710
Sensor Type	Electrochemical
Unit Count	1 Count
Upc	029054014504

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