9 Best Smoke Alarms with Voice Alerts (November 2026)
The best smoke detectors with voice alerts include the First Alert BRK SMI100-AC Hardwired Smoke Detector for 6-alarm hardwired coverage, the Kidde Smoke & Carbon Monoxide Detector for hardwired voice alerts, and the X-Sense Smoke Detector for standalone smoke coverage.
On this page (15 sections)
- Which smoke detector with voice alert is best for each home?
- How we compared voice smoke alarms
- What should you check before choosing a voice smoke alarm?
- 1. First Alert BRK SMI100-AC Hardwired Smoke Detector
- 2. Kidde Smoke & Carbon Monoxide Detector
- 3. X-Sense Smoke Detector
- 4. X-Sense Smoke Detector Carbon Monoxide Detector Combo
- 5. Kidde Smoke & Carbon Monoxide Detector
- 6. SITERWELL Smoke Detector
- 7. SITERWELL Hardwired Smoke and Carbon Monoxide Detector
- 8. Heiman smoke detector carbon monoxide detector combo
- 9. SITERWELL Siterlink Smoke Detectors 10 Year Sealed
- Are voice smoke alarms worth choosing?
- How should you maintain a smoke detector with voice alert?
- Final choice: which voice smoke alarm should you buy?
The best smoke detector with voice alert for most homes is the Kidde Smoke & Carbon Monoxide Detector with a 10-year battery. It announces “Fire!”, “Warning Carbon Monoxide!” or “Replace Alarm!”, so you can identify the hazard without interpreting a pattern of beeps.
The hardwired Kidde is the stronger choice for an interconnected system. For bilingual households, the SITERWELL Siterlink adds English and French voice alerts.
The other picks cover homes that need photoelectric sensing, sealed batteries or smoke and CO detection without spoken messages.
A smoke alarm with a voice warning is still only one part of a home safety plan. Start with our guide to what is a smoke alarm if you want the basic difference between alarms, sensors and power systems.
Our score weighs specs, features and buyer feedback against the needs of someone shopping for a smoke detector with voice alert.
Our picks at a glance
-
1
Best for 6-alarm hardwired coverageFirst Alert BRK SMI100-AC Hardwired Smoke Detector
9.6/10 our score
See it on Amazon -
2
Best for hardwired voice alertsKidde Smoke & Carbon Monoxide Detector
9.6/10 our score
See it on Amazon -
3
- 4
Check itX-Sense Smoke Detector Carbon Monoxide Detector Combo
Best for standalone smoke and CO - 5
Check itKidde Smoke & Carbon Monoxide Detector
Best for 10-year battery voice alerts - 6
Best for interconnected photoelectric alarmsCheck it - 7
Check itSITERWELL Hardwired Smoke and Carbon Monoxide Detector
Best for wired or wireless combo systems - 8
Check itHeiman smoke detector carbon monoxide detector combo
Best for compact sealed-battery combo coverage - 9
Check itSITERWELL Siterlink Smoke Detectors 10 Year Sealed
Best for bilingual voice alerts
Which smoke detector with voice alert is best for each home?
The best choice depends on whether you need spoken warnings, carbon monoxide coverage, hardwired power or a sealed battery. Each of those needs points to a different kind of alarm, and the wrong match can leave a room or a whole floor less well covered.
The highest scoring models offer the clearest match for voice alert needs, but that does not mean they suit every home. A non voice alarm can still be the better fit when its sensor, power source or installation style matches your home more closely.
Think first about the rooms you need to cover and how they are wired today. A hardwired alarm may suit a whole house replacement, while a battery model may suit a single room, a rental or a place without a suitable electrical box.
Then decide which hazards you need in each location. Smoke only coverage can be enough where carbon monoxide is already covered, but combination detection puts both sensors in one housing for simpler placement.
Voice alerts should be weighed alongside placement and care, not instead of them. A clear spoken message helps, but correct location, regular testing and prompt replacement at end of life still matter.
How we compared voice smoke alarms
We compared sensor type, power source, voice messages, smoke and CO coverage, interconnection and maintenance needs.
We also checked whether each model was standalone or designed to work with other alarms.
Voice alerts help when you want the alarm to name the hazard. A spoken warning can distinguish fire from carbon monoxide, while a standard siren mainly signals that an alarm condition exists.
Scores reflect stated features and fit for voice smoke alarms. A model can score well for detection or power even without a voice function, so the score alone is not a voice alert rating.
Sensor type was a major point of comparison. Ionization models target fast flaming fires, while photoelectric models target slow smoldering fires and can reduce some cooking nuisance alarms.
Combination models add electrochemical sensing for carbon monoxide.
Power source shaped the comparison as much as sensing. Hardwired alarms with battery backup keep working during a power failure and can interconnect, but they need compatible wiring.
Sealed battery alarms simplify installation, yet they are often standalone and must be replaced as a complete unit at end of life.
Interconnection mattered for whole home coverage. When alarms are linked, a trigger in one room can sound alarms elsewhere, which may help people in distant rooms respond sooner.
Compatibility limits differ by brand, so mixing products without checking can create a gap.
Maintenance needs were checked alongside headline features. Test and hush controls, low battery warnings, end of life messages and backup battery replacement all affect daily use.
We kept the comparison to stated product data. Voice messages, alarm levels, dimensions, pack sizes and connection limits are described only where stated for that product.
What should you check before choosing a voice smoke alarm?
Check the existing power connection first. A hardwired replacement may suit a home with AC alarm wiring, while a battery model can be simpler for a room without a suitable electrical box.
Next, decide if you need smoke-only or combination detection. Smoke-only models can be suitable when carbon monoxide is covered elsewhere, but a combination alarm puts both sensors in one housing.
Sensor type also affects the comparison. The First Alert and hardwired Kidde use ionization sensing, while the 10-year Kidde, X-Sense, SITERWELL and Heiman models use photoelectric sensing.
Combination models may add an electrochemical CO sensor.
If you're replacing an existing alarm, compare the brand and interconnection requirements. Our guide to Kidde smoke detectors vs First Alert explains why a replacement is not always a simple brand swap.
For more terminology, read smoke detector vs smoke alarm. If you are planning a new setup, use how to choose a smoke detector to work through placement, sensor and power questions.
1. First Alert BRK SMI100-AC Hardwired Smoke Detector
First Alert BRK SMI100-AC Hardwired Smoke Detector: Best for 6-alarm hardwired coverage
- 6-pack
- 120-Volt AC power
- 9-volt battery backup
- Interconnects up to 18 compatible devices
This 6-pack suits homes that need several hardwired alarms with battery backup. Its single test and silence button and interconnect capability support a coordinated setup.
Pros
- 6 alarms in one pack
- Battery backup included
- Interconnectable
Cons
- Hardwired installation
- Ionization sensor
The First Alert BRK SMI100-AC is the best fit when you need 6 hardwired smoke alarms in one setup. Each alarm uses 120-Volt AC power and includes a 9-volt battery backup for power outages.
Its ionization sensor is intended for fast-flaming fires. The alarms have a single button for testing and silencing, an 85 dB alarm and tamper-resistant locking pins.
The system can interconnect up to 18 compatible devices, including up to 12 smoke alarms and 6 other compatible devices. If one connected unit triggers, the other connected alarms can sound too.
This is not a voice smoke alarm, so it cannot announce whether the warning is smoke or carbon monoxide. Choose it when hardwired coverage and a 6-pack matter more than spoken alerts.
The side-load battery compartment keeps replacement access straightforward. The box includes 6 alarms, 6 9-volt batteries and 6 mounting brackets with hardware.
2. Kidde Smoke & Carbon Monoxide Detector
Kidde Smoke & Carbon Monoxide Detector: Best for hardwired voice alerts
- Smoke and CO detection
- Voice warnings
- 120VAC power
- 2-AA battery backup
The hardwired Kidde combines smoke and carbon monoxide detection with spoken warnings. It can interconnect with up to 24 Kidde devices within the stated initiating-device limits.
Pros
- Separate fire and CO voice warnings
- Hardwired with battery backup
- Interconnects with Kidde devices
Cons
- Requires hardwired installation
- Ionization sensor
The hardwired Kidde is the best voice smoke alarm here for a home that needs smoke and carbon monoxide detection with battery backup. It uses 120VAC power and 2-AA batteries during a power failure.
Its voice alerts identify the condition with messages such as “Fire! Fire!”, “Warning!
Carbon Monoxide!” and “Low Battery!” That direct wording is more specific than a siren alone.
The unit uses ionization sensing for smoke and has an 85 dB alarm. Its Test-Hush feature silences the unit for about 9 minutes, which can help when a non-emergency alarm needs attention.
It can interconnect with up to 24 Kidde devices, with the stated limits for initiating devices. Confirm that your existing alarms are compatible before building around this model.
This 2-pack suits a hardwired replacement project or a small home that needs more than one combination alarm. It includes batteries and brackets.
Placement matters for any combination alarm, so check local requirements and the product instructions for each level and near sleeping areas. Testing after installation helps confirm that the voice messages, alarm and interconnection are working as expected.
3. X-Sense Smoke Detector
X-Sense Smoke Detector: Best for standalone smoke coverage
- Photoelectric sensor
- Sealed 10-year battery
- One-button hush and self-test
- No-wire installation
This standalone X-Sense model suits rooms that need simple photoelectric smoke detection without wiring. It does not provide voice alerts, wireless interconnection, Wi-Fi or app alerts.
Pros
- 10-year sealed battery
- Photoelectric sensing
- Easy no-wire installation
Cons
- No voice alert
- Standalone only
The X-Sense SD2J0AX is best for a room that needs standalone photoelectric smoke detection without wiring. Its sealed lithium battery is designed to power the alarm for up to 10 years.
Photoelectric sensing can help reduce nuisance alarms from everyday cooking fumes and steam. The one-button control handles self-tests and silence functions.
This model is not a voice smoke alarm. It also does not support Wi-Fi, app alerts, a base station or wireless interconnection, so it works independently from other alarms.
The compact 4.8 in by 4.8 in by 1.8 in housing suits bedrooms, hallways, living rooms and basements. The box includes the alarm, user manual, screws and anchor plugs.
Choose this model when a simple smoke-only alarm is enough. Select a combination model instead if you also need carbon monoxide detection.
Daily care is simple because there is no routine battery replacement during the stated battery life. You should still test the alarm at the intervals in its instructions and replace the complete unit when it reaches end of life.
4. X-Sense Smoke Detector Carbon Monoxide Detector Combo
X-Sense Smoke Detector Carbon Monoxide Detector Combo: Best for standalone smoke and CO
- Photoelectric smoke sensor
- Electrochemical CO sensor
- Sealed 10-year battery
- LCD display
The SC07 combines smoke and carbon monoxide detection in a standalone alarm. Its LCD display and 85 dB alarm help communicate status, but it does not support voice alerts or wireless interconnection.
Pros
- Smoke and CO in one unit
- 10-year battery
- LCD display
Cons
- No voice alert
- Standalone only
The X-Sense SC07 is a strong choice for standalone smoke and carbon monoxide coverage with a 10-year battery. It uses a photoelectric smoke sensor and an electrochemical CO sensor in one alarm.
The photoelectric sensor responds to slow-smoldering fires and can help reduce cooking-related false alarms. The electrochemical sensor is designed to detect carbon monoxide, while the LCD display gives additional status information.
This model does not provide voice alerts. It also does not support wireless interconnection, Wi-Fi or a base station, so it is better for independent rooms than a linked alarm network.
Installation uses a mounting bracket, screws and anchor plugs. The 85 dB alarm gives an audible warning, and the sealed lithium battery avoids routine battery replacement during its stated life.
Pick the SC07 when smoke and CO coverage matter more than spoken warning messages.
It suits a bedroom, hallway or landing where one combination alarm can cover both hazards without wiring. Check the mounting space and follow the instructions for placement, testing and end of life replacement.
5. Kidde Smoke & Carbon Monoxide Detector
Kidde Smoke & Carbon Monoxide Detector: Best for 10-year battery voice alerts
- Smoke and CO detection
- Photoelectric and electrochemical sensors
- 10-year lithium battery
- Spoken hazard warnings
This Kidde combination alarm gives voice warnings without hardwiring. It identifies smoke, carbon monoxide and end-of-life status with spoken messages.
Pros
- No battery replacement during stated life
- Smoke and CO detection
- Voice warnings
Cons
- No hardwired power
- Single alarm
The Kidde p3010cu is the best 10-year battery voice alarm for buyers who want smoke and CO detection without hardwiring. It uses photoelectric sensing for visible fire particles and an electrochemical sensor for carbon monoxide.
Its spoken warnings identify “Fire! Fire!”, “Warning!
Carbon Monoxide!” or “Replace Alarm!” when the alarm reaches the end of its life span. An 85 dB alarm and flashing red LEDs add audible and visual warnings.
The 10-year lithium battery removes routine battery changes and keeps the alarm operating during a power failure. The Test-Hush button can silence false alarms for about 8 minutes.
This is a single combination alarm, so it suits one room or a gradual replacement plan. Install combination alarms on each level and near bedrooms according to local requirements and the product instructions.
The voice messages are a practical advantage for distinguishing smoke from carbon monoxide without decoding beeps. That clarity can help during a stressful moment, especially for visitors or anyone less familiar with alarm signals.
Care is mainly a matter of testing and listening for the end of life message. When the alarm announces “Replace Alarm!”, the complete unit should be replaced rather than treated as a battery change.
6. SITERWELL Smoke Detector
SITERWELL Smoke Detector: Best for interconnected photoelectric alarms
- Photoelectric sensor
- 120V AC power
- Replaceable 9V backup battery
- Interconnects up to 12 alarms
This SITERWELL model fits a hardwired interconnected smoke system that favors photoelectric sensing. It has audible and visual alerts but does not provide spoken voice warnings.
Pros
- Photoelectric sensor
- Interconnects up to 12
- Replaceable backup battery
Cons
- No voice alert
- Hardwired installation
The SITERWELL GS562A is best for hardwired interconnected photoelectric smoke coverage. It uses 120V AC power and includes a replaceable 9V backup battery for outages.
Its photoelectric sensor is intended to identify slow-smoldering fires. An 85 dB alarm and flashing red LED provide sound and visual warning when smoke is detected.
The unit can connect to up to 12 smoke detectors, allowing alarms to sound together when one unit triggers. It has a Test/Silence button for routine checks and temporary noise suppression.
This model does not include a spoken voice warning or carbon monoxide sensor. Choose it when a linked smoke-only system is the priority, especially in a home that already has separate CO protection.
The polycarbonate housing measures 5.68 in by 5.68 in by 1.5 in. Hardwired installation means you should confirm the existing wiring before choosing it.
For an interconnected setup, compatibility and placement should be planned room by room. Test after installation to confirm that each alarm sounds when another unit triggers, and keep backup batteries in place for power failures.
7. SITERWELL Hardwired Smoke and Carbon Monoxide Detector
SITERWELL Hardwired Smoke and Carbon Monoxide Detector: Best for wired or wireless combo systems
- Smoke and CO detection
- Voice alert
- 2-AA battery backup
- Wired or wireless interconnection
This SITERWELL combo gives households more connection choices than a standard hardwired alarm. It combines smoke and CO detection with voice warnings and self-check functions.
Pros
- Smoke and CO voice alerts
- Wired or wireless connection
- 2-AA backup
Cons
- Larger 6.1 in dimensions
- Lower score for less clear setup fit
The SITERWELL GS886F is best when you want smoke and CO detection with wired or wireless interconnection. It uses AC/DC power with 2-AA battery backup and can connect up to 12 detectors.
Its voice alert identifies whether the warning relates to smoke or carbon monoxide. The audible alarm exceeds 85 dB, giving the voice message a loud alarm signal to support it.
The unit also has a self-check function and a stated 10-year sensor life. Wired interconnection is recommended for stability, but the model supports wireless connection when wiring is not the preferred route.
This combination alarm is larger than several battery models, measuring 6.1 in by 6.1 in by 1.65 in. Check the mounting space before choosing it for a replacement.
Choose it when a voice warning and flexible interconnection matter more than a compact housing. Its smoke and CO coverage can reduce the need for separate alarm housings in the same area.
8. Heiman smoke detector carbon monoxide detector combo
Heiman smoke detector carbon monoxide detector combo: Best for compact sealed-battery combo coverage
- Photoelectric smoke detection
- Electrochemical CO detection
- 10-year sealed battery
- 85 dB alarm
The Heiman combo suits buyers who want compact smoke and CO coverage without wiring. It provides an audible alarm and LED indicator, but the features do not include a spoken voice warning.
Pros
- 10-year sealed battery
- Compact 4.76 in diameter
- Smoke and CO sensors
Cons
- No voice alert
- Standalone battery model
The Heiman combo is best for compact smoke and CO coverage with a sealed battery. It uses photoelectric smoke detection and electrochemical carbon monoxide detection in a 4.76 in diameter housing.
Its 10-year sealed lithium battery avoids routine battery replacement. The 85 dB alarm, LED indicator and test/silence button give clear audible and visual status.
This model does not provide a spoken voice alert. It is a better match for buyers who want smoke and CO detection in one battery-powered unit without needing a voice message.
The manufacturer describes placement guidance that keeps the alarm 10 ft from cooking areas, 3 ft from air-conditioning vents and bathroom doors, and 4 in from walls. Follow the product instructions and local code for the final location.
Choose this model when a compact combination alarm is more important than interconnection or voice alerts.
The smaller diameter can help where ceiling or wall space is tight, but secure mounting still matters. Use the included bracket as directed, test the alarm after fitting, and replace the complete unit at end of life.
9. SITERWELL Siterlink Smoke Detectors 10 Year Sealed
SITERWELL Siterlink Smoke Detectors 10 Year Sealed: Best for bilingual voice alerts
- Photoelectric sensor
- 10-year sealed battery
- English and French voice alerts
- One-button test and silence
This Siterlink alarm is the clearest fit for bilingual households that want spoken smoke warnings. Its photoelectric sensor and sealed battery simplify routine care.
Pros
- Bilingual voice alerts
- 10-year sealed battery
- Photoelectric sensor
Cons
- Single-pack model
- Smoke detection only
The SITERWELL Siterlink is the best choice for bilingual voice alerts. It uses a photoelectric sensor, a 10-year sealed battery and spoken warnings in English and French.
Its one-button operation supports testing and silencing. The 6.1 in by 6.1 in by 1.65 in housing needs enough wall or ceiling space for secure mounting.
This model provides smoke detection only. It does not replace a separate carbon monoxide alarm unless your home has CO protection elsewhere.
The sealed battery simplifies routine care because there is no regular battery replacement. Its voice alerts can help bilingual households understand a warning without relying only on the sound pattern.
Choose it when language access is the main reason for buying a voice alarm. For smoke and CO in one device, compare the SITERWELL GS886F or one of the Kidde combination alarms instead.
Language access can matter for guests, children, older adults and anyone who may be asleep or under stress. A spoken warning in a familiar language can make the response clearer than an alarm tone alone.
Check that the chosen language setting matches the household before testing the alarm. Also confirm that smoke coverage is complete on each level and that carbon monoxide protection is handled by another alarm where needed.
Are voice smoke alarms worth choosing?
Voice smoke alarms are worth considering when you want the warning to name the hazard. Kidde models say whether the condition is fire, carbon monoxide or low battery, while SITERWELL models add voice information to combination or bilingual use.
A voice feature does not remove the need to check sensor type, power source or placement. A photoelectric standalone alarm may suit one room better, while a hardwired combination alarm may suit a full home replacement.
If you also want a phone notification, compare these picks with the best smoke detector that alerts your phone. Phone alerts and local voice alerts solve different parts of the warning problem.
The main value of voice alerts is clarity during an alarm. A spoken message can tell people which hazard is present, which can make it easier to decide how to respond and where to go.
That clarity is useful in a busy or noisy home, and in a home with children or visitors who have not learned alarm patterns. It can also help when an alarm sounds at night and people are still waking up.
Voice alerts have limits. They do not improve sensor accuracy by themselves, and they do not replace correct placement, interconnection or regular testing.
A voice alarm in the wrong location can still be less useful than a standard alarm in the right location.
Power source is another key trade off. Hardwired voice models can keep working with battery backup and link to other alarms, but they need wiring and compatible devices.
Battery voice models are easier to fit in more rooms, yet some are standalone and will not sound together.
Sensor choice should match the hazards in each room. Photoelectric sensing suits slow smoldering fires and may reduce some cooking nuisance alarms, while ionization sensing targets fast flaming fires.
Combination models add carbon monoxide detection, which smoke only alarms cannot provide.
If you want spoken hazard information and the model covers the right hazards in the right places, a voice alarm is worth choosing. If your priority is a linked hardwired system, a compact housing or a specific sensor type, a non voice model may still be the better overall fit.
How should you maintain a smoke detector with voice alert?
Test each alarm with its test button after installation and at the intervals in its instructions. Keep the area around the alarm clear, and respond to low battery or end of life messages promptly.
Sealed 10-year batteries reduce routine battery changes, but they do not make the alarm permanent. Replace the complete unit when it reaches its stated end of life or when instructions require replacement.
For hardwired systems, confirm that backup batteries are installed and connected alarms are compatible. First Alert and Kidde models have different interconnection details, so do not assume every brand can connect to every other brand.
If you are comparing First Alert models, read First Alert SC9120B vs 9120B and First Alert SC9120B vs SMICO100-AC before replacing a wired unit.
Good placement is part of maintenance as well as installation. Keep alarms away from steam, cooking fumes or strong airflow that can cause nuisance alarms, following distance guidance in the product instructions.
Dust and humidity can affect performance over time. Follow care guidance for each model, and do not paint over an alarm or block its sensing openings.
When a voice alarm announces low battery or end of life, treat the message as a prompt to act. A low battery warning usually means battery power needs attention, while an end of life message means the alarm itself should be replaced.
For interconnected systems, test the links as well as individual alarms. After installation or replacement, confirm that a trigger in one location can sound connected alarms elsewhere.
Keep a simple record of installation dates for battery powered alarms. That makes it easier to track when a sealed battery unit approaches its stated end of life and needs full replacement.
Final choice: which voice smoke alarm should you buy?
The best smoke detector with voice alert for most battery-powered homes is the Kidde 10-Year Battery model. Pick the hardwired Kidde if you need 120VAC power, battery backup and Kidde interconnection, or choose SITERWELL if wired and wireless connection options are important.
Choose the Siterlink for English and French voice alerts. Choose X-Sense or Heiman when photoelectric or combination detection matters more than spoken messages, and confirm placement, wiring and local requirements before installation.
A good final check is to list the hazards and rooms you need to cover. Smoke only alarms are enough in some locations, but combination alarms are safer where carbon monoxide could also be present and is not covered elsewhere.
Next, match the power source to the room. Hardwired models suit homes with suitable wiring and a plan for interconnection, while sealed battery models suit simpler replacements and rooms without wiring.
Then check the details that affect daily use. Sensor type, voice language, alarm level, mounting size and end of life replacement all influence whether an alarm will work well in your home.
Avoid mixing brands in an interconnected system unless compatibility is confirmed. A linked system only helps if the alarms are designed to work together and sound together when one triggers.
Test every alarm after fitting and follow the care schedule in its instructions. That final step confirms the voice messages, alarm and any interconnection are ready to use.
Our top 3 picks at a glance
-
1
Best for 6-alarm hardwired coverage
First Alert BRK SMI100-AC Hardwired Smoke Detector
9.6/10 our score
See it on Amazon -
2
Best for hardwired voice alerts
Kidde Smoke & Carbon Monoxide Detector
9.6/10 our score
See it on Amazon -
3
Frequently asked questions
What is the best smoke detector with voice alert?
The best smoke detector with voice alert depends on your wiring and hazard coverage. The Kidde 10-Year Battery model suits homes that want smoke and CO warnings without hardwiring.
The hardwired Kidde is better for interconnected systems, while SITERWELL adds wired or wireless connection options.
Are voice smoke alarms better than regular alarms?
Voice smoke alarms can make the warning easier to understand because they identify smoke, carbon monoxide or low battery conditions with spoken messages. A regular alarm can still provide effective audible warning, so compare the sensor type, power source, placement and interconnection needs before choosing.
Does a voice smoke alarm detect carbon monoxide?
Only combination models detect carbon monoxide. The Kidde voice models, X-Sense SC07, SITERWELL combo and Heiman combo pair smoke detection with CO detection.
A smoke-only voice alarm, such as the Siterlink model, does not replace a carbon monoxide detector.
Do voice smoke alarms need hardwiring?
No. Voice smoke alarms are available in hardwired, battery-powered and wired-or-wireless models.
The hardwired Kidde uses 120VAC with 2-AA backup, while the Kidde 10-Year Battery model uses a sealed lithium battery.
Check the power source before replacing an existing alarm.
Where should a smoke detector with voice alert be installed?
Install alarms according to local code and the product instructions, with coverage on each level and near sleeping areas. Keep smoke alarms away from routine cooking fumes, steam and strong airflow when the instructions call for separation.
Test each alarm after installation and follow its care schedule.
