The Kidde i12040 is a 120V AC hardwired interconnect ionization smoke alarm with a prominent Hush feature for silencing nuisance alarms. A single button operates both Hush and test functions for convenient operation. The included 9V battery backup maintains protection during power outages. It can operate as a standalone unit or as part of an interconnected system. This is a legacy model replaced by the Kidde 20SAR.
What is the Hush feature on the i12040?
The Hush feature on the i12040 temporarily silences the alarm and any interconnected alarms during nuisance events such as cooking smoke or steam. Press the single Hush/Test button to activate it. The alarm will automatically reset after a few minutes if smoke levels return to normal.
Does the i12040 support hardwired interconnect?
Yes. The i12040 supports hardwired interconnect with up to 24 compatible Kidde devices, of which 18 can be initiating devices. It can also function as a standalone alarm without being interconnected.
Does the i12040 have battery backup?
Yes. A 9V battery is included and provides backup power during outages. Replace the battery annually or when the low battery chirp sounds.
How do I test the i12040?
Press and hold the single Test/Hush button to test the alarm. The alarm will sound briefly if all electronics and the horn are functioning properly.
What model replaced the i12040?
The i12040 has been replaced by the Kidde 20SAR, part of the DETECT line with enhanced photoelectric sensing, improved interconnect, and AA battery backup.
# Kidde AC Hardwired Interconnect Smoke Alarm with Hush **Model:** `i12040` **Brand:** Kidde **Category:** Smoke Alarm Hardwired > The Kidde i12040 is a 120V AC hardwired interconnect ionization smoke alarm with a prominent Hush feature for silencing nuisance alarms. A single button operates both Hush and test functions for convenient operation. The included 9V battery backup maintains protection during power outages. It can operate as a standalone unit or as part of an interconnected system. This is a legacy model replaced by the Kidde 20SAR. ## Specifications | Attribute | Value | |---|---| | Product Type | Smoke Alarm | | Alarm Type | smoke | | Sensor Smoke | ionization | | Power Source | hardwired-ac | | Voltage | 120 | | Battery Backup | Yes | | Battery Type | 9V | | Battery Replaceable | Yes | | Voice Alerts | No | | Smart Wifi | No | | App Connected | No | | Ring Ecosystem | No | | Interconnect | Yes | | Interconnect Type | hardwired | | Wire Free Rf | No | | Max Interconnect Devices | 24 | | Max Initiating Devices | 18 | | Self Testing | Yes | | Hush Feature | Yes | | Smart Hush | No | | Strobe | No | | Egress Light | No | | Alarm Db | 85 | | Ul Smoke | UL 217 | | Warranty Years | 10 | ## What's Included - alarm unit - 9V battery - wiring harness - mounting hardware - quick install guide Source: https://www.jaspecs.com/kidde/smoke-alarm-hardwired/i12040-kidde-ac-hardwired-interconnect-smoke-alarm-hush/