What is the difference between hardwired and battery detectors?

Hardwired detectors are wired into your home's power with a battery backup, so they keep working during an outage and do not rely on you remembering to change batteries. They can also be interconnected, which means when one senses smoke or carbon monoxide, every alarm in the house sounds. That extra warning time matters most at night.

How many detectors does my home need?

Code calls for a smoke detector inside every bedroom, outside each sleeping area, and on every level of the home, including the basement. Carbon monoxide detectors are required near sleeping areas and on each level too. We map out full coverage during the walkthrough so nothing is missed.

Why do I need carbon monoxide detectors?

Carbon monoxide is invisible, odorless, and dangerous, and it comes from anything that burns fuel, like furnaces, water heaters, and attached garages. You cannot detect it without an alarm. If your home has any gas appliances or an attached garage, CO detectors are essential.

What are Maryland smoke detector requirements when selling a house?

Maryland requires hardwired, interconnected smoke alarms with battery backup in new installations, and home sellers must meet current smoke alarm standards before transfer. Many older Baltimore homes still have battery-only units or expired detectors. We assess your home against current requirements, install hardwired interconnected alarms where needed, and make sure you are compliant before closing.

Can you replace my old detectors and keep them interconnected?

Yes. Detectors expire, usually after about ten years. We replace old units, keep or add interconnection so they all sound together, and make sure the new system is fully tested before we leave.

Smoke Detector Installation Baltimore MD

Detection That Buys You Time

A working smoke and carbon monoxide system is the cheapest life-safety upgrade in your home. The trouble is that many Baltimore homes still run on aging, battery-only alarms, with units missing from the rooms that need them most — a problem that becomes urgent when Maryland smoke detector requirements for selling a house come into play at closing. RCH Electric installs hardwired, interconnected detectors that give your family the earliest possible warning.

We install hardwired smoke detectors, carbon monoxide detectors, and combination units, all interconnected so a single alarm sounds every device in the house. Each one gets battery backup, so it keeps working when the power does not. We place detectors to code in every bedroom, outside each sleeping area, and on every level of your home.

If your alarms are chirping, expired, or simply not in every room they should be, we will map full coverage, give you an upfront price, and install a system you can count on. Contact us to schedule a visit.

What's Included

Every job follows a clear scope of work we review with you up front — so you know exactly what you are getting.

Hardwired smoke detector installation

Carbon monoxide detector installation

Combination smoke & CO units

Interconnection of all alarms

Battery backup setup

Replacement of old or expired units

Correct placement per code

Bedroom & hallway coverage

Per-level detector placement

Old detector removal & disposal

Full system testing

Walkthrough of how it works

How We Get Started

Getting started is straightforward. We designed the onboarding process to be as low-effort as possible on your end.

Walk the Home

We check what you have, where the gaps are, and what code requires for your bedrooms, hallways, and each level of the home.

Clear Plan & Price

You get a simple plan for full coverage and an upfront price. We explain hardwired versus interconnected so you know what you are getting.

Clean Installation

We mount and wire each detector, interconnect them so one alarm triggers all, and add battery backup so they work even in an outage.

Test & Walk You Through

We test every unit, confirm the whole system links together, and show you how to test and maintain it going forward.

Smoke & Carbon Monoxide Detectors