Hardwired systems use door and window switches and sensing devices designed to connect with either 2 or4 conductor wiring. These devices are generic, and can connect to nearly any brand of alarm system. Only the keypads are proprietary, or brand-specific.
Wireless alarm systems must use transmitters for sensors. These communicate by radio, and only “speak the same language” as the system they were designed for. If you want (or need) to change the alarm system, all the transmitters must also be changed.
Most people will install an alarm system, then forget about it. One more item crossed off the to-do list.
When will they think about replacing it? When something breaks.
The most common thing to fail on most alarm systems is a door or window sensor
(Reed Switch). For a hardwired system, this means replacing an inexpensive switch and magnet. For a wireless system, it may mean a new transmitter. If the transmitter is no longer in production, you’re looking at replacing the entire system.
We have always recommended a hardwired home security system over a wireless system, provided that wiring is an option. If wireless is the only choice, go for it. We install wirless systems, and most work flawlessly. But if your home has been pre-cabled during construction, or if space is available, I advise choosing a hard wired security system. Here are my biggest reasons:
Hard Wired Alarm Systems
Remote controls for garage doors, irrigation systems, gates
RF remotes for whole-house audio
Remote controls for wireless toys
And these are just the intentional sources of radio signals.
There is also plenty of unintentional RF energy being generated as a by-product of normal operation:
Modern Smart TV’s
Pay TV units
Dimmers and low-voltage home lighting
Home automation systems
Anytime signals must travel across open space, they can be compromised. As much as wireless technology has improved, you can’t change the fact that it’s wireless. Radio, basically… and subject to all the possible problems with radio reception. Think: Cell phone…!
Radio signals can be blocked, absorbed, or reflected by objects in your home. Metal file cabinets, and some wall coverings can create dead spots. Even some building materials can cause trouble, like steel re-bar.
While dead spots can mean little or no signal, the flip side can be just as bad. All kinds of devices use radio, and they can interfere with each other.
The RF (radio frequency) spectrum has been over-crowded for many years. This spectrum is sliced into bands allocated to all kinds of equipment, It is regulates it fairly tightly. Unfortunately, interference can still occur. Consider all the wireless equipment we use every day:
These things aren’t usually an issue for an alarm system. Unless the house is very large, or coverage must extend to detached structures like garages and workshops, the “average” wireless alarm system will be installed with little or no trouble.
However, changes to the home after installation can cause problems. Who knows what new sources of RF interference may wind up in your home in the future? A child’s wireless toy? A new pay TV box?
To put it another way, which would you prefer: a hardwired connection to your desktop computer, or a wireless one? I’ve used both, and the hardwired connection has never gone down…. The same thinking can be applied to your security system.
Cost of Alarm Equipment
Hardwired home security system equipment is cheaper than wireless alarm devices. Hardwired sensors don’t have to transmit RF signals, and they don’t need an on-board battery. This leads to a lower cost for the equipment, in a given size house.
The other half of the equation is labor. If wires are difficult to run, the money saved on the equipment is spent on getting the installation completed.
Getting a quotation is the best way to know which side of the fence your home is on. We are more than happy to come to your house, count up doors and windows, suggest locations for motion sensors, etc., and propose a system for you. We can tell you if a hardwired home security system is the best way to go, and give you a good idea on the price.
If a hardwired system is doable, and is priced about the same as the wireless equivalent, lean toward hardwired. Over time, the cost of one or two wireless battery changes alone will offset any minor difference in the initial cost. Do be sure that each type of system offers the same level of protection; otherwise price comparisons are meaningless.