What they are good at
Detection speed, which is the single most valuable variable in vacant property. A temperature sensor that alerts you when the house drops below a threshold turns a heating failure from something discovered on the next visit into something discovered within an hour.
That is a genuine improvement and the devices are inexpensive. For a property that will be empty through an Alberta winter, temperature monitoring is probably the highest value-per-dollar addition available.
- Temperature sensors — earliest possible warning of a heating failure
- Leak sensors at known risk points: water heater, laundry box, under sinks, sump area
- Smart thermostats you can check and adjust remotely
- Power-loss alerts, which catch the outage behind a failed freezer
- Automatic water shut-off devices — the only category that acts rather than reports
What they cannot do
This is the part the marketing skips. A sensor produces an alert. An alert on your phone in Arizona at 3 AM is information, not a resolution.
- It cannot close a valve, unless you have specifically bought a device that does
- It cannot clear snow off a furnace vent termination
- It cannot photograph a ceiling stain so you can see whether it is growing
- It cannot let a plumber in
- It cannot notice the things nobody thought to instrument — a branch through a window, a door left open after a showing, evidence of entry, a stain that appeared on a wall with no sensor near it
The failure modes nobody plans for
Every connected device depends on a chain: mains power, the internet connection, the router, the hub, the cloud service, the app, and your phone having signal. A vacant property loses that chain more often than an occupied one, because nobody notices when the router needs power-cycling.
Batteries are the other one. Sensors report low battery, but a low-battery notification arriving among a hundred others while you are travelling is easy to miss, and a dead sensor is indistinguishable from a quiet house.
The genuinely dangerous version is a false sense of security: an owner who reduces visit frequency because the house is "monitored", when the monitoring stopped reporting six weeks ago.
A sensible arrangement
- Temperature sensor in the coldest part of the house, not the hallway
- Leak sensors at the water heater, laundry box, under sinks and at the sump
- A smart thermostat with a hard minimum set, and away mode checked
- An automatic shut-off device if the water is staying on
- Fresh batteries in everything before you leave
- A written note of what is installed, where, and what it should read normally
- Someone attending who knows the devices exist and can check them
- Visit frequency set on the assumption the sensors might be offline
Where this is going
The direction of travel is obvious: cheaper sensors, better integration, and eventually property care that blends continuous data with periodic physical attendance rather than treating them as alternatives.
What will not change is that a house is a physical object in weather. Something has to be able to walk into the mechanical room, and no amount of instrumentation removes that.
Related questions
How often should a vacant home be checked?
The honest answer is that it depends on the season, the property and — critically — what your own insurance policy says. There is no universal standard, and anyone who gives you a single number without asking about your policy is guessing.
That said, the practical logic is straightforward. The damage from most vacant-property failures is proportional to how long they run undetected, so the visit interval is effectively a cap on your worst-case outcome. A leak found after three days and the same leak found after three weeks are very different events.
In practice, weekly is the most common cadence for an Alberta property during the heating season, with owners increasing to twice weekly or every 72 hours during extreme cold. Through summer, weekly or biweekly is common. Properties with known risk factors — poly-B plumbing, an aging hot water tank, a history of basement water, or no water shut-off — warrant more frequent visits than a newer, lower-risk property.
The number that actually matters is the one in your policy. Many policies contain a required check interval during extended absences, and some specify who must perform it. Call your insurer or broker and ask directly before you leave.
What happens if my furnace fails while I am away?
The building starts cooling at a rate determined by its insulation, air sealing, the outdoor temperature and the wind. A well-built modern house in moderate cold may lose only a few degrees a day. An older house during a −30 °C wind event can approach freezing internally within a day or two.
The consequence is not a cold house — it is frozen plumbing. Once interior temperatures at vulnerable locations reach freezing, supply lines begin to freeze, and the failure typically shows itself when the ice thaws and water starts running.
This is why visit frequency during cold events matters more than visit frequency generally. The difference between finding a heating failure after two days and after two weeks is the difference between a service call and a restoration project.
On a monitored property the sequence is: the failure is found on a visit, documented, you are contacted, and a licensed HVAC contractor is dispatched under whatever authorisation you have set in advance. Setting that authorisation before you leave is what allows it to happen at 8 PM on a Sunday rather than after an email exchange across time zones.
Connected temperature sensors can shorten detection further and are a sensible supplement — though they only tell you something is wrong, and somebody still has to go to the property.