The time has come for the annual renewal of insurance for our holiday home. One of the conditions raised by the insurer is that when the property is not occupied, we should maintain a minimum temperature of 15 degrees celsius. Presumably the logic behind this is to prevent water pipes freezing in the winter and causing water damage when it thaws.
As a matter of course, we leave the gas central heating running on a low setting when there are low temperatures around. We've also insulated the condensate pipe from the gas central heating boiler and installed an electric thermostatic heating wire under the length of the external condensate pipe. This heater is triggered if the temperature drops below 5 celsius, preventing a build up of ice in the condensate pipe. If the pipe becomes blocked with ice at the drain outlet, water can back up the pipe causing the central heating boiler to turn itself off.
Generally the insurers insist the property is inspected once a week during periods of low occupancy. One of the companies was looking to have daily inspections, which in our case is not feasible. There's a risk that a fault develops in the central heating leading to a loss of heating while the building is not attended. This would lead to the temperature dropping below the 15 degree threshold.
We decided we needed to find a solution to this risk. After some research we found a temperature monitor/sensor which can provide alerts via the cottage broadband internet. The result is fairly low cost and we can check the health of our premises via a web browser or on a smartphone App. It also can raise automatic SMS/Email alerts if a threshold is crossed.
- Temperature (Celsius. Fahrenheit is possible),
- humidity (percentage),
- Light level (lux),
- supply battery voltage,
- WiFi signal strength.
The sensor we are using can also monitor vibration affecting the device, so it can detect people causing vibration. These readings are monitored every 15 minutes (variable) and we can produce analyses over a time period. This data is held in a central database and can be interrogated via a web browser or smartphone app. If necessary we can prove to the insurance company that remote checks are performed.
We can also advise guests on the actual temperature/humidity during their stay at our cottage.
We now offer this as a rental service, to ourselves and others, at a modest cost of £10/month. It is a fraction of the cost of a single visit from our home to the holiday cottage. Alternatively people can buy the sensors, and register/sign on to the Internet of Things (IoT) to monitor their properties. There are more expensive versions which can report via GSM service. If you to buy one here's a link to an Amazon page, we have no financial interest in this link.
Edit 14th Nov 20
After a couple of days trial, the results are looking good. No cabling is necessary to install as it can be battery powered and connects via WiFi. It was just a matter of downloading a phone App and setting up the WiFi Router password on the sensor. The following images give a snapshot of some of the data available remotely via a web browser.