Windows and doors:
As most of this surface is taken up by the walls and the roof, it is here that most of the heat is lost. Gaps around window and door frames allow cold air to get in and warm air to escape, and even your letterbox can allow significant heat to escape.
Typically, the best place to start is in the attic. In the winter, the greatest heat loss is usually to the attic – and it's not all about insulation. Although cellulose insulation far outperforms all other attic insulation on the market, it plays a very important part in keeping heat in the home.
Skin: Nearly 85 percent of heat loss occurs through the skin via conduction, convection, radiation, and sweat evaporation.
Gaps and holes in your home provide entryways for outside air to enter. These gaps can be spotted quickly… look for gaps where walls and floors meet (especially on exterior walls), around electrical outlets, and where fans and recessed lighting connect to the ceiling.
Seek Thermal is the best way to experience and visualize thermal energy while on the go, at work, indoors, or in the outdoors. With this free app and a Seek thermal imaging camera, you can quickly and accurately detect, inspect, measure, and visualize thermal energy from your smartphone and tablet.
Houses will always lose heat. The colder the outside temperature or the stronger the wind, the greater the amount of heat lost through the walls, windows, doors and roof of your home ('the building fabric'). In general terms an older building will lose proportionately more heat than one built more recently.
Cold is more deadly than heat, even in the hottest parts of the world. There is a long list of other studies that provide similar results. A study across 854 cities in Europe found that cold-related deaths were around ten times higher than heat-related ones.
Why does that cold bottle of water feel so amazing after a blazing summer workout? You're hot, the water and bottle are cold. Simple, right? Turns out there are four methods for body heat loss: radiation, conduction, convection and evaporation.
Cracks in walls, doors, and windows are the top cause of house heat loss. If you notice such cracks, seal them with caulk or foam (whichever is appropriate), and install weather stripping around doors and windows. A quick fix for drafty windows or sliding glass doors is installing heavy drapes.
The most accurate thermographic inspection device is a thermal imaging camera, which produces a 2-dimensional thermal picture of an area showing heat leakage. Spot radiometers and thermal line scanners do not provide the necessary detail for a complete home energy assessment.
An estimated 25% of all heat loss occurs through the attic or roof of a home. Cracks or holes in an attic, along with improperly placed vents, allow for significant amounts of heat loss through the attic space. In addition, improper ventilation in attics leads to even more heat escaping.
An average home may have a Heat Loss rate of 4 hours (to lose 1°C) whereas a well insulated home may take 9 hours to lose that same 1°C.
When lying in bed trying to fall asleep, your body temperature decreases to initiate sleep. Having a temperature between 60 and 67 can help to facilitate this. The best temperature to sleep is cooler rather than warmer. Temperatures above 75 degrees and below 54 degrees can disrupt a person's sleep.
The hottest place on Earth is Furnace Creek in Death Valley, California (USA), where a temperature of 56.7°C (134°F) was recorded on 10 July 1913.
Warm air can escape from your home in all directions – including the roof, walls, floor, windows and doors – meaning lots of the energy you pay for can go to waste. The first step is to understand where your home may be losing heat…
Cracks, holes, and gaps around the home can lead to a significant amount of heat loss. Especially around areas like your windows, it's estimated that poor air sealing can account for up to 30% of the air leaks in your home!
Step 1: Download a Thermal imager App
The first step in turning your smartphone into a thermal imager is to download a thermal imager app. There are several options available in the App Store or Google Play, or you can scan the QR code in the manual to get the APP package.
Missing insulation allows either heat or cold to infiltrate, which shows as hot or cold spots on your walls or ceiling when viewed by a thermal camera. You can easily detect areas of missing insulation by walking around your house with a thermal imager and looking for temperature differences.