May be more economical to run for smaller households than other boiler system types according to the Energy Saving Trust.

A combination or ‘combi’ boiler system combines a water heater and central heating boiler into one compact unit. These space-saving systems are increasingly popular amongst homeowners upgrading their older central heating systems and, according to the Energy Saving Trust, may be more efficient for smaller households with a low hot water demand – when hot water is heated and stored in a separate tank, heat can be lost when it’s not used. CHARACTERISTICS OF COMBI BOILERS (one heating zone)In residential areas with low water pressure a gravity or gravity/pumped system is usually the best option. Some systems incorporate a pump to help provide greater pressure at the taps. Hot water flow depends on the cold water mains pressure, so if this is supply is lost, you will soon lose the hot water supply.

On the 2-channel programmer where you set your schedules, try setting the hot water side to off and the central heating side to on. If doing this automatically turns on the hot water side as well, this would indicate a gravity system. ADVANTAGES OF GRAVITY-FED SYSTEMS (non-pumped) Comfort mode, meanwhile, learns how your home warms up, so the heating can be turned on early to reach your desired temperature by a set time. To control your heating, the Drayton Wiser system has a wireless heating relay that connects to your boiler to turn it on and off. There are two versions of the kit available. The first has a single-channel control that’s designed for combi boilers, turning the heating on and off only. We also found it was easy to create some basic automations in the app using the Moments feature - such as turning the radiators in the lounge on, while also dimming the map connected to the Wiser smart plug to create a cozy atmosphere of an evening. App Wiser smart thermostats are compatible with most boiler makes and models, but it’s important to consider which boiler system type you have when selecting your Wiser kit. Here we’ll guide you through the most common boiler system types to help you find the ideal Wiser products to suit your home. Also try our online Product Selector to find the right kit in just a few short steps.Also known as sealed or system boiler systems, a conventional boiler system with an unvented hot water cylinder uses a hot water cylinder that’s separate to the boiler but does not require a cold water tank usually typical of vented gravity-fed systems. CHARACTERISTICS OF CONVENTIONAL BOILERS (with unvented cylinder and one heating zone) With its intuitive user interface, the Wiser Home app makes it easy to adjust your heating and hot water. Set up your app in seconds using simple step-by-step instructions. The Wiser Hub can be installed in just 20 minutes using the industry standard wall plate included. Wire into your existing cylinder thermostat for hot water control. The system is suitable for 99% of all UK boilers. HubR: Fixed wiring only, to comply with current IET regulations (BS7671); Room and radiator thermostat: No wiring required

HubR: 148mm(w) 93mm(h), 31mm(d); Room thermostat: 76mm(w), 76mm(h), 25mm(d); Radiator thermostat: 93mm(h), 51mm(dia) A distinctive feature of a gravity-fed system is four 22mm or 28mm copper pipes connected to the boiler (sometimes three pipes if an injector T is fitted, but a fourth 22mm or 28mm copper pipe will still be nearby). This is set up in the same way as regular conventional systems, but in this case the system has two heating zones being controlled by the boiler, with separate programming for each usually with two thermostats. This may be the case in larger or extended homes. CHARACTERISTICS OF CONVENTIONAL BOILERS (with unvented cylinder and two heating zones) I slightly prefer the Tado and Honeywell Evohome TRVs, which show the current temperature on their display and let you set a new target temperature.The Heat Hub is a rectangular box with two buttons. One button activates the set-up process, while the other starts the whole system heating. LEDs above the buttons glow green when these options are active. The Heat Hub should be screwed to the wall next to your boiler. The square smart thermostat has a two-inch screen that shows the current temperature of the room it’s in, as well as the desired temperature. It also displays the relative humidity and battery level, and features a flame icon to indicate if the heating is switched on. Drayton’s Wiser impressed us last year by being easy to set up and cheap to buy. This year, those two attributes still count, but the company has also made several underlying improvements, including IFTTT and Google Home support. Older systems upgraded with pumps provide better thermostatic control of the central heating and the ability to control it independently of the hot water.

Four 22mm or 28mm copper pipes connected to the boiler (sometimes three pipes if an injector T is fitted, but a fourth 22mm or 28mm copper pipe will still be nearby). Smart thermostatic radiator valves are the best way to control the temperature in your home, and they can help save a lot of money, as you only heat the rooms that you need. While most systems are very expensive, the Drayton Wiser system is comparatively cheaper, yet it remains very powerful. Design and installation

Wiser Thermostat Kit 1

Can provide good pressure in some residential areas where mains water pressure is low, particularly if the water circuit is also upgraded with pumps. The Drayton Wiser system lets you set a schedule for each thermostat, indicating a desired temperature for each room in your home at different times of the day. For example, you can set the bathroom to warm up first thing in the morning and last thing at night, if you don’t use it during the day. As already mentioned, you can override a set schedule at any time by manually twisting the top of the radiator thermostat (turning the heating on in that room for 30 minutes) or from the app, where you can choose for the heating to remain on for between 30 minutes and three hours.