boiler

Nesting

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A photo of our Nest thermostat with the heating set to 19 C

Along with our new boiler, we also got a new thermostat – a Nest Learning Thermostat. I’d actually bought it in January, in the hope that it could be fitted to our existing 1970s central heating system. With both Christine and I being on maternity and paternity leave respectively, we were at home most of the day and so the heating was on almost constantly – I hoped that a better thermostat would cut the amount of energy required. Alas, the fitter who came to install it told us that our system was too old – he could fit it, but it would only power either the hot water or the heating, and not both at the same time.

Now that we have a more modern boiler, we could also make use of the new thermostat.

The previous thermostat also dated from the 1970s and was a basic model that, theoretically, would heat the house until it reached the set temperature and stop. But I’m convinced that it didn’t do the latter – the heating would still be on even when it was utterly roasting. With such an old system, the fault could have been in any one of several places. Either way, it’s not an issue now.

Whereas the old thermostat was upstairs, we’ve fitted the Nest in the dining room. You can install it using the standard thermostat cables to your boiler, or there’s a micro-USB socket and an AC adaptor included. We decided to go for the latter, in case we want to move it somewhere else. It’s quite easy to fit to the wall and the backplate even includes a spirit level to help you align it correctly.

The Nest offers several useful features:

  • It learns how long your heating system takes to warm up. So if you want the house to be warm by 7:30am, you tell it that, rather than telling it to come on at 7am in the hope that your house will be warm enough by then.
  • You can tell the thermostat that you are away, allowing it to maintain the house at a cooler temperature, thus saving energy.
  • Your thermostat can be managed using official apps for smartphones or tablets, or on the web.
  • It has a motion detector, so the display turns off when no-one is about. It can also turn your heating down if it detects no motion in the house for some time.
  • Integration with IFTTT and other smart home technologies.

Whilst it’s been a warm couple of weeks, thanks to the Nest our heating has only needed to be on for an average of 30 minutes per day. I’m hoping that it will save on our energy bills – my mother-in-law has one, and she credits hers for halving her gas bill.

New boiler

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A photo of our new Bosch boiler in our kitchen

In addition to a new downstairs bathroom, we’ve also invested in a new central heating boiler for our house.

This was mainly a necessity, rather than a desirable enhancement. The existing boiler dates from 1976, making it 40 years old. This is far older than most boilers – by comparison, my parents have had their boiler replaced twice in this time. If it broke down, I doubt we would have found anyone able to fix it. In which case, we would have needed a new boiler anyway, so we might as well get a new one at a time that’s convenient for us. With Christine still on maternity leave, and the weather warming up, last week seemed like a good time to do it.

The old boiler was a so-called ‘back boiler’, located in one of the chimneys in the house and with a gas fire in front; there were also two other gas fires in the house that we had removed in the summer. We also had a large hot water tank upstairs in what will be Elizabeth’s room.

Boiler installation

The new boiler is a combination boiler that provides both heating and hot water, so the old boiler, hot water tank and gas fire were all removed as part of the works. Additionally, we had to have the boiler in a different place, as it wouldn’t have fitted in the chimney and would’ve been awkward to access even if it did fit. So it’s now in the kitchen.

As it’s a newer-style condensing boiler, it should use significantly less gas than the previous boiler. Which is good – we spent a fortune over the winter as Christine was at home all day with Elizabeth during the coldest months of the year. It’s manufactured by Worcester-Bosch – one of the better makes and comes with an 8 year guarantee. There’s also a filter, to remove impurities from the water in the system, thus pro-longing the life of the boiler – that’s the black thing on the pipes in the photo.

Cost

We got two quotes for the work. The first was our current energy supplier – a large British firm specialising in Gas, who quoted us over £6000 for the work. Thankfully a local firm quoted us less than £4000, so we went with them. They managed to do the job in two days, rather than three, and we got an interest-free credit deal for two years.

As well as the new boiler, we also got a new thermostat (more on that later), and four new radiators in the downstairs rooms. One of these, in the kitchen, replaced a hugely inefficient electric radiator; the others replaced existing radiators that were removed and stored during our earlier renovations, but haven’t worked well since they were reinstalled.

Whilst the work has been costly, I’m hoping it will pay off in terms of lower gas bills, and should mean that we’re not stuck with a broken boiler in the middle of winter.