heating

Unblogged September

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A depiction of the Cheshire cat on the roof of Trinity Leeds

Considering that I still haven’t written about everything we did in July and August (there’s one more blog post to follow on Thursday), then surely there’s lots more to come from what we did in September. Right?

Well, we did do quite a few things this month, but not all of them merited blogging about on their own. Diamond Geezer normally writes a summary of unblogged things each month (here’s his from August) and whilst I won’t be writing a day-by-day summary, here are some of the things we did:

Trips to Manchester

I went to Manchester twice this month. The first was for a birthday meal for Christine, and also a shopping trip. We naturally went to Afflecks, which is an indoor market focussed on alternative lifestyles and has many small businesses selling clothes, jewellery and music. It’s in an old department store which closed in the 1970s after being taken over by Debenhams (who already had a larger store nearby). It’s operated in its current format since 1982, and is a very quirky place.

My second trip was for work, attending a training session about international qualifications delivered by UK ENIC. That was held at the University of Manchester.

Trip to Leeds

We also had a shopping trip to Leeds, which also doubled up as a second birthday meal for Christine, this time with my parents. This was at Bibi’s Italianissimo, which is a huge art deco restaurant near the station. Bibi’s has been in Leeds for years and retains a reasonably good reputation for food and hospitality – especially for families.

We also went into the Corn Exchange, which is similar in some respects to Afflecks in Manchester as it’s also home to many smaller shops – a couple of which are also in Afflecks. Architecturally, the Corn Exchange is far more interesting, being as it is circular with a huge glass domed roof over the central atrium inside. It’s unsurprisingly Grade I listed.

Back to school

Our nine-year-old is back at school, and started year five – their penultimate year at primary school. Next year, we’ll need to start looking at secondary schools.

Getting cold

This time of year is when we see how long we can hold out before turning the heating on. Which turned out to be Tuesday 16th September, after a run of cold days. It warmed up again afterwards, and so the thermostat didn’t come on until it turned cold again last weekend. Normally, the heating stays on until early May.

Speaking of heating, I’ve had major issues with my Nest thermostat recently with it refusing to work with either the Google Home app or Home Assistant. Ultimately, I had to completely remove it from both, and then re-add it, to get it working again. Which is a faff because the Nest integration in Home Assistant is one of the most difficult to set up, and it’s actually gotten worse since last time as you now have to create a Pub/Sub topic too. I’m pleased that it’s working again, but you can tell Google are phasing out their Nest thermostats in Europe. It will certainly get replaced with a different system, as and when we’re ready to replace our gas boiler with a heat pump.

Radiator reflectors

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A photo of a radiator in our bathroom, with a radiator reflector next to it.

The recent cold snap, and corresponding increase in our heating bill, has meant that I’ve looked at using radiator reflectors at home. These are panels, made of reflective material, which go behind your radiators and reflect heat back into the room.

Unless you’re lucky enough to have under-floor heating, if you have central heating then your heat will most likely come from radiators hung on your walls. The heat from these radiators literally radiates out in all directions, which means that some of this heat will be going into the walls behind your radiator. Radiator reflectors redirect that heat back into your room, increasing the efficiency of the radiator.

Radiator reflectors are especially useful for radiators on external walls, as otherwise you’re potentially allowing heat to escape outside the home. Our house is around 100 years old, and we’ve been told that we can’t have cavity wall insulation, so heat loss is an issue for us.

Choosing radiator reflectors

The radiator reflectors that I bought are Radi Save from Must Have Ideas. Instead of individual panels, you get one five metre long strip of material, which you then cut down to size. Thankfully, the four radiators that I wanted to add reflectors to added up to 5.1m, so one pack was adequate; if I was to do the whole house, then two would have probably been sufficient. Each five metre pack normally costs £20, but they’re on offer for £15 each at present, plus postage.

The material is easily cut with regular scissors – you just need to measure the radiator’s width, knock maybe an inch off each end, and cut it to size. You also need to measure and cut out holes so that it can slide around the brackets. Then, just drop it in place behind the radiator, assuming your nine-year-old hasn’t filled the back of the radiator with various dropped toys. You can then attach them to the wall with double-sided tape, if you wish; I haven’t yet, as it gives us the option of storing them over summer when the radiators are off.

The market leader seems to be Radflek (sponsored link) – they will sell you panels and a kit to hang them from the radiator brackets. A pack of two panels costs £20, so they’re a little more expensive than Radi Save. However, as you would expect, there are many other radiator reflectors on sale from Amazon, including similar products to Radi Save.

Do they work?

As I write this, I have installed our radiator reflectors on two radiators – one in our bathroom, and the other in our dining room. Our bathroom radiator is small, and behind a door, and this is where we’ve seen the most benefit. The room doesn’t feel as cold as before, and there’s been less of an issue with condensation on the window since I fitted the radiator reflectors.

Also, I believe the previous owners of the house used to have a gas fire in the bathroom, where the radiator is now, however the old flue from the gas fire remains. As such, some of the heat from the radiator was being channelled out of the house through the flue. The radiator reflector seems to be preventing this now, which is great – indeed, the back of the reflector, facing the wall, was almost cold even when the radiator was on.

So yes, it feels like they’re working. I can’t back this up with my own solid data, but most product pages selling radiator reflectors seem to include images taken from thermal imaging cameras to show that they work.

Do they save money?

£15 for four radiators doesn’t seem like much, but it’s still an investment. Whether you will save money by using radiator reflectors will most likely depend on whether you have thermostatic radiator valves (TRV). These are valves on your radiator that open and close in response to how warm your radiator is; once your room is warm enough, the valves will close up and will reduce the flow of hot water into the radiator. As mentioned, radiator reflectors help by increasing the efficiency of the radiator, theoretically meaning that the radiator will warm up faster, and so that the TRV can close up sooner.

We have standard TRVs on our radiators, but it’s possible to get smart TRVs. These can be set to a specific temperature, using an app, and, if they’re from the same brand as your thermostat, can control your boiler or heat pump too. If not, then it’s possible to rig something up with Home Assistant.

If you don’t have TRVs, that doesn’t mean that you won’t save money – certainly, if you add a reflector to the radiator in the room where your thermostat is, you should still save some money. But hopefully you’ll find that your rooms are at least warmer than they were before, without burning more gas.

Can’t I just use kitchen foil?

I’ve long been aware of the suggestion that you just put some kitchen foil behind your radiators, rather than buying dedicated radiator reflectors. According to this web page, kitchen foil may work, but it isn’t likely to be as effective. It’s delicate, so tears easily, and isn’t as insulative as proper radiator reflectors.

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.