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screwfix now sells these, so I expect they will be used a lot more.

If you got mains gas, then I would not touch a heat pump. If you are on a private gas tank, then a heat pump may make sense, but you will need new radiators or UFH to get the best out of it. When my parents had their supply upgraded to two phase, the DNO did not charge them, however that...

I would be looking at a solar 12v battery charger, 12v lead acid battery and 12 volt LED light. You find all the parts at a good caravan shop.

Are there any without metal screws, as otherwise the back boxes may need changing to plastic.

Yes, I believe other countries use them, but I don’t recall every seeing them for UK back boxes. However I have never made much effort to find them. Plastic back boxes, or the metal boxes with a plastic screw holder goes a long way with plastic light switches and were considered safe in the...

I think the problem is that you ask a simple question about doing a simple task. However the task is only simple and safe if the complete installation is already in a good state. However there is no simple way for you to know what state the installation is in. If when you get the system...

How much would wind/solar with a large battery storage and backup generated cost? What grants are there for solar?

Thanks IJWS15, How much “ripping apart” of the building will be needed to get these answers?

Let’s see if I can say something useful… Firstly, if your consumer unit does not have RCD protection then get the consumer unit replaced. If you think the consumer unit is OK, get an electrician in to do a safety report on the system, this should take at least half a day. (Unless you...

Before I waist people’s time getting quotes etc and someone give me some ideal of the sort of costs I am looking at. I am looking at a property where the stairs run from “back to front” and may wish them to run from “front the back”. The openings in the floors will not need changing. The...

We live in a bungalow and used to have to do the process of turning off all but one radiator to force out an air lock a few times a year. Since I have fitted a Spirovent on the feed pipe from the boiler we have had no problems (apart from refilling after doing the work). (We have long runs...

Maybe it could be done in a simple way if it was mass produced. What about a bi-metal strip inside a thermal insulated container that is heated at the same rate the power is used. If the rate of heating is low enough and the rate of heat loss in controlled…..

I may well do this, maybe only charging a tenant if there usage is a lot more than other tenants. (However anyone that is aiming at the DSS end of the market finds it very hard to get money out of a tenant and finds it hard to adjust the rent as tenants just expect to pay the housing benefit...

Some SmartTRV have the option of a remove stat, most have a stat build in. If the radiators are connected at the bottom, then heat from the radiator will not have much effect on a TRV. You can also get a ‘cable’ that lets you mount the TRV head remove from the radiator. Normal TRV can...

There are “smart” TVRs about, that can connect wirelessly to window switches and also allow timing control to be programmed by each room user. TVRs are more accurate then room stats with 2 way valves, as a TVR will reduce the flow rate, but a room stat will just turn the heating off until the...

I hope a normal RCBO would trip very quickly if a load of over 3 times its rating! (But I don’t have the response curves in front of me) Also I don’t think it is a good idea to do a design that only works due to a limitation in a device; the next version of the device may not have such a...

I will be renting out a HMO (e.g. a properly when the tenants each rent 1 room and the landlord pays all bills, with a shared kitchen). There will be gas central heating on a timer and a thermostat that is locked, so each tenant can turn down the heat in their room with the TRV, but can’t...

Is there a device that cuts power if too much is used for a length of time? I wish to have some letting room’s setup, so tenants can use a kettle or hair dryer, but not an electric fire. Is there a reasonably priced device that will cut out when too much power is used over a length of...

The booster tank is a very good option; I am just exploring what the other options are. Given how much cheaper a vented DWH system is and the cost of the Grundfos Home Booster (or an accumulator), I can’t help but think it may be better to pump after the DWH tank. Another question, I see...

Say I wished to have a vented DHW tank and run say 3 out of 5 showers in the building at the same time. Can I put a shower pump (e.g. Mira Vision Pumped Mixer Shower) on each shower without them messing each other up? If I used a single twin head pump (with high flow rating) would I get...