SteamyTea

Common practice for the industry sad to say. Been a few years since I worked in it, but the sales tactics was typical for a double glazing company, which a lot of PV companies where. They relied a lot on people's ignorance, which seems strange to me when they were, at the time, paying £12-£16k for a 4 kWp system.

That is 2 m2 larger than my 2 bedroom house.

A blower, a proper one, would be a useful bit of kit to lend out. How much does one cost second hand? Could join the MVHR kit.

Occasionally, a neighbour, about 100 metres from me, blocks the main sewer. This causes a back up to the 6th house where I am. The smell is very noticeable inside my house. So do you have had neighbours that are causing the problem. If so, report it to the water company, they fine the bend blocking culprits. Failing that, I find it is a hummus supper.

@Home Farm Does your solar array actually have a shading issue?

I seem to remember, from years ago, it is/was.

That is about double what I pay, for a house it is about 6 times bigger. Though energy use per square metre of floor area is not a very good metric.

It is well worth making your own blower if you can as when a house is tested, there is not enough time to find all the leaks. And the leaks are very obvious. No need to get hippy @joe90 with his josh sticks, but I will travel for 200 Marlboro and petrol money.

You can fit heat pumps to any building, just that because of the oversizing, the capital cost may be higher. That is always the case, regardless of heating system. Possibly, possibly not. Oil has been pretty cheap the last 12 years or so. There was a guy, who lives near me, over at the other place, that fitted a GSHP because the price of oil shot up (about 2006/7 I think). Then the price of oil plummeted and his GSHP cost him more to run than oil. As a rule of thumb, if people are on mains gas, heat pumps are not financially viable, they may be more environmentally better. But it does depend on many factors. If it was simple, we would all know what to do.

There is a bit of a myth about using ASHPs (or any heat pump) in an old thermally leaky house. The thermal load, is the thermal load, a heat pump does not care why the load is what it is. What it really comes down to is sizing correctly. With a traditional boiler, gas, oil, electric, you work out your maximum load, add a small contingency, they go and buy the nearest size to it, knowing that it can run at full power when it is demanded. A heat pump, and especially an ASHP, does not work like that. As you get closer to the maximum output, there is a greater risk of them 'icing up'. This is because more, damp air is being forced though the unit, just as it is trying to get the biggest temperature difference. Then what happens is that either/or/and, an electrical resistance element is switched on to help the unit out, the heat pump can 'steal' some of the stored water to heat up the external radiator to defrost it, it can just switch off until it defrosts. It may e a combination of all of them. This is why ASHPs have to be oversized to reduce the chance of them running at maximum output and the resistance heater coming on and reducing the chance of frosting. And that is before the heat emitters have been considered.

Or my water heating and two storage heaters.

That chart has me confused too, and judging by the replies, no one else wants to take it on. Possibly best asking the manufacturer/supplier to tell you what it is about.

Sounds like Economy 7. What are the unit prices and the meter rental charges. 2000 kWh would cost me about 180 quid.

First thing to do is get yourself a site safety certificate, they tend to be cheap to get, sometimes even free. Then just approach small companies and explain what you want to do. Once you have done a year of it, then look into proper college courses.

Probably not worth it just for hot water. How are you space heating?

Was the 400k the change in circumstances?

People on here. Can't remember the name of the thread, and care even less as I think building your own home from scratch is a bit too much. So not my problem.

When I suggested that approach, all I heard was many reasons why it would not happen. I find it best to get these things sorted out before purchase. If the vendor is unwilling/unable, then find someone that can accommodate it.

My shower is dual digital. On Off. Too Hot Too Cold. But was only 120 quid.

kW

The size of the house, and the associated heat load, is technology neutral. It is just a case of sizing any method of thermal generation correctly. Have you done an estimate of your heat load? Unlike most combustion boilers, heat pumps work best when then are over size. This is to do with the output temperature. There is a lot of stuff on here about sizing heat pumps.

You should not need any for a GSHP, but do the sums carefully as, generally, and ASHP is better. And for that you may need permission.

I thought it was a case of for every thing we have to do, we have a law that makes it illegal. Remember when at school and you crossed your fingers behind your back, while agreeing to something. That is government sanctioned, in fact, it is policy, now. Great.