Greener heating systems (sense at last!)

[MNW67]

It is 2% free heat at optimal temperature.

Most people have their flow temp to high to condense.

Temperature set comes into it.

I think most people are expecting much bigger savings, though, after all the spin. Who is going to notice 2%?

Having said that, with a flow of 50C and a return of 38C you might get a 7% saving in theory!

 

[Deleted member 317777]

I can't remember. I found it all very hard, and they weren't the friendliest bunch for a newbie. But I don't think the heat output drops as much as you might think with outside temperature. It's more that it produces the same heat but less efficiently. That was what I had got wrong before I started asking questions last year. I think a single 18kW ASHP might be enough in your example. The key would ne having massive radiators.

I’ve got 5kw of radiators in my front room. It’s a flow temperature issue.

 

[MNW67]

I’ve got 5kw of radiators in my front room. It’s a flow temperature issue.

5kW at what flow temperature?

 

[Deleted member 317777]

I think most people are expecting much bigger savings, though, after all the spin. Who is going to notice 2%?

Having said that, with a flow of 50C and a return of 38C you might get a 7% saving in theory!

View attachment 376087

You might do in a well insulated new house.

The delta is normally wider than 12 degrees

 

[Deleted member 317777]

Do We Really Need DT20? - HeatGeek

DT20, the good, the bad and the ugly. Understand the truth about DT20 and how to design your system around it.

www.heatgeek.com

They talk sense.

A bloke called Kim does a hydronic separation course, I enjoyed that.

Don’t forget controls play a big part

 

[gas112]

Why haven’t you asked Nwgs for facts to back up his claim?

Anyway it’s perfectly possible to use a DOT (design outside temp) of -5deg for a heat pump in many U.K. homes.

Heat pumps can work well even in relatively poorly insulated homes.

At the moment the Kw cost of electricity is much higher than gas, which is why heat pumps arent cost effective in many cases…..although solar + battery can tip the balance. But then the problem is capital investment and payback period.


Heat pumps can work out well for those people on heating oil

shut the fek up and get off google you have not got a clue how any of it works in the real world . People now in real fuel poverty after being conned that all singing and dancing heat pumps would reduce their bills

 

[transam]

The legal scheisters are on to heat pumps they smell. Buck to be made

No win / no fee

Even sending some of there staff on ASHP courses

Could be the next big legal claim caper ??

Know if one big estate that are seeking legal advice on there install

 

[transam]

Do We Really Need DT20? - HeatGeek

DT20, the good, the bad and the ugly. Understand the truth about DT20 and how to design your system around it.

www.heatgeek.com

They talk sense.

A bloke called Kim does a hydronic separation course, I enjoyed that.

Don’t forget controls play a big part

Kim is a clued up bloke on this hydronic caper

He Did some state of the art ??? Thinking out the
Box hot water system for a brothel if I recall correctly

 

[diy_fun_uk]

I think most people are expecting much bigger savings, though, after all the spin.

Milliband keeps telling us bills are going to come down, we'll have some of the cheapest energy in Europe if not the world according to him.

Ok, so we all need to pay more for the next 20-30 years to build the green con infrastructure, however after that he's confident bills could/should/might come down.

I trust Milliband.

 

[Deleted member 317777]

Kim is a clued up bloke on this hydronic caper

He Did some state of the art ??? Thinking out the
Box hot water system for a brothel if I recall correctly

Yeah his knowledge is unrivalled with heating and controls.

Ray who used to be in the CC helped develop PDHW in the uk. Putting a resistor in the WC was a clever idea.

People are missing the fact, 50 degrees won’t be enough to warm a lot of older properties. Adding more radiators means adding more heating pumps……

 

[Deleted member 317777]

shut the fek up and get off google you have not got a clue how any of it works in the real world . People now in real fuel poverty after being conned that all singing and dancing heat pumps would reduce their bills

Well said.

I know a large eco company who have dropped ashp all together.

Sort of ruins my thread in the CC

 

[gas112]

Initially when i seen Scottish government i thought it was in relation to this idea .
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Electric wallpaper is being trialled as a green alternative to central heating in social housing properties in Glasgow. Scottish homes are among the oldest and worst insulated in Europe, with about 70,000 tenement flats in Glasgow alone, and heating accounts for more than 36% of total carbon emissions in the UK.

 

[Deleted member 317777]

HeatpumpMonitor.org - Heat Pump Performance Data

An open-source initiative to share and compare heat pump performance data. Join our community of heat pump owners sharing real-world performance data.

heatpumpmonitor.org

The people on this site have paid £600 for equipment to be able to upload their information.

It’s a good site, but the crap ones definitely aren’t on there

 

[MNW67]

HeatpumpMonitor.org - Heat Pump Performance Data

An open-source initiative to share and compare heat pump performance data. Join our community of heat pump owners sharing real-world performance data.

heatpumpmonitor.org

The people on this site have paid £600 for equipment to be able to upload their information.

It’s a good site, but the crap ones definitely aren’t on there

It's full of people boasting about how big their COPs are.

 

[Deleted member 317777]

It's full of people boasting about being their COPs are.

I’ve not really looked but if you pay £600….

I notice the top ones installer has done- Heating Academy Hydronics course. That’s a good course