Easiest/Cheapest Renewble Energy Option

Jimbo

Hello,

With the new Part L building Regulations demanding at least part of a houses energy supply to come from renewable technology, what is the easiest/cheapest way of fufilling this requirement for someone who is building to rent?

Are solar panels the easiest option or would an investment in, say, a geothermal system pay off quickly?

smooth operater

For a very small house, i'd say flat plate solar, for bigger houses a heap pump, as its measured per square meter

sinnerboy

most likely wood stove as secondary heat source .

Jimbo

^
Intriguing.
Would that definatly be acceptable?

sinnerboy

maybe . depends on DEAP calcs - BER assessor can assist

smooth operater

Good thinking...But no, that alone wouldn't work,
What size is the house?

Jimbo

Just talking in gereal really.
What would be best for say, 200 sq/m.

smooth operater

Well a wood pellet boiler/biomass boiler would do the trick

ardara1

jimbo78 wrote: »

Hello,

With the new Part L building Regulations demanding at least part of a houses energy supply to come from renewable technology, what is the easiest/cheapest way of fufilling this requirement for someone who is building to rent?

Are solar panels the easiest option or would an investment in, say, a geothermal system pay off quickly?

Put a wood burning stove in the fire place and seal chimney - hits the 10 kwhr/m2 every time

smooth operater

ardara1 wrote: »

Put a wood burning stove in the fire place and seal chimney - hits the 10 kwhr/m2 every time

Are you getting this from deap software? What percentage of heat is being given out by your secondary heat source??

ardara1

smooth operater wrote: »

Are you getting this from deap software? What percentage of heat is being given out by your secondary heat source??

It IS the secondary heating - try it.
Change your chimney from a chimney to a flue - add stove as the secondary source burning logs - hits the LZC target in every house type so far (As long as it has the ability to take a stove!)

BoozyBabe

ardara1 wrote: »

Change your chimney from a chimney to a flue

Sorry, showing the fact that I'm a girl here:o, but what does that mean exactly? Like what does it involve?

My bf wants chimneys, I want an airtight house & I'm looking for a bit of a compromise while keeping a nice fireplace

ardara1

BoozyBabe wrote: »

Sorry, showing the fact that I'm a girl here:o, but what does that mean exactly? Like what does it involve?

My bf wants chimneys, I want an airtight house & I'm looking for a bit of a compromise while keeping a nice fireplace

by closing the chimney with the stove you basically reduce the size - to a flue - just a different volume of air loss up a tube. - so amend the deap calc accordingly

smooth operater

ardara1 wrote: »

It IS the secondary heating - try it.
Change your chimney from a chimney to a flue - add stove as the secondary source burning logs - hits the LZC target in every house type so far (As long as it has the ability to take a stove!)

-if you go to the deap analysis, it says- "fraction of heat from secondary heat source"

What fraction are you putting in that?

Sounds to me your putting 100% according to the part in bold.....

sydthebeat

if the secondary heating provides 100% heating then its not secondary...;)

generally a figure of 10% is inputted, as got from table 7.

smooth operater

ardara1 wrote: »

It IS the secondary heating - try it.
Change your chimney from a chimney to a flue - add stove as the secondary source burning logs - hits the LZC target in every house type so far (As long as it has the ability to take a stove!)

sydthebeat wrote: »

if the secondary heating provides 100% heating then its not secondary...;)

generally a figure of 10% is inputted, as got from table 7.

Yes but you can hardly get a LZC house from using 10% secondary and 90% gas...........
Thats why im asking what % secondary he's inputting

sydthebeat

smooth operater wrote: »

Yes but you can hardly get a LZC house from using 10% secondary and 90% gas...........
Thats why im asking what % secondary he's inputting

why not? im sure its possible.

smooth operater

Just checked it out on an average house (178m2), got 7kWh/m2, kinda surprised tbh.
So to get this up I'd have to use a more inefficient wood stove or up get the energy demands higher to meet it, yay or nah?

ardara1

smooth operater wrote: »

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-if you go to the deap analysis, it says- "fraction of heat from secondary heat source"

What fraction are you putting in that?

Sounds to me your putting 100% according to the part in bold.....

It's defaulted at 10% - keep it there.
Have alook at all th eDEAPs you've run in the past - have a look in results for energy reuirment secondary heating - if this is bigger then the flaoor area x 10 - and it can be met by a stove - then you're there.

smooth operater

I will step down. Good to know its a possibility alright.