Geothermal borehole drilling

danyosan

I have a few quotes for drilling 2 x 150m deep boreholes and the best price I am getting is approx €10K. (€30/metre)

Is the pretty much the best quote I'm going to get or should I shop around a bit more?

Cheers

enda1

10 grand for diggin' a couple o' holes!

Jayses im in the wrong business!!

danyosan

enda1 wrote: »

10 grand for diggin' a couple o' holes!

Jayses im in the wrong business!!

Was thinking the same thing myself.

galwaytt

.....that's not all: are they guarantee-ing the drilling and/or success of the job?

The reason I ask is, that in front of our factory, a house was having a Geo system installed, but after a full week of drilling...........they had to abandon it. Collapsing bores, poor conditions underneath, all conspired to make it a no-go, and they had to put in an oil boiler in the end...........

So, imagine spending 10k..........and then not having it work !

danyosan

galwaytt wrote: »

.....that's not all: are they guarantee-ing the drilling and/or success of the job?

The reason I ask is, that in front of our factory, a house was having a Geo system installed, but after a full week of drilling...........they had to abandon it. Collapsing bores, poor conditions underneath, all conspired to make it a no-go, and they had to put in an oil boiler in the end...........

So, imagine spending 10k..........and then not having it work !

I'm 90% sure they are guaranteeing the job, they also pressure test the lines after dropping them down the holes.


So is there no-one around that can tell me if this is the best price I''m going to get?

galwaytt

It's been a long time, but the last borehole I had done, for water, was........1996........and cost (equivalent to.....) € 7.5 a metre. I think 10 yo-yo's isn't an outrageous increase over that period of time...........

Wobs

Is that just for boring or does that include grouting? If its just for boring its a bit high, you should be able to get it for about 25. If it includes grouting that would be good!

danyosan

galwaytt wrote: »

It's been a long time, but the last borehole I had done, for water, was........1996........and cost (equivalent to.....) € 7.5 a metre. I think 10 yo-yo's isn't an outrageous increase over that period of time...........

your arithmetic is a bit out mate, it's a €22.50 increase.

I've been quoted 30/m

RUA101

danyosan wrote: »

I have a few quotes for drilling 2 x 150m deep boreholes and the best price I am getting is approx €10K. (€30/metre)

Is the pretty much the best quote I'm going to get or should I shop around a bit more?

Cheers

Danyosan i'd say definitly shop around. I'm going for the vertical bore holes and i've found a difference of nearly ten euro a metre between a lot of drilling companies.

danyosan

RUA101 wrote: »

Danyosan i'd say definitly shop around. I'm going for the vertical bore holes and i've found a difference of nearly ten euro a metre between a lot of drilling companies.

Any chance you could pm me the best price you found?

Chet T16

The brother just had his done (literally, they left yesterday) He said it was 12k for 2 x 100m holes. The job was contracted out by whoever is doing the heating so that figure could be a bit out

danyosan

I am seriously thinking about knocking this on the head now as it's looking like its going to cost around 30K all in for the heating system.

We are building a low energy timber framed house, so I'm now thinking along the lines of installing the underfloor heating, but with a boiler powering it and giving it a year to see how it goes.

I'd hate to have spent 30K on a system thats only turned on for 2 months a year.

RUA101

Dan I'm still only pricing and i don't realy know how to pm so just bare with me. I got a price of 22euro per metre. That was the lowest but there fairly competitive with each other i found. I also have to pay for the collector loop and the back fill of either Bentonite(20-30 for one bag that will only fill a foot or so. realy expensive)or p gravel that i can buy by the tone. Also rent a hopper and funnel to make sure it goes in even. Theres a lot in this to think about and i'm starting to get bogged down with the figures. I'm so confused!!!

muffler

RUA101 wrote: »

and i don't realy know how to pm

Just to help you out on that - its fairly simple. Click on the user's name that you want to PM. Then click on "view public profile". Then on the right hand side you will see a link "send a private message to XXX". Just click on that and bobs your uncle

RUA101 wrote: »

so just bare with me.

Fuck :eek:

Maybe that should be bear

Villain

GeoThermal is not a cost effective way of heating a house, I have spoken to many people on the trade and the electricity costs are scary not to mention the install cost.

sinnerboy

galwaytt wrote: »

.....that's not all: are they guarantee-ing the drilling and/or success of the job?

The reason I ask is, that in front of our factory, a house was having a Geo system installed, but after a full week of drilling...........they had to abandon it. Collapsing bores, poor conditions underneath, all conspired to make it a no-go, and they had to put in an oil boiler in the end...........

So, imagine spending 10k..........and then not having it work !

Hi galwaytt

just found out a clients site has a high water table ( 300mm below topsoil )

as far as you know , will this affect the feasability of deep core drilling ?

Villain

sinnerboy I found http://www.waterencyclopedia.com/Ge-Hy/Groundwater.html to be helpful.

qazxsw

Villain wrote: »

GeoThermal is not a cost effective way of heating a house, I have spoken to many people on the trade and the electricity costs are scary not to mention the install cost.

pretty broad brush strokes you're using there...

Villain

qazxsw wrote: »

pretty broad brush strokes you're using there...

It is a broad brush I agree but I have two uncles who work for large plumbing contractors and they have installed every system you care to mention and Geothermal is their last choice when it comes to cost effectiveness. I also have a neighbour who installed a system and the electricity bills have to be seen to be believed he says.

I'm sure it works well and its eco friendly I just don't think its cost effective, with some people cost is a minor factor so geothermal is a good option.

twenty8

Villain wrote: »

It is a broad brush I agree but I have two uncles who work for large plumbing contractors and they have installed every system you care to mention and Geothermal is their last choice when it comes to cost effectiveness. I also have a neighbour who installed a system and the electricity bills have to be seen to be believed he says.

I'm sure it works well and its eco friendly I just don't think its cost effective, with some people cost is a minor factor so geothermal is a good option.

Villan - maybe you should be sure first.

I have Geothermal heating a 3,500 sq ft house and the wife has the entire house at around 23 - 25 degrees. Very warm. Have it for approx 10 months now and the entire electricity bill is coming in at under €300 for 2 months. I don't think that this is unreasonable. And this is the horizontal collector - as far as I know the vertical collector is more efficient.

Villain

twenty8 wrote: »

Villan - maybe you should be sure first.

I have Geothermal heating a 3,500 sq ft house and the wife has the entire house at around 23 - 25 degrees. Very warm. Have it for approx 10 months now and the entire electricity bill is coming in at under €300 for 2 months. I don't think that this is unreasonable. And this is the horizontal collector - as far as I know the vertical collector is more efficient.

Neighbour has a 3,500 sq ft house and UFH and his bills are nearly €500 for 2 months over winter and those aren't estimated bills either his previous esb bills were near €150 -€200, now I don't think his insulation is out of this world but it certainly is higher than regs now that ESB cost isn't huge compared to oil but the installation costs are, the pay back taking maintenance into account is very high and I know that if issues arise with systems outside the warranty period, which can be short on some parts of the system, cost to investigate and repair can be huge.

I'm not sure but many people with expierence in the trade are sure that geothermal is not cost effective

danyosan

Villain wrote: »

Neighbour has a 3,500 sq ft house and UFH and his bills are nearly €500 for 2 months over winter and those aren't estimated bills either his previous esb bills were near €150 -€200, now I don't think his insulation is out of this world but it certainly is higher than regs now that ESB cost isn't huge compared to oil but the installation costs are, the pay back taking maintenance into account is very high and I know that if issues arise with systems outside the warranty period, which can be short on some parts of the system, cost to investigate and repair can be huge.

I'm not sure but many people with expierence in the trade are sure that geothermal is not cost effective

I've been given figures for COP of over 5, there is nothing else on the market that I'm aware of that beats that.

I was advised by a heating engineer that if you're going the geothermal route, to make sure its a trusted manufacturer though, as the lesser models are pieces of ****.

ircoha

twenty8 wrote: »

Villan - maybe you should be sure first.

I have Geothermal heating a 3,500 sq ft house and the wife has the entire house at around 23 - 25 degrees. Very warm. Have it for approx 10 months now and the entire electricity bill is coming in at under €300 for 2 months. I don't think that this is unreasonable. And this is the horizontal collector - as far as I know the vertical collector is more efficient.

Would you mind sharing a few details with us on this to help with the discussion:
For eaxmple, what spec inulation is the house, do u have HRV.

What make of GT kit did you install
what Kw's is it
what length is the piping, and what aspect is it in, South
what is circulating in the pipes
How many people using the hot water, showers, bath, jacussi
Do u have a (non-spouse) dishwasher
Does the cloth washer take hot water.
What sort of lighting have you got, halogen, incandy etc.

Thanks.