tullah
Member
- Location
- Linconshire
I've seen some very different prices for pre-insulated pipe per metre. What's the going rate and which are the best value that conform to the RHI? How does one get it trade?
Last edited:
Underground pre-insulated pipe price?
- Thread starter tullah
- Start date
- Location
- Shropshire
I posted something about this on biomass boiler thread.
Google calpex or microflex pipe. Ring them up or email, they will be happy to deal with you direct.
Google calpex or microflex pipe. Ring them up or email, they will be happy to deal with you direct.
NavitasBen
Member
- Location
- Somerset
CalPEX and Rehau Rauthermex are the best performing in terms of heat loss, although neither are cheap (Rehau especially not so). Uponor is a good "middle of the road" option, as is Flexalen. The Rehau Rauvitherm is awful for heat lost; you get what you pay for.
NavitasBen
Member
- Location
- Somerset
The Rauthermex is incredibly expensive; the heat savings don't justify the initial outlay from what we've calculated. The Rauvitherm on the other hand just heats the soil!
Penmoel
Member
Courier
Member
- Location
- M62 - M1 - M18 triangle
Give these guy's a ring - very obliging and won't lift your leg too high
Hunts Pipeline Supplies
WF6 1RQ
01924 890693
Hunts Pipeline Supplies
WF6 1RQ
01924 890693
Sheep farmer
New Member
Hi, I have installed a biomass boiler with 100m heat pipe 1.2m deep. This was all done and the pipe burried and concreted over in places etc. I specifically asked for rehau Rauthermex. When it was delivered all ends were covered up so we couldn't see the ends and never even considered they had supplied us with rauvitherm instead. It's in now and changing it would cost about £2000 in digging etc not to mention connecting 2 houses.
My question is what additional heat losses should I expect due to inferior pipe. It runs 70degrees celcius 24/7 for hot water. Also what is the difference in price? I still owe installer final payment but am damn sure they ain't getting it all as they have screwed me on pipe and I also have all the additional heat loss to pay for over its lifetime!
Thanks
My question is what additional heat losses should I expect due to inferior pipe. It runs 70degrees celcius 24/7 for hot water. Also what is the difference in price? I still owe installer final payment but am damn sure they ain't getting it all as they have screwed me on pipe and I also have all the additional heat loss to pay for over its lifetime!
Thanks
- Location
- CW5 Cheshire
What diameter is the pipe and are the houses individually heat metered or one heat meter and a calculation for the heat loss for RHI?
Sheep farmer
New Member
Hi, rhi currently in review with an application for 1 meter with estimated heat loss deducted. I'm told theoretical heat loss is much less than actual. Boiler room is between 2 properties. Both pipes are 32mm. Both have their own circulation pump. Company has agreed to move pump into farmhouse so as it is comes on with heating or demand from hot water cylinder. Told this will save a lot of heat but this is on system with only 25m pipe as opposed to other with 75m and circulating 24/7.
Consellation is that I'm getting paid for heat loss over and above the one submitted by independent assessor. However it still really pisses me off when you don't get what you ask for. My intention was to make it as efficient as possible.
The company is based in central scotland. One of the best known ones.
Thanks
Consellation is that I'm getting paid for heat loss over and above the one submitted by independent assessor. However it still really pisses me off when you don't get what you ask for. My intention was to make it as efficient as possible.
The company is based in central scotland. One of the best known ones.
Thanks
- Location
- CW5 Cheshire
Totally understand your frustration, however at least you are on calculated heat loss else it would have been much worse.
Was the pipe price listed on the quote? The quotes I've have had have all given a price for the pipe. The company I used wanted the balance of the money before they would send the RHI application in, they really have you over a barrel then.
There are some pipe prices kicking around on the internet and pipe heat losses in watts/m are available on the Rehau website. I think losses are about double on the rauvitherm pipe.
Was the pipe price listed on the quote? The quotes I've have had have all given a price for the pipe. The company I used wanted the balance of the money before they would send the RHI application in, they really have you over a barrel then.
There are some pipe prices kicking around on the internet and pipe heat losses in watts/m are available on the Rehau website. I think losses are about double on the rauvitherm pipe.
I have a feeling we had problems with the same company over a complete mess of an install. We withheld final payment for three months till most of the problems had been fixed.
In turn they waited three months before starting the RHI application which then took another two months to complete.
NavitasBen
Member
- Location
- Somerset
What size is your boiler, for the RHI value of the heat loss?
NavitasBen
Member
- Location
- Somerset
The heat lost from the Rauvitherm will cost circa £235 pa, versus approx. £165 pa from Rauthermex, including both the lost RHI value and the cost of the pellets to produce the lost heat. (assuming you're on a tier 1 tariff of 8.6p). The Rauthermex costs roughly 50% more per metre than the Rauvitherm.
Sheep farmer
New Member
Hi. It's a 60kw heizomat. I've got another one but it was fitted slightly later after I noticed the wrong heat pipe and got it changed so second install done the way I wanted.
I feel that they should at least give me the losses x20yrs.
Quarterly deduction is 491kw.
Worked out Boiler using 100kw/day to provide instant hot water to cottage. Turned off unit in house so no water could be used as people were away for a week so 100kw was losses from buffer and 75m heat pipe only. If installer had told me this I would have put losses in my heat usage calculations and got a bigger boiler to maximise tier 1.
Paid my deposit 15th feb.
Took till 28th April until they ordered boilers......I had to call heizomat direct to get an honest answer as to when they were coming.
One boiler finished by end of June but RHI still in review. They demanded 90% of price before they would install so this was paid in beginning June.
Second boiler had customised 18m3 feed bin which should have taken 8 weeks to order from 15th feb but guess what....they forgot and only ordered it in mid June!! It took 10wks to arrive so boiler was only eventually up and running last week.....that's 7 1/2 months since deposit. I'm usually pretty calm over most things but this endless f**k up has made my blood boil. I don't even know what RHI I will get. I dread falling into post September tafiff.
Still got £7000 (8.5%)to pay but feel they don't deserve a penny more especially when they told me 3mts max to fit.
I feel that they should at least give me the losses x20yrs.
Quarterly deduction is 491kw.
Worked out Boiler using 100kw/day to provide instant hot water to cottage. Turned off unit in house so no water could be used as people were away for a week so 100kw was losses from buffer and 75m heat pipe only. If installer had told me this I would have put losses in my heat usage calculations and got a bigger boiler to maximise tier 1.
Paid my deposit 15th feb.
Took till 28th April until they ordered boilers......I had to call heizomat direct to get an honest answer as to when they were coming.
One boiler finished by end of June but RHI still in review. They demanded 90% of price before they would install so this was paid in beginning June.
Second boiler had customised 18m3 feed bin which should have taken 8 weeks to order from 15th feb but guess what....they forgot and only ordered it in mid June!! It took 10wks to arrive so boiler was only eventually up and running last week.....that's 7 1/2 months since deposit. I'm usually pretty calm over most things but this endless f**k up has made my blood boil. I don't even know what RHI I will get. I dread falling into post September tafiff.
Still got £7000 (8.5%)to pay but feel they don't deserve a penny more especially when they told me 3mts max to fit.
NavitasBen
Member
- Location
- Somerset
So long as the RHI application was submitted before the tariff cut then it shouldn't matter when the confirmation comes through, as the accreditation will be backdated to the date on which the application was first submitted.
491kW quarterly is a big deduction; on what basis did you submit the heat loss calculation?
491kW quarterly is a big deduction; on what basis did you submit the heat loss calculation?
Sheep farmer
New Member
It's based on 100m heat pipe. I have a 2000ltr buffer but don't know if losses in plant room are included. Works out at 2.5% heat loss based on 80,000kw used per year.
Company have said I'm last person they are going to do with 1 meter as ofgem are supposedly starting to change wording which will ultimately end up with anybody with over 10m of underground pipe having to have all points of use with separate meter. They have probably caught onto the fact that actual heat losses are significantly more than theoretical.
My other system is 50m of rehauthermex and losses quoted at 204kw per quarter (1%)
Luckily both were sneakily applied for on 30/6/14.
Company have said I'm last person they are going to do with 1 meter as ofgem are supposedly starting to change wording which will ultimately end up with anybody with over 10m of underground pipe having to have all points of use with separate meter. They have probably caught onto the fact that actual heat losses are significantly more than theoretical.
My other system is 50m of rehauthermex and losses quoted at 204kw per quarter (1%)
Luckily both were sneakily applied for on 30/6/14.