Shower heat recovery devices/combi boilers

[JohnD]

Which company do you work for, Ash, and what is your position there?

 

[bernardgreen]

This whole thread is nothing but a pathetic marketing exercise.

Yes but if they are challenged and cannot provide sensible ( scientifically sound ) answers to questions then a few people will be wary of the product.

 

[muggles]

Heatrae Sadia reckon the Megaflo SHRU saves 60% on the cost of running a shower. If that's correct, it's pretty impressive. Still needs to be installed vertically though, which makes it about as useful as a chocolate teapot in most houses

 

[bernardgreen]

Which company do you work for, Ash, and what is your position there?

There is an Ashley Paul Prescott listed as a Director of
THECODESTORE.CO.UK LIMITED (07055646)
which has a correspondance address listed as 44 Canal Street, Liverpool, Merseyside, L20 8QU

Address for Power_Pipe on their website is also 44 Canal Street, Liverpool, Merseyside, L20 8QU

 

[JohnD]

Surely no director of a reputable company would post marketing material on a DIY website without disclosing his interest?

 

[Ash Prescott]

Which company do you work for, Ash, and what is your position there?

I am the founder and MD of thecodestore.co.uk which is a specialist supplier of sustainable building products. CodeStore has relations with over 300 manufacturers and several thousand developers/contractors across the UK. We are the UK agents for Power-Pipe, although I have a thorough understanding of all WWHR systems on the market (as well as most other energy saving technologies).

I did mention this in my original post but unfortunately this was incorrectly marked as spam and removed, hence why I was reinstated. Apologies that I did not re-iterate this, although I thought it may be apparent by stating that I was assisting Gerald's answer.

Yes but if they are challenged and cannot provide sensible ( scientifically sound ) answers to questions then a few people will be wary of the product.

which is exactly why we have responded and provided nothing but information backed up by independent sources.

I understand your scepticism about the technology, but unfortunately some of the assumptions that have been made are simply not accurate. The main reason I was alerted to this thread was because of the initial question as it posed a genuinely interesting one which I thought I could add input to.

100°C waste water, I doubt it happens in normal houses

If you read my comment in full it stated it was a theoretical example so that it was easy to follow.

There would need to be two specified flow rates to give any meaning full results. How much hot waste water and how much fresh water.

If you read the file I provided a link to then it explains it in full detail. SAP 2009 is 9lpm equal flow, SAP 2012 is 11,5lpm equal flow, then there are the different configurations A, B & C etc..

You are very wrong to publicise marketing estimates based on a false calculation.

I have done no such thing, and as I stated in my answer, the biggest contributing factor in the money saved for the end user is the amount that it (the shower) is used. If you were to not shower at all or have very low hot water usage, then this product will not save you any energy/money. If you have a large family household where the shower is used by every household member every day then you will save a significant amount of energy/money.

Ignoring the standing charge, EST states 4.18p per kWh gas. 400kWh is the recorded saving per person. You have an extremely low tariff and appear to have very low hot water use, so in your scenario I would agree that it may not save as much money/energy as in other scenarios..