Who are the Heat Geeks of air conditioning? (ideally in the South East)

[knightian]

Hello everyone,

 

I've just started building a large "extension".  We've knocked down about 2/3rd of an old timber frame bungalow and are rebuilding it with a Potton timber frame building.  This won't be Passiv Haus levels, but will exceed the new Part L for insulation and air tightness.  The rebuilt section will be its own thermal envelope and have underfloor heating from a biomass boiler and MVHR.

 

I'm struggling to find an installer that applies the same analytical rigour as Heat Geeks.  The installers I've contacted so far have ignored my SAP calculations and used rules of thumb based on the area of the building and end up proposing cooling systems that seem far too large.

 

Does anyone have any recommendations of installers (ideally in the South East) that will read a SAP or at least conduct their own thermal modelling first, taking into account the fabric, glazing, orientation etc?

 

Thanks!

[JohnMo]

1 hour ago, knightian said:

Hello everyone,

 

I've just started building a large "extension".  We've knocked down about 2/3rd of an old timber frame bungalow and are rebuilding it with a Potton timber frame building.  This won't be Passiv Haus levels, but will exceed the new Part L for insulation and air tightness.  The rebuilt section will be its own thermal envelope and have underfloor heating from a biomass boiler and MVHR.

 

I'm struggling to find an installer that applies the same analytical rigour as Heat Geeks.  The installers I've contacted so far have ignored my SAP calculations and used rules of thumb based on the area of the building and end up proposing cooling systems that seem far too large.

 

Does anyone have any recommendations of installers (ideally in the South East) that will read a SAP or at least conduct their own thermal modelling first, taking into account the fabric, glazing, orientation etc?

 

Thanks!

Good luck on that one

[Nickfromwales]

3 hours ago, knightian said:

Hello everyone,

 

I've just started building a large "extension".  We've knocked down about 2/3rd of an old timber frame bungalow and are rebuilding it with a Potton timber frame building.  This won't be Passiv Haus levels, but will exceed the new Part L for insulation and air tightness.  The rebuilt section will be its own thermal envelope and have underfloor heating from a biomass boiler and MVHR.

 

I'm struggling to find an installer that applies the same analytical rigour as Heat Geeks.  The installers I've contacted so far have ignored my SAP calculations and used rules of thumb based on the area of the building and end up proposing cooling systems that seem far too large.

 

Does anyone have any recommendations of installers (ideally in the South East) that will read a SAP or at least conduct their own thermal modelling first, taking into account the fabric, glazing, orientation etc?

 

Thanks!

Hi.

Are you improving and upgrading the existing bits to match the performance of the new SIPS stuff from Potton? I assume they've comprehensively commented on this already?

That assumed, MVHR will be mandated and then a full heat loss (and overheat) analysis can be done on desktop to allow you to tender to any decent A/C company.

 

Best to get the horse and the cart in check, and then you can provide vital information to these 3rd parties YOURSELF, vs expecting them to do this heavy lifting. The best due diligence is the one(s) you do yourself. Potton should have already given you ACH targets and U-values etc for their 'bits'? Just need to add the existing part and you're off to the races.

 

2 hours ago, JohnMo said:

Good luck on that one

You could have elaborated here just a little bit lol......

 

3 hours ago, knightian said:

The rebuilt section will be its own thermal envelope

No, it wont. Unless these are 2 separate and non cojoined items then they will always be as one; they'll be the same heated and airtight envelope, so the weak one will bring down the stronger and not vice versa. Who's advising you on your M&E side, as this sounds like you're getting less than great information upon which to be making these decisions?