Alpha Values and Thermal Bridging

Shane Regan — Mon, 24 Aug 2020 09:13:44 GMT

Current Revision posted to Hevacomp Wiki by Shane Regan on 8/24/2020 9:13:44 AM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Design Database
	Subarea:	Part L

Overview

Notional and Actual Alpha values can be found in the Building Global Parameters section of Compliance documentation:

Calculated Alpha values for your Actual building could be substantially higher than for the Notional building.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine using the information provided for Thermal Bridging on the "Misc." tab in the PartL program:

This provides an option to manually enter Psi values. The calculation method used by SBEM thereafter is determined by the National Calculation Methodology as set out in the Modelling Guide. An excerpt containing guidance on Thermal Bridges can be found below:

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

Tags: Part L, Hevacomp Mechanical Designer, Thermal bridging, alpha values

Alpha Values and Thermal Bridging

Duncan Brown — Tue, 15 Nov 2016 15:35:35 GMT

Revision 13 posted to Hevacomp Wiki by Duncan Brown on 11/15/2016 3:35:35 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Design Database
	Subarea:	Part L

Overview

Notional and Actual Alpha values can be found in the Building Global Parameters section of Compliance documentation:

Calculated Alpha values for your Actual building could be substantially higher than for the Notional building.

Method

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

Tags: Part L, Hevacomp Mechanical Designer, Thermal bridging, alpha values

Alpha Values and Thermal Bridging

Shane Regan — Wed, 26 Oct 2016 16:09:44 GMT

Revision 12 posted to Hevacomp Wiki by Shane Regan on 10/26/2016 4:09:44 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Design Database
	Subarea:	Part L

Overview

Notional and Actual Alpha values can be found in the Building Global Parameters section of Compliance documentation:

Calculated Alpha values for your Actual building could be substantially higher than for the Notional building.

Method

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

Tags: Part L, Hevacomp Mechanical Designer, Thermal bridging, alpha values

Alpha Values

Shane Regan — Mon, 13 Apr 2015 13:40:52 GMT

Revision 11 posted to Hevacomp Wiki by Shane Regan on 4/13/2015 1:40:52 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine using the information provided for thermal bridging on the "Misc." tab in the PartL program.

For the Actual building; the Alpha Value is the average heat transfer co-efficient due to thermal bridging.

The notional building has a set Alpha Value of 10%, which is considered along with a constructions U-value.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Alpha Values

Shane Regan — Mon, 13 Apr 2015 13:40:10 GMT

Revision 10 posted to Hevacomp Wiki by Shane Regan on 4/13/2015 1:40:10 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

For the Actual building; the Alpha Value is the average heat transfer co-efficient due to thermal bridging.

The notional building has a set alpha value of 10%, which is considered along with a constructions U-value.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Alpha Values

Shane Regan — Tue, 10 Mar 2015 15:30:11 GMT

Revision 9 posted to Hevacomp Wiki by Shane Regan on 3/10/2015 3:30:11 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine.

The alpha value is the percentage of the buildings equivalent average heat transfer coefficient, due to thermal bridging. For the Actual building; this is the average heat transfer co-efficient due to thermal bridging. This is based entirely on the information provided for thermal bridging on the "Misc." tab in the PartL program, whether user defined or default figures are used. The notional building has a set alpha value of 10%, which is considered along with a constructions U-value.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Calculating Alpha Values

Duncan Brown — Tue, 09 Dec 2014 11:57:34 GMT

Revision 8 posted to Hevacomp Wiki by Duncan Brown on 12/9/2014 11:57:34 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Calculating Alpha Values

Duncan Brown — Mon, 21 Jul 2014 10:52:45 GMT

Revision 7 posted to Hevacomp Wiki by Duncan Brown on 7/21/2014 10:52:45 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Calculating Alpha Values

Duncan Brown — Mon, 21 Jul 2014 10:41:32 GMT

Revision 6 posted to Hevacomp Wiki by Duncan Brown on 7/21/2014 10:41:32 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Calculated Alpha values for your Actual building design could be substantially higher than for the Notional building design.

Method

Alpha values are not set directly in Bentley Hevacomp's PartL program, but are determined by the SBEM calculation engine.

For queries regarding Alpha value calculations, you should consult with your accreditation Scheme Provider.

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Calculating Alpha Values

Elisabeth Pry — Wed, 26 Jun 2013 19:11:52 GMT

Revision 5 posted to Hevacomp Wiki by Elisabeth Pry on 6/26/2013 7:11:52 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Alpha values for your building design are calculated through the SBEM calculation.

Method

To see more information on this method, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Calculating Alpha Values

Elisabeth Pry — Wed, 26 Jun 2013 19:11:17 GMT

Revision 4 posted to Hevacomp Wiki by Elisabeth Pry on 6/26/2013 7:11:17 PM


	Applies To

	Product(s):
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

Alpha values for your building design are calculated through the SBEM calculation.

Method

To see more information on this method, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: TechNote, selectservices, Hevacomp Mechanical Designer

Calculating Alpha Values

Duncan Brown — Tue, 17 Jul 2012 09:12:23 GMT

Revision 3 posted to Hevacomp Wiki by Duncan Brown on 7/17/2012 9:12:23 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

Alpha values for your building design are calculated through the SBEM calculation.

Method

To see more information on this method, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Part L - Calculating Alpha Values

Duncan Brown — Mon, 16 Jul 2012 13:06:09 GMT

Revision 2 posted to Hevacomp Wiki by Duncan Brown on 7/16/2012 1:06:09 PM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

Alpha values for your building design are calculated through the SBEM calculation.

Method

To see more information on this method, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Part L- Calculating Alpha Values

Duncan Brown — Thu, 23 Feb 2012 16:02:31 GMT

Revision 1 posted to Hevacomp Wiki by Duncan Brown on 2/23/2012 4:02:31 PM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

Alpha values for your building design are calculated through the SBEM calculation.

Method

To see more information on this method, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Alpha Values and Thermal Bridging

Alpha Values and Thermal Bridging

Overview

Method

Alpha Values and Thermal Bridging

Overview

Method

Alpha Values and Thermal Bridging

Overview

Method

Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Overview

Method

See Also

External Links

Comments or Corrections?

Calculating Alpha Values

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Part L - Calculating Alpha Values

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Part L- Calculating Alpha Values

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?