2. DEAP: New Build, Retrofit & Renewables
Current Building Regulations
Residential - A3
Non-Residential - 2005
Retrofit
Future Building Regulations to meet EPBD/EED (nZEB)
Residential to nZEB
Non-Residential to nZEB
Retrofit to nZEB
Renewables requirement in DEAP
Case Study: BRE Scotland,
Case Study: Galway Passive House Retrofit
3.
4. DEAP – Dwelling Energy Assessment Procedure
Only acceptable proof of
compliance with Part L for
new build
EPC < 0.400 and
CPC < 0.460
Does not yet apply to
retrofit, extensions or
material changes
BER required if grants are
sought from SEAI
BER required for property
sale, lease of all properties
5. DEAP – calculation of energy systems
Primary energy and CO2
factors for space heating
11. DEAP – Effect of PE reduction to 1.4
Dwelling built in 2013 with air/water heat pump, PV panel and underfloor heating
12. DEAP – Effect of PE reduction to 1.4
Dwelling built in 2013 with air/water heat pump, PV panel and underfloor heating
2014 BER assessment 2024 BER assessment
1.0 ach 6.7 ach
13. DEAP – Effect of airtightness
Dwelling designed in 2014 with air/water heat pump, PV panel, radiators and MVHR
6.7 ach
1.0 ach
14. DEAP – Effect of airtightness + PE factor
Dwelling designed in 2014 with air/water heat pump, PV panel, radiators and MVHR
6.7 ach
1.0 ach 1.0 ach + 1.4 PEf
15. PHPP – Effect of airtightness
Passive House retrofit designed in 2012 with air/water heat pump, radiators and MVHR
Typical Irish
New Build
to Part L 2011
6.7 ach
Good Irish
Passive
House Retrofit
0.37 ach
16. Simplification of RES for New Build
2008 (BER of B3) 2014 (BER of A3)
Wood pellet boiler
Pellet storage & delivery
Radiators & Underfloor
Solar Thermal
200ltr HWC
Immersion backup
3 zones time control
20,000 kWh/y
€16,000
140 man-hrs, 3 subcontractors
High maintenance cost
Heat pump
Low temp radiators
PV array
300ltr Accumulator
Immersion backup
Time/temp/compensation
6,000 kWh/y
€13,000
70 man-hrs, 1 subcontractor
Low maintenance cost
18. Building Regulations for Retrofit
0.1.3 Existing dwellings
0.1.3.1
This amendment applies to all works to
existing dwellings that are covered by
the requirements of the Building
Regulations, including extensions,
material alterations, material changes of
use and window and door replacement.
In carrying out this work, the aim should
be to limit energy requirements for the
operation of the dwelling and associated
CO2 emissions as far as practicable as
required by Regulation L1.
Specifically, Regulation L2(d) provides
that replacement oil and gas boilers
should achieve a seasonal efficiency of
90% where practicable. The key issues
to be addressed are: -
19. Building Regulations - RETROFIT
Main Requirement Applicability
Fabric insulation:
- sub-sections 2.1.2 and 2.1.3
Backstop U-values, Glazing area %,
LTB, Condensation Risk Analysis,
Air tightness:
- sub-section 2.1.4
Specify, detail, inspect and record
installation (no testing required)
Boiler efficiency:
- sub-section 2.2.2
90% efficient from HARP database
Building Services Controls:
- sub-section 2.2.3
Time and temperature control to
extension, remainder retained as is
Insulation of pipes, ducts and
vessels:
- sub-section 2.2.4
Insulate any modifications to the
primary pipework, or any running
outside of the thermal envelope
20.
21.
22.
23. Energy Performance of Buildings Directive
Article 9
(a) by 31 December 2020, all new buildings are nearly zero-energy
buildings; and
(b) after 31 December 2018, new buildings occupied and owned by public
authorities are nearly zero-energy buildings
Member States shall draw up national plans for increasing the number of
nearly zero-energy buildings. develop policies and take measures such as
the setting of targets in order to stimulate the transformation of buildings
that are refurbished into nearly zero-energy buildings, and
Article 5
Cost optimal retrofitting based on LCA
Article 7
More than 25% of surface area retrofitted
24. Building Regulations – Part L, 2016?
0.1.3 Existing dwellings …
Where over 25% of surface
area is effected by the
works (e.g. window
replacement)
Energy performance must
be nZEB (possibly a BER of
A2?)
Can be achieved in one or
more steps as part of a
strategic plan
But must be based on an
economic appraisal (LCA) of
what is “cost optimal”
40. Case Study – Passive House retrofit
Passive House Systems
4.5kW A-W Heat Pump
3 low temp radiators
250ltr Accumulator HWC
MVHR with post-heater
1,800 kWh/y space heat demand
€15,000
100 man-hours, 1 contractor
Low maintenance
41. PHPP Retrofit – Certification Pending
Passive House retrofit designed in 2012 with air/water heat pump, radiators and MVHR
BER?
…
B1
42.
43. PHPP Retrofit – Certification Pending
Passive House retrofit designed in 2012 with air/water heat pump, radiators and MVHR
44. DIT School of Architecture, Bolton St
Advanced professional courses for Assigned, Design and Ancillary
Certifiers under S.I. 9 2014 (Engineers, Architects, Surveyors and
Architectural Technologists)
Postgraduate Certificate in Digital Analysis & Energy Retrofit
1 year part-time, Fridays, €2,350
MSc in Energy Retrofit
2.5 years part-time, Fridays, €2,350 per year
Postgraduate Certificate in Linear Thermal Bridge modelling
15 weeks part-time €1,200 (NSAI Registered)
45. Follow me on twitter: @PassiveLogical
Simon McGuinness MRIAI, Dip.Arch., B.Arch.Sc., CEPHD
Editor's Notes
From the most contaminated industrial site in Europe to BREEAM excellent – remediation of the built environment.
From the most contaminated industrial site in Europe to BREEAM excellent – remediation of the built environment.
From the most contaminated industrial site in Europe to BREEAM excellent.