Geelong Sustainability Clever Living Seminar Series 2018 ... · hydronic floor heating • 1,426 kg...

Geelong Sustainability

Clever Living

Seminar Series 2018

Tim Adams

F2 Design

Seminar 1: Why Good Design Doesn’t Cost The Earth

Design solutions make the difference - not money

• Allocate time and energy to getting the design working as efficiently as possible

• Numerous studies including those by Sustainability House and CSIRO have shown design solutions provide the principle pathway not materials and construction system specification

• For comparable performance, Build Cost is less for high performance design compared to specification changes to existing designs

Geelong Sustainability - Clever Living Seminar Series 2018

Building conditioning• One-off costs of improvements to the building

fabric will reduce size and running costs of heating and cooling appliances – zero net cost

• Smaller appliances working for shorter periods deliver reduced utilities bills for the life of the building

• Energy Recovery Ventilation (ERV or HRV) systems may be needed if the building envelope is very tightly sealed



1975 1985 2005

Australian publications


2017This Plan is the first

comprehensive,

nationwide retrofit plan

for Australia’s building

sector. It demonstrates

how all existing buildings

can reach zero emissions

within ten years.


Zero Carbon Australia Buildings PlanExisting buildings can reach zero emissions by retro fitting houses with:

• double-glazing, better insulation & draft sealing

• low wattage lighting

• induction cook tops (not gas)

• reduced waste & rooftop solar

• Plus point of use energy use information devices to inform householders how their behaviour patterns may be modified

• $40b in 10 years

Key retro-fit elements

• LED light fittings - reduce power consumption by 80% compared to low voltage dichroic fitting of equal output

• Daiken US7 AC - has a COP of 6 which delivers 6kW of conditioning with 1kW electricity

• Heat pump hot water units - save 66-77% of electricity compared to resistance element type

• Point of use energy consumption data - saves 17%


Tools & frameworks

* NatHERS * FirstRate

*BERS * Accurate

* NABERS * GreenStar

* Residential Efficiency Scorecard

* One Planet Living

* Living Building Challenge

* Biomimcry * LEED * BREEAM

* Passivhaus … lots of tools


Energy usage & Star ratings

• 2000 - 2.5 Star house used 321mj/M2

• 2010 - 6 Star house used 114mJ/M2

• An 8 Star house uses 54mJ/M2 - a 53 % improvement

• A 9 Star house uses 25mJ/M2 - a 78 % improvement

NatHERS values for average Melbourne home



FirstRate Diagnostic Report

4th Oct 1pm 10 degrees East of North



• Create zones within house & heat and cool them rather than whole house

• Prioritize performance for the parts of the house used during daytime waking hours

• Draft seal doors and windows, gaps and cracks, fixed vents and exhaust fans

• Operate blinds, curtains and external awnings

• High level exhaust outlet points for summer night purging ventilation

• Air locks, especially for low thermal mass, low passive solar gain houses

Simple strategies


Resistance to heat flow – R-value

- Clear Single Glazing/timber frame R0.19 U5.40

- Clear Double Glazing/timber frame R0.33 U3.00

- Clear Triple Glazing/timber frame R0.57 U1.76

- Brick veneer wall inc R2.5 insulation R3.0

& single side foil building wrap

- Roof including R3.5 insulation R6.0

& R1.3 foil faced blanket sarking

- Concrete slab on ground with R1 insulation R1.84

- Timber floor with R1 insulation (ventilated sub-floor) R1.4

Timber floor with R1 insulation R2.0

(un-ventilated sub-floor)

Ref – ICANZ Insulation Handbook


Reverse Cycle Inverter technology air conditioners are

continually improving

Daikin US7 has Winter COP 5.8 & Summer COP 5.9


Photovoltaic panels continue to improve

These have an efficiency rating of 19.5%

They have a peak output of 330w

1.686m x 1.016m = 1.7sqm

Similar sized panels 6 years ago peaked at 180-250w


Rated Capacity Winter 3.6kW

Summer 2.5kW

Capacity Range Winter 0.6-7.5kW

Summer 0.6-3.9kW

Power use Winter 0.62kW

Summer 0.42kW

PV Panel Daily output per kW max

Mid Winter PV output 2kWh/kW

Mid Summer PV output 6kWh/kW

Annual Average 4kWh/kW

Passive versus active heating


Active heating

2400W 11 fin oil column heater with COP 1 costs $119

to buy & $0.65/ hr or $3.90/day to run in winter

Passive heating5 sqm clear glass window

costs $2,500 to buy & $0/day to run in winter


Tesla Powerwall 2

13.5 kWh storage

5kW steady & 7kW peak

$8,000 + GST & install

37,800 kWh storage warranty

$0.24c per kWh

We import 2,300kWh P/A

= 16 years warranty

Geelong Sustainability Clever Living Seminar Series 2018

Drysdale HouseHIA GreenSmartAward Finalist 2017SO’R Construction


First Floor and RoofGround Floor


Anne’s 7+ star home in Drysdale


Nissan HouseBDAV 10 STAR ChallengeFinalist 2014

Edible HouseBDAV 10 STAR ChallengeFinalist 2013


Finalist - Cape Paterson 10 Star House

Remove north side passage

Remove greenhouse

Make north eave adjustable

Move bed 2 to north side

Move bath to south east corner

Reduce area of south side windows

Mobile robes for bed 2 & 3

No need for wood combustion

heater


A 10 Star house is a precision instrument where all attributes conspire interactively to deliver the ultimate result. General principles provide a starting point but assumptions must be vigorously tested to understand how each zone reacts when properties are adjusted.

Improvements from 9.2 to 9.9 Stars

Fine tuning to 10 Star score

Swings and roundabouts, with different options effecting the result in each zone



The House With No Bills

House technologies & performance

• 3kW PV system provides 4,500 kWh P/A • 130% of power consumed with 73% of generation

exported and 65% of use imported• 60 evacuated tube solar hot water with Famar 23kW

fireplace/boiler backup for domestic hot water and hydronic floor heating

• 1,426 kg of air dried timber burned in 2016 equivalent to 1,039kWh with Sanden electric heat pump (COP 4.5)

• Worm based black water treatment• 120,000l water storage in 3 tanks


Knowledgenot money:That’s what makes the difference!

You can do it too!


Geelong Sustainability Clever Living Seminar Series 2018 ... · hydronic floor heating • 1,426 kg...

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