Cool Home in a Heat Wave For Open Eco Homes 2020 / Cambridge Carbon - - PowerPoint PPT Presentation

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Cool Home in a Heat Wave For Open Eco Homes 2020 / Cambridge Carbon - - PowerPoint PPT Presentation

Jul 01, 2023 165 likes •463 views

Cool Home in a Heat Wave For Open Eco Homes 2020 / Cambridge Carbon Footprint 17 June 2020 Tom Bragg, CCF Trustee Margaret Reynolds, Architect, M Reynolds RIBA tom@openecohomes.org mrriba@btinternet.com

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Cool Home in a Heat Wave

For Open Eco Homes 2020 / Cambridge Carbon Footprint 17 June 2020 Tom Bragg, CCF Trustee Margaret Reynolds, Architect, M Reynolds RIBA tom@openecohomes.org mrriba@btinternet.com http://uk.linkedin.com/in/margaretreynoldsriba

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Cool Home in a Heat Wave

1 – Shading & thermal mass - Margaret Q & A 2 – Ventilation & insulation – Tom Poll 2 3 - Avoiding accidental overheating - Tom 4 – Personal cooling - Tom

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Cool Home in a Heat Wave

SHADING - Some BASICS: 1 – Materials absorbing heat/ thermal mass 2 – Seasonal & daily sun on your house

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Materials and heat

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1 – Dense materials - concrete, brick, stone - absorb more heat & solar radiation, and they release it

  • slowly. = greater “Thermal Mass”

– metals absorb and release heat quickly - conductors 2 – Insulation foam, & timber generally absorb less heat = have less “Thermal Mass” 3 – Glass (even double & triple glazing) transmits heat 4 – Surfaces can reflect heat

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Windows & glazed doors

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Sunshine & Daylight

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1 – To stay cool you need to know which parts of your home receive sun/light and WHEN 2 – North exposure shady, East = morning sun, West = afternoon sun, South, sunny 3 – You also need to know the outdoor temperature, or at least when it is cooler out than in

Source: www.coltinfo.co.uk

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Internal Shading

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1 – Roller Shades 2 – Blinds: vertical & horizontal vertical “closed” deflecting sun rooflight

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Sun & Horizontal blinds

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Blinds “closed” Blinds horizontal

Summer: sun @ 61 deg Some reflected light View out OUT IN Summer: sun @ 61 deg Sun blocked Only reflected light Some view out OUT IN

Blinds to block sun

Summer: sun @ 61 deg shines in, heats inside surfaces No view out OUT IN

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Cool Home in a Heat Wave

SHADING – Internal & External VIDEO

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External shading – slats & shutters

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3 –

Save

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External shading - rooflights

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External awning blind transmits 4% - 14% of heat

Fakro, installed 2020: Put in place for summer season Velux, installed 2010

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Fabric shades & sails

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Harry Paticas, Archt Bamboo roller screen

Bronwen Barry Archt

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Solar louvres – Wimbish PH

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Wimbish Passiv Haus – porch louvres

https://passivhaustrust.org.uk/UserFiles/File/Projects/Awards2012/Presentations/2012UKPHAw ards_Wimbish.

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Solar louvres for Cambridge

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Cambridge min 14.4 deg spacing 130 Cambridge max 61.2 deg 30 150

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Electronic external blinds

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Denby Dale Passiv Haus

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Cool Home in a Heat Wave

1 – Shading –Summary

  • When and where is the sun?
  • Internal shading
  • External shading

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Cool Home in a Heat Wave

1 – Shading & thermal mass - Margaret Q & A 2 – Ventilation & insulation – Tom Poll 2 3 - Avoiding accidental overheating - Tom 4 – Personal cooling - Tom

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Cool Home in a Heat Wave

For Open Eco Homes 2020 / Cambridge Carbon Footprint 17 June 2020 Tom Bragg, CCF Trustee Margaret Reynolds, Architect, M Reynolds RIBA tom@openecohomes.org mrriba@btinternet.com http://uk.linkedin.com/in/margaretreynoldsriba

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Ventilation

When it’s Hot outside:

shut doors, windows & vents

  • if they let in hot air

When it’s cool outside:

Open windows, skylights, vents at bottom & top of house for a single-aspect flat:

  • r across your home

a fan may help

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Security for r Night Cooling

Look for Secured By Desig ign

Side hung Top hung Tilt & turn

Secure:

Ventlock for Sash windows

Do you have a problem with external noise or pollution?

Poll

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In Insulation

Lofts, Roofs, Walls

Hot pipes, tanks

Slate roof surface at 74.4°C Multifoil insulation

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Ext xternal Su Surfaces

In Internal

Thermal l mas ass in insi side

Thermal mass

48.3°C 7.5°C cooler

So Solid lid Wall In Insula lation

Ext xternal

Steadies the temperature

Brick, stone, concrete

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Accid idental l Heatin ing

What’s missing?

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Efficient appliances & Tech

Energy labels

Find efficient appliances & Tech

and swit itch them off when not in use….

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Personal Cooling

  • drinks, cool showers, fans, spray
  • loose, light clothes
  • ‘hot’ water-bottle in the freezer
  • consider sleeping where it’s cooler
  • beware heat exhaustion/ heatstroke
  • avoid going out, exertion at midday
  • look out for your neighbours:
  • ld, young, vulnerable
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Mark Brinkley’s self-build

Tues 23rd June 6:30-7:30pm - Free Registration

  • low G glass to avoid summer overheating
  • MVHR for filtered fresh air: auto summer bypass
  • 3.5 kW PV : excess electricity to hot water heating
  • Low Energy Building Standard – “Passivhaus-lite”
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More Online tours

Sept - 0ct

More Webinars soon: Better Insulation

Heat pumps

Th Thermal l Im Imagin ing train inin ing, g, lo loans : : Autumn??

Resources: Staying Cool in a Heatwave CCF online resource How to Keep Cool in Summer Transition Cambridge

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Tom Bragg tom@openecohomes.org Margaret Reynolds mrriba2018@gmail.com

Enjo joy the hot weather

Donations: cambridgecarbonfootprint.org/donate Thanks for taking part, Pls write in Chat: something good & something to improve