Green needham nsl weatherization colonials and ranches
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Weatherizing Ranch and Colonial Style Homes 1. Identifying Weatherization Opportunities and Challenges in a Ranch or Colonial 2. Using Mass Save to make these homes more energy efficient!
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Green Needham / Next Step Living Weatherization Seminar for owners of Colonials and Ranches
Transcript of Green needham nsl weatherization colonials and ranches
Weatherizing Ranch and Colonial Style Homes1. Identifying Weatherization
Opportunities and Challenges in a Ranch or Colonial
2. Using Mass Save to make these homes more energy efficient!
Green Needham CollaborativeIn 2012, Green Needham and Next Step Living have: Signed up 850 residents for home
energy assessments 524 completed Energy Assessments in
2012 These assessments resulted in 155
weatherization jobs, which saved homeowners on average $500/year
Mass Save
WEATHERIZATION
A comfortable, safe, and energy-efficient home requiresContinuous thermal boundaries and air barriers that are in contact with one another. (US.DOE)
Ranch Style Homes
• Many Built from 1940’s to Today• Easy To Install cost effective Insulation and Air
Sealing• Good Solar PV Potential!
Wall Insulation in a Ranch Pre 1950: Possible that
only a 1” sheet of aluminum foil like insulation present
This can be improved through blown in cellulose
Post 1950, most likely have a 3” Fiberglass batt, which can’t be improved on through Mass Save and blown in cellulose
Dense pack Cellulose: Air and Thermal Barrier
Source:http://www.energysmartvt.com/media/dense-pack-insulation-exterior-preparation-3-400x300.jpg
Interior Dense Pack Insulation
Split Level Ranch Features 2 Attic Spaces
2 Attic Hatches or Doors
Changes in Ceiling Height
Changes in Ceiling Height
ConditionedSpace
ConditionedSpace
Attic
Not only is the top of the wall uninsulated...
Not only is the top of the wall uninsulated...
IDENTIFYING & AIR SEALING THE BUILDING ENVELOPE
Graphic courtesy of Anthony Cox
Changes in Ceiling Height
The interior wall cavities act as a chimney that robs the house of heat and conditioned air.
The interior wall cavities act as a chimney that robs the house of heat and conditioned air.
IDENTIFYING & AIR SEALING THE BUILDING ENVELOPE
Graphics courtesy of Anthony Cox
Attic or Wall Hatches
Thermal Boundary
Air Barrier
An uninsulated attic hatch is a gap in the attic’s thermal boundary.
Insulating Wall Hatches and Attic Hatches
www.oldhouseweb.com
Pull Down StairsThermadome free with Air Sealing (Value $200) Yearly Savings $60 and Up!
Thin plywood only barrier to cold attic. Big area of heat loss!!
Whole Home Fan Boxes
• Good for cooling in summer• Can be Health and Safety
Concern (Combustion Safety and BackDrafting)
In the winter, even with vents closed, area of great heat loss! Treat with Fan Box (Thermadome)
ColonialWeatherization Areas to Focus on: Wall Insulation Unfinished Attic
Insulation + Air Sealing
Treating walk up stairs to Attic
If the homeowner uses the attic fairly often:
Walk-Up Attics
• The air and thermal boundaries must be established at the stairs, stairwell walls, and door to the attic stairs.
• This approach leaves the stairwell open to the attic and outside the conditioned space.
IDENTIFYING & AIR SEALING THE BUILDING ENVELOPE
Graphic developed for the US DOE WAP Standardized Curricula
Walk Up Stairs to Attic
Door
Photo courtesy of the US Department of Energy
Photo courtesy of the US Department of Energy
The door is insulated and weather-stripped.The door is insulated and weather-stripped.
Photo courtesy of the US Department of Energy
Attic Spaces in a Colonial
Un-floored Floored
Open Blown cellulose OBC up to 11” R 30
Dense Pack Cellulose 6” R 18 + Air sealing at same time
Air Sealing An Attic
Attic Insulation: Open Blown Cellulose
Source:http://www.buildinggreentv.com/files/images/atticInsulAweb.preview.jpg
IDENTIFYING & AIR SEALING THE BUILDING ENVELOPEAir Barrier
A mechanical chase containing ducts can break the attic’s air barrier.
Thermal Boundary
Air Barrier
Graphic developed for the US DOE WAP Standardized Curricula
Air sealing Chimney Chases
Before After
1-2” Gap All Around Chimney: Allowing energy to escape from inside home
Add metal flashing and fire caulking to seal up the gap
Ventilation Types Mushroom Vent Roof Vent
Ridge vent Soffit vents
Ventilation Bath fans Improperly
vented will cause moisture problems in attic
Will also recommend adding an insulated ventilation pipe cover. Why?
1sf of ventilation for every 300sf of attic space
Propavents
Heat Loan Helps Support High Efficiency Heating Systems: Oil
Customers can save 40% in heating costs by switching
Single Pane to Double Pane Windows Conversion: Least Cost Effective but may be necessary with older homes
Heat Pumps
Why use a Total Climate Control:• CONTROL: Room-by-room heating and cooling in a single
unit
• AIR QUALITY: Filtered air circulation that improves indoor air quality
• SAVINGS: Up to 40% less expensive to heat your home than oil and more efficient cooling than central air or window units
• EASY INSTALL: No duct work or need to remove your current heating system
NSL has partnered with Mitsubishi to offer their ductless mini-split heating and cooling system
The Total Climate Control System Integrates Into Your Home’s Decor
Questions and CommentsMichael Cucchiara
Community Programs ManagerNext Step Living917-612-9190
