Heating and Cooling with Mini Splits in the Northeast

Kohta Ueno

Heating and Cooling with Mini Splits

in the Northeast

October 23, 2014

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Background

2014 BA Webinar Mini Splits in Northeast

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Overview

? Transformations, Inc.

currently building net-zero

homes in Massachusetts

? Mini split heat pumps

(MSHPs) part of builder¡¯s

strategy: tradeoff package

? Single point of heating/

cooling on each floor

? BA study of temperatures

throughout house, energy

use of MSHPs

2014 BA Webinar Mini Splits in Northeast

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Full Report Available

? 140 page brick of a report

? Reports has details,

presentation is overview

? Currently in final review

? If taking notes¡­ relax

2014 BA Webinar Mini Splits in Northeast

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Transformations, Inc. Enclosure/Shell

? Triple glazed windows

? 1 ACH 50 typical

Asphalt shingles

Fully-adhered membrane

ZIP System? roof sheathing

18" cellulose

insulation

2x10 rim joist

2x4 studs @ 16¡± o.c.

(2) 2x6 P.T. sill

Baffle

Capillary break applied to

top of foundation wall

1

/2" gypsum board

8¡± min.

High density spray foam

insulation

1

/2" gypsum board (optional)

2x4 P.T. studs @ 24¡± o.c.

(optional)

Free-draining

backfill

Intumescent paint

Dampproofing below grade

High density spray foam

insulation

2x4 studs @ 16¡± o.c.

Filter fabric

Siding

12¡± low density spray foam

cavity insulation (R-47)

Low density spray foam at

rim joist

1

/2¡± gypsum board

4¡± concrete slab

6 mil polyethylene

Gravel (no fines)

ZIP System? wall sheathing

10¡± concrete

foundation wall

2¡± XPS rigid insulation

Perforated

perimeter drain

Capillary break: dampproofing, cementitious

coating, or membraneapplied to top of footing

2014 BA Webinar Mini Splits in Northeast

Compacted fill

10¡± x 20¡± concrete

footing

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