ME-KWA-MOOKS NET-ZERO

Located on a steeply sloped triangular lot in West Seattle adjacent to Me-Kwa-Mooks Park, this transformative Japanese inspired remodel was designed to improved access to the home, connect to views of the greenbelt and frame territorial views over Puget Sound, all while improving interior flow. This house is also on track to achieve net-zero energy efficiency.

PERFORMANCE UPGRADES

High performance envelope with ACH of 1.2

Exterior insulation

High Performance windows, GLO Triple Pane Passive House

High efficiency HVAC

Solar panels

Dual electric car chargers

CURRENT HOUSE PERFORMANCE W/ UPGRADES

Total Project Energy Use Index (Total EUI) = 10.3 kBTU/sf-yr

Grid Project Energy Use Index  (Total EUI) = 3.9 kBTU/sf-yr (this excludes energy offset by PV)

MECHANICAL

Heating cooling – High Efficiency Epoxy Coated 3 Ton Mitsubishi Electric Heat Pump 

Heat Recovery Ventilator (HRV) – Life Breath 205Max 

High Efficient Water Heater – Rheem Professional Prestige Hybrid Electric Heat Pump 

Low flow plumbing fixtures 1.75 – 1 GPM or less

SOLAR

System Size – 10.95kw

Power Offset – 71.6%

Approximate Cash Positive = 12.2 years (based off typical house and their usage)

(2) Tesla Car Chargers

ENVELOPE

Blower door test – ACH @ 50 Pa  = 1.23

Windows/Doors – Average Weighted U-Value = .19 

Exterior Wall R-Value = R24+continuous R8 (TOTAL = R32)

Roof R-Value = R65

Floor R-Value = R53++continuous R8 (TOTAL = R61)

PROJECT INFO

Location | Seattle, WA

Project Architect | Aaron Trampush

Architect of Record | SHED Architecture & Design

Contractor | Dowbuilt

Structural Engineer | Todd Perbix

Metal Siding | VSM Sheet Metal

Cabinets | Whidbey Design Works

Concrete | Bayshore Concrete

Interior Steel | Alpine Welding

Solar | Artisan Electric

Enclosure Consultant | RDH Building Science

Windows and Doors | Washington Window and Doors

Photography | Rafael Soldi, Tony Kim (aerial)

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