MECHANICAL DETAILSt.1.,
Whole House Ventilation
Whole house ventilation system to be installed per 2015 IRC sections M1507.3.1 through M1507.3.7
See whole house ventilation on the schedule sheet for specified option Wtd,WU'
IRC Table M1507.3.3(1)
Continuous Whole -House Mechanical Ventilation S rstem
System Airflow Rate Requirements
Airflow in CFM
Number of Bedrooms
Floor Area, SF_
2-3 4-5
< 1500
45 60
_
1,501- 3,000
60 75
3,001- 4,500
75 90
Run time percentage in each
(4) hour segment 25% 1 33% 1 50% 66% 1 75% I 100%
Factor 4.0 3.0 1 2.0 1 1.5 J 1.3 1.0
A. For ventilation system run time values between those listed, the factors
are permitted to be determined by interpolation.
B. Extrapolation beyond the table is prohibited by law.
IRC Table M1507.3.3(2)
Intermittent whole house mechanical ventilation rate factors
e-y.(_1--ew
subjected to
base for the
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Smoke Del
All smoke c
All detector
power from
interrupted.
such a man
All house
Carbon Mi
Alarms all i
code for all
alarms
Garages
Garages
assemblies
Dryer en
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IMC Setio
which alloy
tableW4q
Credits:
within the t
Option 2 Medium Dwelling Unit R460..2
permanent
2.5 credits required with R-2 occupancy
requiremer
Table R406.2 Summary of Credits claimed:
1a Efficient Building Envelope 0.5
Water Kea
2a Air leakage control and efficient ventilation 0.5
In seismic
3d High Efficiency HVAC 1.0
do to earth
5a Efficient Water Heating 0.5
vertical dirr
Total Credits claimed 2.5
Appliances
Each unit shall have the following:
pilot and bL
1. Envelope:
furnace an(
Roof: SIPS panels Min R38
by gravityti
Flat roof: R49
In additions
4.5" min R6.25/in foam at underside of plywood
installed pe
R28 + R21 min batt insulation below foam
Walls: Wood frame: Walls with R21 batt R21
Bui
Conc below grade: 1" rigid (R5) on outside face
to extend up to finish floor level, furred walls to have
1" of R5 rigid between conc and 2x4 studs
Grade Plan
with R15 batt R21
northern twr
Windows: maximum U value 0.28 % .
SE townhor
Floors: Slab under heated space to have continuous R10
rigid insulation, with min. 2' high perimeter insulation
Building Er
inside face of concrete walls R10
Bldg owner,
Wood framed fir's over unheated space, (garages) R38
this per Ci ,
2. Space Heating:
Building C:
Mini split system with inverter driven high efficient
Building s
HSPF elec. heat pumps
based on 3
3. Water Heating/Distribution:
High efficiency interior elec. heat pump water heater, min. EF>2.0
BUILDING
that would supply DHW to all the units through a central water loop
APPLICAB.
insulated with R-8 minimum pipe insulation.
2015 Interr
Low flow water fixtures throughout: showerhead and kitchen sink
2015 Inte
faucets installed in the house shall be rated at 1.75 GPM or less. All
2015 Int
other lavatory faucets shall be rated at 1.0 GPM or less.
2015 UNIF
4. Air leakage control & efficient Ventilation
2015 Wa
Per option 2a, Dwellings shall comply with M 1507.3 of the IRC, are
OCCUPA
each required to be tested and verified as having an air leakage rate
not exceeding 3.0 air changes per hour, Table R406.2. Fans to use
Multi Farri
Gara
a maximum 0.35 w/cfm, and not interlocked with the mini split
e
system.
T of U
Mechanical Ventilation criteria:
Full Spri
2 CFM Min efficacy of fan Max air
Allow tilde
F& flow CFM
R2 Occu
Range Hoods 100 2.8 CFM/watt any
Stories a.
Floor area
In line fan any 2.8 CFM/watt anyJ
/ Landry 90 2.8 CFM/watt any
JFirewallBathrm
The following components shall comply with WSEC
1. Exterior headers shall provide minimum insulation between heater and exterior
sheathing of R-10
Occupano
2. Ducts are required to be insulated to a minimum of R-8 per R403.3.1.
3. Mechanical system piping is required to be insulated to a minimum of R-6, per
FLOOR
R403.4.
Bell St. G
4. Hot water pipes are required to be insulated to a minimum of R-3, per R403.5.3
ntry Le
5. Mechanical ducts are required to be seal tested in accordance with 403.3.2. Testing
3rd Floor -
to comply with WSU RS-33.
4th Floor
6. 75% of all permanently installed lighting shall be high -efficacy R404.1
Total floor
Roof & below decks Insulation Criteria:
BuildingE
1. Roofing is not to peel and stick membrane set directly onto roof sheathing due to no roof
Building wi
ventilation is provided.
covenant,
2. Spray foam insulation to be:
a. Open cell, low density foam insulation.
b. Provide a thermal barrier, such as intumescent coating, on the underside of the spray
foam insulation prior to the installation of the fiberglass batt insulation.
Flo
Site/Parcel Data, Leaal DescrW..
OverallC
FLOOR AM
LOTS 17 AND 18 BLOCK 98 OF THE PLAT OF CITY OF EDMONDS, ACCORDING TO THE PLAT
Bell St. G
THEREOF RECORDED IN VOLUME 2 OF PLATS, PAGES 39 AND 39A, RECORDS OF
Ent Level
SNOHOMISH COUNTY AUDITOR.
3rd Floor
PARCEL No. 00434209801700
4th Floor
ADDRESS: 650 BELL STREET, EDMONDS, WASHINGTON 98020
Total floor°