REVIEWED BLD2020-0914+DETAILS+9.2.2020_11.25.16_AM23023 74TH Ave W, Edmonds, WA 98026
Energy (WSEC) and Mechanical considerations
Page 1
The house was built in the 1970's and portions will remain intact for this renovation. It is therefore not
possible to upgrade the entire building envelope to current energy code requirements. Where work will
be done, the intent is to upgrade the energy efficiency.
1. Window Replacements (see plan sheet 12.0) :
A. South wall: Reduction of roughly 40-50 SF of window area.
B. North wall: Reduction of about 3 SF of window area.
C. East wall: No windows presently. A 3 by 3 foot window will be added.
2. Insulation:
A. The crawlspace and attic will have major penetrations air sealed (electrical, plumbing,
bypasses, chaseways, etc.)
B. The existing insulation will be removed and replaced under entire floor of structure.
Replacement insulation will be batts installed under floor to minimum R-value of 30.
C. The existing insulation will be removed and replaced within accessible attic area (see
Figure 1). The replacement insulation will be blown -in to minimum R-value of 50.
D. Where exterior wall cavities are exposed for the work, the existing fiberglass batts will
be removed and replaced with minimum R-13 batts in the 2x4 wall cavity.
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FIGURE 1: ATTIC INSULATION PLAN
E. Vaulted ceiling in main room will be re -paneled with interior tongue and groove wood. In
the future when the roof needs replacement, we will supplement whatever batt
insulation is present above the portions of the vaulted ceiling which are inaccessible
unless we replace the roof structure.
23023 74TH Ave W, Edmonds, WA 98026
Energy (WSEQ and Mechanical considerations
Page 2
3. Heating/Mechanical:
A. The 1970's vintage electric forced air ducted heat will be replaced with Mini split ductless
heat pump zoned system. The old electric forced air heat furnace will be removed and
the ducts will be decommissioned in place. Exterior heat pump will be located on south
side of house per Figure 2.
B. Natural gas is not available to this property. Propane will be used for the new fireplace,
with a 120 gallon propane tank permitted separately. Propane tank will be located on
south side of house as shown on Figure 2.
C. Other mechanical work will be as needed for kitchen and laundry room remodels and
relocated master bath.
4. Miscellaneous:
A. New appliances and water saving fixtures will be used to the extent required by code.
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(E) WOOD DECK
38 sQ.FT.
-(E) OQNrR=
WALKWAY $ PATIO
859 SQ.Fr.
PROPERTY LINE 147.86' 989• 48' 00" E
7 .Fr_
1 (E) LAND39&PNG
120 gal propane tank (E) CL
OUT (E) GRAVEL ! ti
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(E) WOOD DECK
I 176 SOFT.
Heat pump I
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— — — — — — — — -- — — — — KIPMEfJO MMLE — — — --- EASEMENT
(E) WATER SEPME
- - - - - --PRDPERiY UNE 117.54' S69' 46' OO" E
FIGURE 2: PROPANE TANK AND HEAT PUMP PLAN