HomeMy WebLinkAboutM18-000003 - mechanicalFrom: oronoinspector@ci.orono.mn.us
Sent: 09/11/2018 - 08:34 AM
To: sandy@sabreheating.com
CC:
Subject: Inspection Report Individual
Inspection Report
2868 WOOD DUCK TR
Permit Number: M18-000003
Site Address: 2868 WOOD DUCK TR, LONG LAKE, MN 55356
Property Owner: WEEKLEY HOMES LLC
Description: NEWS RESI SING
Inspection Date: 09/11/2018
Inspection Type: Mechanical - Final
Inspection Results: Permit Finaled
Inspection Status: General Comment
CITY OF ORONO
2750 KELLEY PARKWAY
ORONO, MN 55356
PH: (952) 249-4600
FAX: (952)249-4616
1. Gas line manometer is holding. ERV is self balancing. Aeroseal and duct air test results posted. Bath fans OK. Range hood is OK. Exterior hoods are labeled.
All work complete, permit finaled. Jim H.
Sincerely,
,--5 -
Roger Peitso
Building Official
952-249-4625
To schedule your inspections please call: (952) 249-4600
To schedule your inspection online Click Here
CODE REQUIREMENTS ARE FOR YOUR PERSONAL HEALTH AND SAFETY!
Site address 7826 Peachvale I Date 12/07/2016
Contractor Sabre Heating and A/C
Completed
Josh G.
Section A
Ventilation Quantity
(Determine quantity by using Table R403.5.2 or Equation 11-1)
Square feet (Conditioned area including
4434
Total required ventilation
180
Basement—finished or unfinished)
Total and Continuous Ventilation Rates
J G
90
Continuous ventilation
Number of bedrooms
Number of Bedrooms
Directions - Determine the total and continuous ventilation rate by either using Table R403.5.2 or equation 11-1.
The table and equation are below
Table R403.5.2
Total and Continuous Ventilation Rates
in cfm
Number of Bedrooms
1
2
3
4
5
6
Conditioned space (in
so. ft.1
Total/
continuous
Total/
Total/
continuous
Total/
continuous
Total/
Total/
rnntiniir)iic.
1000-1500
60/40
75/40
90/45
105/53
120/60
135/68
1501-2000
70/40
85/43
100/50
115/58
130/65
145/73
2001-2500
80/40
95/48
110/55
125/63
140/70
155/78
2501-3000
90/45
105/53
120/60
135/68
150/75
165/83
3001-3500
100/50
115/58
130/65
145/73
160/80
175/88
3501-4000
110/55
125/63
140/70
155/78
170/85
185/93
4001-4500
120/60
135/68
150/75
165/83
180/90195/98
4501-5000
130/65
145/73
160/80
175/88
190/95
205/103
5001-5500
140/70
155/78
170/85
185/93
200/100
215/108
5501-6000
150/75
165/83
180/90
195/98
210/105
225/113
Equation 11-1
(0.02 x square feet of conditioned space) + [15 x (number of bedrooms + 1)] = Total ventilation rate (cfm)
Total ventilation —The mechanical ventilation system shall provide sufficient outdoor air to equal the total ventilation rate
average, for each one-hour period according to the above table or equation. For heat recovery ventilators (HRV) and energy
recovery ventilators (ERV) the average hourly ventilation capacity must be determined in consideration of any reduction of
exhaust or out outdoor air intake, or both, for defrost or other equipment cycling.
Continuous ventilation - A minimum of 50 percent of the total ventilation rate, but not less than 40 cfm, shall be provided,
on a continuous rate average for each one-hour period. The portion of the mechanical ventilation system intended to be
continuous may have automatic cycling controls providing the average flow rate for each hour is met.
Section B
Ventilation Method
(Choose either balanced or exhaust only)
Balanced, HRV (Heat Recovery Ventilator) or ERV (Energy Recovery❑
Exhaust only
Ventilator) —cfm of unit in low must not exceed continuous
Continuous fan rating in cfm
ventilation ratingby more than 100%.
Low cfm:��
High cfm:
QG
v V
Continuous fan rating in cfm (capacity must not exceed
continuous ventilation rating by more than 100%)
Directions - Choose the method of ventilation, balanced or exhaust only. Balanced ventilation systems are typically HRV or ERV's.
Enter the low and high cfm amounts. Low cfm airflow must be equal to or greater than the required continuous ventilation rate and
less than 100% greater than the continuous rate. (For instance, if the low cfm is 40 cfm, the ventilation fan must not exceed 80 cfm.)
Automatic controls may allow the use of a larger fan that is operated a percentage of each hour.
Section C
Ventilation Fan Schedule
Description Location Continuous Intermittent
Directions - The ventilation fan schedule should describe what the fan is for, the location, cfm, and whether it is used for continuous
or intermittent ventilation. The fan that is chose for continuous ventilation must be equal to or greater than the low cfm air rating
and less than 100% greater than the continuous rate. (For instance, if the low cfm is 40 cfm, the continuous ventilation fan must not
exceed 80 cfm.) Automatic controls may allow the use of a larger fan that is operated a percentage of each hour.
Section D
Ventilation Controls
(Describe operation and control of the continuous and intermittent ventilation)
ERV has wall control set to 30%=93 CFM
ERV has wall control set to 60%=186 CFM
Directions - Describe the operation of the ventilation system. There should be adequate detail for plan reviewers and inspectors to verify design and
installation compliance. Related trades also need adequate detail for placement of controls and proper operation of the building ventilation. If exhaust fans
are used for building ventilation, describe the operation and location of any controls, indicators and legends. If an ERV or HRV is to be installed, describe how
it will be installed. If it will be connected and interfaced with the air handling equipment please describe such connections as detailed in the manufactures'
installation instructions. If the installation instructions require or recommend the equipment to be interlocked with the air handling equipment for proper
operation, such interconnection shall be made and described.
Directions -In order to determine the makeup air, Table 501.4.1 must be filled out (see below). For most new installations, column A will be appropriate, however, if
atmospherically vented appliances or solid fuel appliances are installed, use the appropriate column. Please note, if the makeup air quantity is negative, no additional makeup air
will be required for ventilation, if the value is positive refer to Table 501.4.2 and size the opening. Transfer the cfm, size of opening and type (round, rectangular, flexor rigid) to
the last line of section D.
Table 501.4.1
PROCEDURE TO DETERMINE MAKEUP AIR QUANITY FOR EXHAUST EQUIPMENT IN DWELLINGS
(Additional combustion air will be required for combustion appliances, see KAIR method for calculations)
One or multiple power
One or multiple fan-
One atmospherically vent
Multiple atmospherical -
vent or direct vent ap- pliances
assisted appliances and power
gas or oil appliance or one solid
ly vented gas or oil appliances
or no combus- tion appliances
vent or direct vent appliances
fuel appliance
or solid fuel appliances
Column D
Column A
Column B
Column C
1.
0.15
0.09
0.06
0.03
a) pressure factor
(cfm/sf)
b) conditioned floor area (sf) (including
4434
unfinished basements)
Estimated House Infiltration (cfm): [1a
665
x lb]
2. Exhaust Capacity
a) continuous exhaust -only ventilation system
ERV=O
(cfm); (not applicable to ba- lanced ventilation
systems such as HRV)
b) clothes dryer (cfm)
135
135
135
135
c) 80% of largest exhaust rating (cfm);
Kitchen hood typically
240
(not applicable if recirculating system or if
powered makeup air is electrically interlocked
d) 80% of next largest exhaust rating
Not
(cfm); bath fan typically
Applicable
(not applicable if recirculating system or if
powered makeup air is electrically interlocked
Total Exhaust Capacity (cfm);
375
[2a + 2b +2c + 2d]
3. Makeup Air Quantity (cfm)
375
a) total exhaust capacity (from above)
b) estimated house infiltration (from
665
above)
Makeup Air Quantity (cfm);
—3b]
(if
(if value is negative, no makeup air is needed)
L
_29O
4. For makeup Air Opening Sizing, refer
NOT REQ.
to Table 501.4.2
A. Use this column if there are other than fan -assisted or atmospherically vented gas or oil appliance or if there are no combustion appliances. (Power vent and direct vent
appliances may be used.)
B. Use this column if there is one fan -assisted appliance per venting system. (Appliances other than atmospherically vented appliances may also be included.)
C. Use this column if there is one atmospherically vented (other than fan -assisted) gas or oil appliance per venting system or one solid fuel appliance.
D. Use this column if there are multiple atmospherically vented gas or oil appliances using a common vent or if there are atmospherically vented gas or oil appliances and solid
fule appliances.
Table 501.4.2
Makeup Air Opening Sizing Table for New and Existing Dwelling Units
Notes:
A. An equivalent length of 100 feet of round smooth metal duct is assumed. Subtract 40 feet for the exterior hood and ten feet for each 90- degree elbow to
determine the remaining length of straight duct allowable.
B. If flexible duct is used, increase the duct diameter by one inch. Flexible duct shall be stretched with minimal sags. Compressed duct shall not be accepted.
C. Barometric dampers are prohibited in passive makeup air openings when any atmospherically vented appliance is installed.
D. Powered makeup air shall be electrically interlocked with the largest exhaust system.
Combustion air
Not required per mechanical code (No atmospheric or power vented appliances)
v/ Passive (see IFGC Appendix E, Worksheet E-1) Size and type 3 inch ridged, 4 inch flex
Other, describe:
Explanation - If no atmospheric or power vented appliances are installed, check the appropriate box, not required. If a power vented
or atmospherically vented appliance installed, use IFGC Appendix E, Worksheet E-1 (see below). Please enter size and type. Combustion
air vent supplies must communicate with the appliance or appliances that require the combustion air.
Section F calculations follow on the next 2 pages.
One or multiple power
vent, direct vent ap-
pliances, or no combus-
tion appliances
One or multiple fan-
assisted appliances and
power vent or direct vent
appliances Column B
One atmospherically vented
gas or oil ap-
pliance or one solid fuel
appliance
Multiple atmospherically
vented gas or oil ap-
pliances or solid fuel
appliances
Duct di -
ameter
Passive opening
1-36
1-22
1-15
1-9
3
Passive opening
37-66
23-41
16-28
10-17
4
Passive opening
67-109
42-66
29-46
18-28
5
Passive opening
110-163
67-100
47-69
29-42
6
Passive opening
164-232
101-143
70-99
43-61
7
Passive opening
233-317
144-195
100-135
62-83
8
Passive opening
w motorized damper
318-419
196-258
136-179
84-110
9
Passive opening
w/motorized damper
420-539
259-332
180-230
111-142
10
Passive opening
w/motorized damper
540-679
333-419
231-290
143-179
11
Powered makeup air
>679
>419
>290
>179
NA
Notes:
A. An equivalent length of 100 feet of round smooth metal duct is assumed. Subtract 40 feet for the exterior hood and ten feet for each 90- degree elbow to
determine the remaining length of straight duct allowable.
B. If flexible duct is used, increase the duct diameter by one inch. Flexible duct shall be stretched with minimal sags. Compressed duct shall not be accepted.
C. Barometric dampers are prohibited in passive makeup air openings when any atmospherically vented appliance is installed.
D. Powered makeup air shall be electrically interlocked with the largest exhaust system.
Combustion air
Not required per mechanical code (No atmospheric or power vented appliances)
v/ Passive (see IFGC Appendix E, Worksheet E-1) Size and type 3 inch ridged, 4 inch flex
Other, describe:
Explanation - If no atmospheric or power vented appliances are installed, check the appropriate box, not required. If a power vented
or atmospherically vented appliance installed, use IFGC Appendix E, Worksheet E-1 (see below). Please enter size and type. Combustion
air vent supplies must communicate with the appliance or appliances that require the combustion air.
Section F calculations follow on the next 2 pages.
Directions - The Minnesota Fuel Gas Code method to calculate to size of a required combustion air opening, is called the Known Air
Infiltration Rate Method. For new construction, 4b of step 4 is required to be filled out.
IFGC Appendix E, Worksheet E-1
Residential Combustion Air Calculation Method
(for Furnace, Boiler, and/or Water Heater in the Same Space)
Step 1: Complete vented combustion appliance information.
Furnace/Boiler: 8000
raft Hood Dan Assisted ✓ krect Vent Input: Btu/hr or Power Vent
Water Heater:40000
raft Hood a Fan Assisted Direct Vent Input: Btu/hr or Power Vent
Step 2: Calculate the volume of the Combustion Appliance Space (CAS) containing combustion appliances.
640
The CAS includes all spaces connected to one another by code compliant openings. CAS volume: ft3
LxWxH 10 L®W®H
Step 3: Determine Air Changes per Hour (ACH)1
Default ACH values have been incorporated into Table E-1 for use with Method 4b (KAIR Method). If the year of construction or ACH is not known, use
method 4a (Standard Method).
Step 4: Determine Required Volume for Combustion Air. (DO NOT COUNT DIRECT VENT APPLIANCES)
4a. Standard Method
Total Btu/hr input of all combustion appliances Input: Btu/hr
Use Standard Method column in Table E-1 to find Total Required TRV: ft3
Volume (TRV)
If CAS Volume (from Step 2) is greater than TRV then no outdoor openings are needed.
If CAS Volume (from Step 2) is less than TRV then go to STEP 5.
4b. Known Air Infiltration Rate (KAIR) Method (DO NOT COUNT DIRECT VENT APPLIANCES)
Total Btu/hr input of all fan -assisted and power vent appliances Input: 40000 Btu/hr
Use Fan -Assisted Appliances column in Table E-1 to find RVFA: 3000 ft,
Required Volume Fan Assisted (RVFA)
Total Btu/hr input of all Natural draft appliances Input: 0 Btu/hr
Use Natural draft Appliances column in Table E-1 to find RVNFA: 0 ft3
Required Volume Natural draft appliances (RVNDA)
Total Required Volume TRV = RVFA+ RVNDA TRV = 3000 _+0 __3000 TRV ft
Step 5: Calculate the ratio of available interior volume to the total required volume.
Ratio = CAS Volume (from Step 2) divided by TRV (from Step 4a or Step 4b)
Ratio =640 / 3000 = 0.21
Step 6: Calculate Reduction Factor (RF).
RF=1min us Ratio RF=1- 0.21 -0.79
Step 7: Calculate single outdoor opening as if all combustion air is from outside. 40000
Total Btu/hr input of all Combustion Appliances in the same CAS Input: Btu/hr
(EXCEPT DIRECT VENT)
Combustion Air Opening Area (CAOA): 1 3.33
Total Btu/hr di vid ed by 3000 Btu/hr per int CAOA = 40000 / 3000 Btu/hr per int= int
Step 8: Calculate Minimum CAOA.
Minimum CAOA = CAOA multiplied by RF Minimum CAOA = 13.33 x 0.79 = 10.49 int
Step 9: Calculate Combustion Air Opening Diameter (CAOD)
CAOD = 1.13 multiplied by the square root of Minimum CAOA CAOD = 1.13V Minimum CAOA = 4.12 in. diameter go up one inch in size
if using flex duct
1 If desired, ACH can be determined using ASHRAE calculation or blower door test. Follow procedures in Section
G304.
1. The 1994 date refers to dwellings constructed under the 1994 Minnesota Energy Code. The default KAIR used in this section of the table is
0.20 ACH.
This section of the table is to be used for dwellings constructed prior to 1994. The default KAIR used in this section of the table is 0.40 ACH.
Residential Combustion
IFGC Appendix E, Table E-1
air (Required Interior Volume Based
on Input Rating of Appliance)
Input Rating
(Btu/hr)
Standard Method
Known Air Infiltration Rate (KAIR)
Fan Assisted or Power Vent
1994 to present Pre -1994
Method (cu ft)
1994 to present
Natural Draft
Pre -1994
5,000
250
375
188
525
263
10,000
500
750
375
1,050
525
15,000
750
1 125
563
1,575
788
20,000
1,000
1 500
750
2,100
1,050
25,000
1,250
1 875
938
2 625
1,313
30,000
1 500
2 250
1 125
3,150
1 575
35,000
1,750
2 625
1 313
3 675
1 838
40,000
2,000
3 000
1,500
4,200
2 100
45,000
2,250
3,375
1 688
4,725
2 363
50,000
2,500
3 750
1 675
5 250
2 625
55,000
2 750
4 125
2,063
5,775
2,888
60,000
3,000
4 500
2 250
6 300
3 150
65,000
3,250
4 875
2,438
6,825
3 413
70,000
3,500
5 250
2 625
7 350
3 675
75,000
3,750
5t625
2,813
7t875
3 938
80,000
4 000
6 000
3,000
8 400
4,200
85,000
4 250
6t375
3 188
8t925
4 463
90,000
4,500
6 750
3 375
9 450
4 725
95,000
4,750
7J25
3 563
9 975
4 988
100,000
5 000
7 500
3 750
10,500
5 250
105,000
5 250
7t875
3 938
11,025
5,513
110,000
5,500
8 250
4,125
11,550
5,775
115,000
5,750
8.625
4,313
12 075
6,038
120,000
6 000
9 000
4 500
12,600
6 300
125,000
6 250
9 375
4 688
13,125
6 563
130,000
6 500
9,750
4 875
13,650
6 825
135,000
6 750
10,125
5,063
14 175
7,088
140,000
7,000
10,500
5 250
14 700
7 350
145,000
7 250
10,87S
5 438
15,22S
7 613
150,000
7 500
11,250
5 625
15,750
7 875
155,000
7 750
11,625
5 813
16,275
8 138
160,000
8 000
12,000
6 000
16,800
8 400
165,000
8,250
12,375
6,188
17 325
8,663
170,000
8,500
12,750
6 375
17 850
8 925
175,000
8 750
13,125
6,563
18,375
9 188
180,000
9 000
13,500
6 750
18,900
9,450
185,000
9 250
13,875
6 938
19,425
9 713
190,000
9 500
14,250
7 125
19,950
9 975
195,000
9,750
14,625
7,313
20 475
10,238
200,000
10,000
15,000
7 500
21 000
10 500
205,000
10,250
15,375
7 688
21,525
10 783
210,000
10,500
15,750
7 875
22,050
11,025
215,000
10,750
16,125
8 063
22,575
11 288
220,000
11,000
16,500
8,250
23,100
11,550
225,000
111,250
16 875
18,438
23,625
111,813
230 000
111,500
17 250
18,625
24,150
112,07S
1. The 1994 date refers to dwellings constructed under the 1994 Minnesota Energy Code. The default KAIR used in this section of the table is
0.20 ACH.
This section of the table is to be used for dwellings constructed prior to 1994. The default KAIR used in this section of the table is 0.40 ACH.