HomeMy WebLinkAboutFinal (Bldg & HVAC) - 11/20/2002 0 INSPECTION SERVICES DIVISION CITY OF OSHKOSH
DEPARTMENT OF COMMUNITY DEVELOPMENT 215 CHURCH AVE
OSHKOSH Room 205 PO Box 1130
ON THE WATER CORRECTION NOTICE OSHKOSH WI 54903 -1130
Issue Date 11/20/02 Compliance Date 12/20/02 IMMEDIATELY Compliance No
Address 3040 WILDERNESS PL Inspected By Allyn Dannhoff 236 -5045
Name Address City State Zip Code
Sent to IA Owner JEFFREY S TREMBLY 3040 WILDERNESS PL OSHKOSH WI 54904 -6593
LA Contractor CR MEYER 895 W 20TH AVE OSHKOSH WI 54902 -0000
�f Other _ 0 -0000
HI Inspector
HI Required for Occupancy Occupancy Single Family Notice 0 First • Final 0 Other
Violations must be corrected and approved within 30 days unless otherwise noted. Call for reinspections prior to concealment
and /or occupancy. Upon completing the corrections, the owner /contractor /agent must sign and date at the bottom of this notice
and return it to the Inspection Services Division by the Compliance Date of 12/20/02
Introduction A final inspection on 11 -20 -02 revealed the following items to be corrected. A copy of the code section addressing item one
has been included for your review and to forward to the subcontractor.
Item # 1 Code COMM 23.02(3) Compliance No Compliance Date 12/20/2002 IMMEDIATELY
Description The mechanical exhaust system shall be balanced. Per subsection 4. a supply of intake air shall be provided equalling 40% of
the total air that would be exhausted if all bath fans and the kitchen hood (clothes dryer) were operating simultaneoulsy.This is
required to prevent backdrafting naturally vented appliances such as the gas and wood buming fireplaces.) I would suggest
consulting with an HVAC Designer to determine the best method to provide this make up air.
Item # 2 Code COMM 21.05(5) Compliance No Compliance Date 12/20/2002 IMMEDIATELY
Description The window adjacent (within 2') of the door in the 4 seasons room shall be safety glazed. Per our discussion on site, this will
apply to the double hung window, not the half round transom.
Summary
Please arrange a reinspection when these are completed. Please forward your design solution regarding Item 1 for review
prior to installation. The concem is supplying this air in a manner that will prevent creating a situation that would backdraft the
fireplaces (thus the suggestion to consult with a professional.)
DEFICIENCIES MUST CORRECTED AND APPROVED BEFORE CONCEALMENT. CALL (920) 236 -5050 FOR INSPECTION.
Signature Date (/ z'D C Z.
I hereby certify the violations listed on this report have been corrected in compliance with the applicable codes.
Print Name Company
Signature Date
Page 1 of 1
DEPARTMENT OF COMMERCE
Comm 23
Chapter Comm 23
HEATING, VENTILATING AND AIR CONDITIONING STANDARDS
Subchapter I — Scope .. ». „. » »„ .... »..1 Subchapter V — Chimneys and Vents .........» 41
Comm 23.01 Scope. 1 Comm 23.11 General requirements 41
Subchapter II — Design . » » »....... » „....... ». „ »...... 1 Comm 23.12 Masonry chimneys. 42
Comm 23.02 Design. 1 Comm 23.13 Factory-built chimneys or vents 42
Comm 23.14 Gas vents. 44
Subchapter III — Heating Equipment.. » »..... 4 Comm 23.15 Chimney connectors, smoke pipes
Comm 23.03 Selection of equipment 4 and stovepipes. 45
Comm 23.04 Types and location of equipment 5 Comm 23.155 Multiple appliance venting. 48
Comm 23.045 Solid -fuel- burning appliances.... 12 Comm 23.156 Condensate drains 48
Comm 23.05 Safety controls. 26
Comm 23.06 Combustion air. 27 Subchapter VI — Fuel Supply Systems 48
Comm 23.062 Mechanical draft systems. 33 Comm 23.16 Fuel storage. 48
Comm 23.065 Equipment maintenance Subchapter VII — Equipment Location and
information. 33 Operation • ..... 63
Subchapter IV — Delivery Systems .» ..33 Comm 23.17 Equipment location 63
Comm 23.07 Air distribution systems. 33 Comm 23.18 Operation. 63
Comm 23.08 Ductwork 34
Comm 23.09 Dampers, registers and grilles. 39
Comm 23.10 Piping. 40
Note: Chapter Ind 23 was renumbered to be chapter ILHR 23, Register, February, 1985, No. 350, eff. 3 -1-
85. Chapter ILHR 23 was renumbered Chapter Comm 23 under s. 13.93 (2m) (b) 1., Stats., and corrections made
under s. 13.93 (2m) (b) 7., Stats., Register, January, 1999, No. 517.
Subchapter I — Scope
Comm 23.01 Scope.
The provisions of this chapter shall apply to the design, installation and construction of all
heating, ventilating .air_conditioningaystems -in dwellings- covered by this code.
Subchapter II — Design
Comm 23.02 Design.
Every dwelling shall be equipped with a heating system designed in accordance with this
section. Heating equipment requirements may be waived for recreational dwellings used on,
during the non - heating season. Where a cooling system is provided, the cooling requirements of
this section shall be met.
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23.02
Recreational Dwellings
Question: Does a house need a heating system?
Answer: No. It would then be considered a recreational or seasonal dwelling as defined in
s. Comm 20.04(2). Compliance with Ch. 22, Energy Conservation, would not be
required if there is no heating system. However, an owner would be required to
retrofit the house to meet Ch. 22 standards before it could be heated and used for
year -round use in the future. Some foresight by the builder /owner would be
necessary if they contemplate it may be used year -round in the future.
(1) HEATING AND COOLING SYSTEM DESIGN. (a) Indoor and outdoor design
temperatures shall be selected from s. Comm 22.07.
(b) The heating and cooling systems shall be designed to maintain the indoor design
temperature at outdoor design conditions.
(c) When requested, room -by -room heat loss and heat gain calculations shall be
furnished.
(2) DISTRIBUTION SYSTEMS. Distribution systems shall be sized and located to
satisfy the heating and cooling loads of each conditioned space. When requested, a layout of the
distribution system shall be furnished to show that the system meets the requirements of this
code.
(3) VENTILATION. (a) General. All exhaust vents shall terminate outside the structure.
1. Mechanical ventilation systems shall be balanced.
Question: What does "balanced" mean in this section?
Answer: It means that the ventilation system should not produce excessive positive or
negative pressures in the dwelling.
2. Infiltration may not be considered as make -up air for balancing purposes.
3. All exhaust vents shall terminate outside the structure.
Exhaust Fan Termination
Question: Can an exhaust fan terminate inside a garage, crawlspace or attic near a vent?
Answer: No. It must have an exterior termination. The air currents may otherwise draw thr
exhaust back into the space.
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23.02
4. Intake air ducts shall be sized to provide a maximum of 40% of the total air that would
be exhausted with all exhaust ventilation in the dwelling acting simultaneously.
Question: What calculation method can be used to determine the make -up air needed for
exhaust fans?
Answer: The minimum amount of make -up air must be 40% of the total exhaust. Size the
duct considering the maximum flowrate conditions specified in s. Comm 23.07.
Comm 23.07 - TABLE (DUCT VELOCITIES) Per this table, the minimum duct velocity is
500 ft /min and maximum allowable is 800 ft /min.
Example: Determine size of make - up air duct required for these exhaust systems.
Range hood = 180 cfm (intermittent) x 40% = 72 cfm
Bath exhaust 1 = 50 cfm (intermittent) x 40% = 20 cfm
Bath exhaust 2 = 75 cfm (intermittent) x 40% = 30 cfm
TOTAL 305 cfin (intermittent) x 40% = 122 cfm
Based on the formula of Quantity = Velocity times Area (Q =VA). THEREFORE:...
A =Q /V, or A= 122/800, or A =.1525 sq. ft. x 144 = 21.96 sq. in. (Required)
Try 4" Round duct =3.14 x radius squared= 3.14x2x2 =12.56 sq. in. (Too small)
Try 6" Round duct =3.14 x radius squared= 3.14x3x3 =28.26 sq. in. (OK, since >21.96)
Not doing the calculation described above to appropriately size the air intake may result in an
oversize intake and cause the problems noted above. Note: System should be tested per 23.18 to
make sure the design amounts of air are actually provided when the system operates.
5. Kitchen range hoods that exhaust air from the kitchen area shall terminate outside the
structure and shall be considered as exhaust ventilation for balancing and makeup purposes.
6. Kitchen range hoods that are listed and installed to recirculate air without exhausting it
are not required to be balanced.
(b) 1. 'General.' Except as provided under subd. 2., mechanical ventilation systems shall
be balanced.
2. 'Exception.' Passive intake air ducts providing makeup air for intermittent exhaust fans
shall be sized to provide at least 40 percent of the total air that would be exhausted with all
intermittent exhaust ventilation in the dwelling operating simultaneously.
3. 'Kitchen range hoods.' a. Kitchen range hoods that exhaust air from the kitchen area
are considered as exhaust ventilation for balancing and makeup purposes.
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23.03
b. Kitchen range hoods that are listed and installed to recirculate air without exhausting it
are not required to be balanced.
4. 'Infiltration.' a. Infiltration may be considered as makeup air for balancing purposes
only where there are no naturally vented space- or water - heating appliances in the dwelling.
b. For the purpose of complying with this subdivision, naturally vented space- or water -
heating appliances are those that take combustion of dilution air from inside the dwelling,
including unsealed fireplaces and draft hood appliances with power venting.
Note: Whole -house fans that are used in the summer to bring cool night air in through open windows and
exhaust into the attic are considered to be a supplemental cooling system rather than part of the ventilation system.
Note: See s. Comm 22.14 for additional requirements on mechanical ventilation.
(c) Habitable rooms. Habitable rooms without openable windows shall be provided with
a balanced mechanical ventilation system producing one air change per hour of fresh outside air
while the room is occupied.
(d) Rooms with toilets, tubs or showers. Any room with a toilet, tub or shower shall be
provided with exhaust ventilation capable of exhausting 50 cubic feet per minute on an
intermittent basis or 20 cubic feet per minute on a continuous basis.
Note: The department will accept designs which meet the Air Conditioning Contractors of America
manual; the Mechanical Contractors Association manual; and the Sheet Metal and Air Conditioning Contractors
National Association standards for heating and air conditioning systems for one- and 2- family dwellings.
Ductless Recirculating Fans
Question: Are there any department- approved ductless recirculating bathroom fans that may
be used in lieu of natural ventilation or mechanical ventilation?
Answer: No. In rooms with a toilet, tub, or shower, it is required by (3)(d) that mechanical
exhaust fans, ducted to outside the dwelling, be installed even where openable
windows are present.
(4) CONTROLS. The temperature rise through the equipment shall not exceed 100° F
unless listed. Controls shall be provided to maintain the inside temperature. Where forced,
warm -air systems are used, controls shall be installed to control air movement.
Subchapter III — Heating Equipment
Comm 23.03 Selection of equipment.
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