RESIDENTIAL VENTILATION DESIGN FORM (FOR SYSTEMS SERVING A SINGLE DWELLING UNIT ONLY)

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1 While care has been taken to ensure that the information contained within this document conforms to the Uniform Building and Accessibility Standards Act (UBAS) Act and the National Building Code of Canada (NBC), Tweidt Building Code Enforcement Services does not assume responsibility for errors or omissions in this document, nor for the specifications or work based on it. Your design professional is to ensure conformance with Part 9 of the NBC. Background The UBAS Act and the NBC indicate that mechanical ventilation systems serving not more than one dwelling may be constructed in accordance with Section 9.32 of the NBC. Ventilation systems that serve more than one dwelling unit must be designed in accordance with Part 6 of the NBC. Section 9.32 of the NBC indicates that an owner and/or ventilation contractor may choose to design and build the ventilation system under CAN/CSA-F326-M, Residential Mechanical Ventilation Systems; or, under the prescriptive requirements of Subsection , Heating Season (Mechanical) Ventilation, of the NBC. The owner and/or ventilation contractor is responsible for the proper installation of the design chosen and to ensure that the system is properly installed and balanced. Design Methods 1.) System Design under the CAN/CSA-F326-M Standard This standard allows for flexibility in the design. A ventilation system conforming to this standard is to be designed and installed by a person experienced with the requirements of CAN/CSA-F326-M or certified by HRAI. The use of this option will require a calculation sheet to be completed prior to the permit being issued. This calculation sheet must include the required air flows, the method of meeting the CAN/CSA-F326-M standard by specifying continuous and/or intermittent exhaust flows and the calculation of temperature of the air delivered to the heat exchanger based on an outside temperature of -35ºC. When the project is completed, tests must be conducted by an HRAI certified installer and the results submitted on a form similar to the provided in the CAN/CSA-F326-M standard. 2.) System Design under Subsection of the NBC The use of this option will require that a calculation sheet be completed prior to the permit being issued. This calculation sheet specifies the equipment that will be installed to meet the NBC prescriptive requirements. Upon completion, a certificate of installation and operation will be required to be submitted by the ventilation contractor. It is the owner s responsibility to ensure that it is submitted. **A calculation sheet has been provided within this document to aid the building owner and/or ventilation contractor in complying with Subsection of the NBC.** Page 1 of 7

2 Calculation Sheet for design under NBC Subsection Building Civic Address Legal Description of Project Location City / Town / R.M. Building Owner Name Building Owner Phone Number Ventilation Contractor Name Ventilation Contractor Phone Number Section A _ Total Ventilation Capacity (TVC) Ventilation Capacity Table of NBC Total Ventilation Capacity Calculation Capacity No. of Room [L/s] Capacity x Rooms = Subtotal Master Bedroom 10 5 L/s x = Other Bedrooms 5 10 L/s x = Living Room 5 Total Ventilation Capacity = Dining Room 5 Family Room 5 Recreation Room 5 Notes: Unfinished Bsmt At least one bedroom is to be designated as the Master Bedroom. Line 1 Other Habitable Rooms 5 Kitchen 5 Water Closet Room 5 Laundry 5 Utility Room 5 - Be sure to plan for future development (i.e. basement room development). - Combined Living / Dining or Family / Dining spaces are to be determined as if each were individual rooms. Page 2 of 7

3 Section B1 Principal Exhaust Capacity (PEC) Fan No. Location of Fan Principal Exhaust Capacity Calculation Sound Duct Size Duct Type Capacity [L/s] Total Principal Exhaust Capacity = Line 2 Maximum PEC Permitted Type of Fan Maximum Sound = Line 1 x 75% Sone dba Principal Exhaust Line 3 Minimum PEC Permitted = Line 1 x 50% Line 4 Kitchen Bathroom or Water Closet Room Supply Notes: - If the Total Principal Exhaust Capacity in Line 2 is greater than the Maximum PEC Permitted in Line 3 then a variable flow control is required to adjust the Total Principal Exhaust Capacity to + / - 10% of the Minimum PEC Permitted in Line 4; OR, a damper would have to be installed in the duct to control the Total Principal Exhaust Capacity in Line 2 down to the Maximum PEC Permitted in Line 3. - At no time is the Total Principal Exhaust Capacity in Line 2 to be less than the Minimum PEC Permitted in Line 4. Page 3 of 7

4 Section B2 Principal Supply Air Capacity (PSAC) Principal Supply Air Capacity Details Duct No. Duct Size Duct Type Capacity [L/s] Supply Fan 1 Yes / No 2 Yes / No 3 Yes / No 4 Yes / No Line 5 (Not to be less than Total Principal Supply Capacity = Line 4) Sound Maximum Sound Type of Fan Notes: Sone dba - If no supply fan is provided for the supply air duct then Principal Exhaust Sound details are not required. Kitchen Bathroom or Water Closet Room Supply - When a supply fan(s) is provided, the supply fan(s) capacity must match the exhaust capacity determined in Section B1. Page 4 of 7

5 Section C Supplemental Exhaust Capacity (SEC) Supplemental Exhaust Capacity Calculation Duc t Fan No. Location of Fan Sound Size Duct Type Total Supplemental Exhaust Capacity = Capaci ty [L/s] Li ne 6 Notes: - Each Bathroom or Kitchen not exhausted with the principal exhaust requires supplemental exhaust: Kitchens = 50 L/s Bathrooms = 25 L/s - Where the principal exhaust serves the Kitchen and Bathrooms, an additional Supplemental exhaust fan is required in the Kitchen. - All supplemental exhaust fans or appliances that exhaust more than 75 L/s require make-up air. Type of Fan Principal Exhaust Kitchen Bathroom or Water Closet Supply Maximum Sound db Sone A Page 5 of 7

6 Section D Ventilation System Balance Principal Exhaust Capacity from Section B1 plus Supplemental Exhaust Capacity from Section C must be greater than or equal to Total Ventilation Capacity from Section A. Please check to ensure that this requirement is met prior to the submission of this calculation sheet. Section E Other Requirements under Subsection The building owner and/or ventilation contractor is responsible to ensure that duct sizes and types specified above have been selected in accordance with prescriptive requirements of Article (Principal Exhaust), Article (Supply Air), Article (Main Trunk and Branch Ducts) and Article (Supplemental Exhaust). - The building owner and/or ventilation contractor is responsible to ensure that all other NBC requirements of Subsection are met. Some of which include: Combustion air is required to vented combustion appliances as per SaskEnergy regulations. Air intakes are required to be located a minimum 900mm from exhausts or as may be required by SaskPower for gas vents. Air intakes must have a hood with a minimum area equal to the duct area it serves, a corrosion resistant screen with a mesh size of 6 mm (1/4 inch), and be a minimum of 450 mm (18 inches) above the final grade. Air intakes are to be labelled as such. A CO sensor with an audible alarm is required adjacent to a solid fuel burning appliance without air tight doors. The outdoor air duct, if connected to the return air plenum of the furnace, must be connected a minimum of 3 m upstream of the furnace unless air is supplied through an acceptable mixing device. The connection must be downstream of all return air branch connections. The principal exhaust fan must be interlocked with the furnace motor where the outdoor air duct is coupled to the return air plenum of the furnace. Exhaust ducts discharging to the outdoors must be at least 100 mm (4 inches) above the final grade protected from the weather and be equipped with a backdraft damper at the wall. Page 6 of 7

7 Certification for the Installation of the Ventilation System required under Section 9.32 of the NBC This form will be required upon completion of the installation and must be submitted to TBCES It is the owner s responsibility to ensure that this form is submitted in order to obtain confirmation of compliance. Building Civic Address Legal Description of Project Location City / Town / R.M. Building Owner Name Building Owner Phone Number Ventilation Contractor Name Ventilation Contractor Phone Number HRAI # (if applicable) Building Permit Number This is to certify that the ventilation system installed in the above noted dwelling has been installed in accordance with the proposal submitted under the Building Permit. (PRINT EXCEPT FOR SIGNATURE) Contractor Name & Company Name Signature Date Page 7 of 7