CERTIFICATE OF COMPLIANCE MECH-1C-ALT-HVAC
Prescriptive HVAC Alterations (Page 1 of 2)
Project Name/Address: Date:
2008 Nonresidential Compliance Form Rev-1 Jan 2012
Enforcement Agency: Permit Number: Climate Zone
NOTE: This form may be used only for single zone constant volume systems. This form shall not be used for newly constructed
buildings, additions, or VAV multi-zone systems.
Select one "Existing Building Project Type" and complete the corresponding steps listed in the "Complete Steps" column
below. Note: After installation of HVAC units and/or ducts, the Installation and the applicable Acceptance Forms are required to be
submitted for verification by the field inspector and a copy shall be made available to building owner.
Existing Building Project Type (select one): Complete Steps:
New or Replacement HVAC unit 1, 2, 3, 4, 5 and 6 (If criteria is met), 7 ( When economizer is installed)
New or Replacement ducts 1, 2, 3, 4, 5 and 6 (If criteria is met)
New Space Conditioning System (HVAC and ducts)
1, 2, 3, 4, 5 and 6 (If criteria is met)
, 7 (When economizer is installed), 8 (DCV)
Step 1 – Ducts and HVAC Equipment
Equipment Type, Efficiency
and Capacity
1
Floor Area
Served
2
Distribution Type
and Location
3
Duct Insulation
R-Value
4
Thermostat
Type
5
Configuration
(Central, Split, Package)
1. Indicate Equipment Type; Air Handler, Condenser, Heat Pump, Evap. Cooling, Boiler, Electric Resistance, etc. & HVAC Capacity; or Ducts
(new or replaced).
2. If the Floor Area Served (per duct system) exceeds 5,000 square feet, skip Steps 5 and 6.
3. Indicate Type and Location (Ducts on roof, ducts in conditioned space, ducts in attic, etc.)
4. Newly installed or replaced duct insulation: R-8 in unconditioned space or in buried concrete slab; R-4.2 in indirectly conditioned space; and R-0
for conditioned space.
5. Existing non-setback thermostats shall be replaced with setback thermostats for all altered units, and all newly installed space conditioning
systems requiring a thermostat shall be equipped with a setback thermostat. Setback thermostats shall meet the requirements of Section 112(c).
Step 2 – Mechanical Ventilation Calculations
Both options (Area and Occupancy Basis) shall be completed to determine the minimum mechanical ventilation rates and Column I must be the
greater of either Column E or H.
AREA BASIS OCCUPANCY BASIS
A B C D E F G H I
Zone/
System
Type of Use Condition
Area (ft²)
CFM
1
Per ft²
Min
CFM
2
C x D
Num of
People
2
CFM
per
Person
Min
CFM
3
F x G
Design Vent. CFM
Larger of
E or H
15
15
15
AREA BASIS
1. Minimum ventilation rate (CFM/ ft²) for the Type of Use in the Table below.
2. The conditioned floor area of the space multiplied by the applicable minimum ventilation rate from Table 4-1 CFM/ft
2
Column below.
For additional ventilation rates, see Table 4-3 and use the values listed in the Required Ventilation Column in the Nonresidential
Compliance Manual. This provides dilution for the building-borne contaminants like off-gassing of paints and carpets.
OCCUPANCY BASIS
2. For spaces with fixed seating such as a theater or auditorium, the expected number of occupants is the number of fixed seats.
3. The expected number of occupants or people multiplied by 15 cfm per person.
Type of Use CFM per ft²
Type of Use CFM per ft²
Auto repair workshops 1.50 High-rise residential
Ventilation Rates
Specified by the CBC
Barber shops 0.40 Hotel guest rooms (less than 500 ft²) 30 cfm/guest room
Bars, cocktail lounges, and
casinos
0.20 Hotel guest rooms (500 ft² or greater) 0.15
Beauty shops 0.40 Retail stores 0.20
Coin-operated dry cleaning 0.30 All Others
1
0.15
Commercial dry cleaning 0.45
1. For additional ventilation rates, see Table 4-3 in the Nonresidential Compliance Manual
