2018 International Mechanical Code - Mechanical TAC

IMC Code Change No.	IMC Section 	Change Summary b/t 2015 IMC and 2018 IMC	Change Summary b/t 2017 FMC and 2018 IMC	Staff comments	
		Chapter 2 Definitions			
M24-15	403.3.1.1, Table 403.3.1.1	Changes text of Table 403.3.1.1 “MINIMUM VENTILATION RATES.” This proposal is to update the existing ventilation rate table in the IMC. Standard 62.1 is the source material for this table, and this updates the table to match the ventilation rates in 62.1-2013.

Cost Impact: Will increase the cost of construction. the cost of construction may increase in refrigerated warehouses/freezers, and warehouses as there will now need to be mechanical ventilation in those spaces
	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

X

 

     a.  b.  c.      d.  e.  f. 

VOTE: 7 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

x

 

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions     	

	

	

	

	
M26-15	403.3.2.4	Adds new section 403.3.2.4 “Ventilating Equipment”. And adds new standard ANSI/AMCA 210-ANSI/ASHRAE 51-07.  Exhaust equipment shall be listed and labeled to provide min required air flow.

Cost Impact: Will increase the cost of construction
Over 12,000 ventilating equipment products are labeled and listed in the HVI directory. For these products, there will be no incremental cost associated with this change. For equipment that is not currently tested, listed, and labeled, the incremental costs are highly dependent upon volume of the specific products sold.
	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

X

 

     a.  b.  c.      d.  e.  f. 

VOTE: 7 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

x

 

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions     	

	

	

	

	
M42-15	504.8.2	Modifies text of 504.8.2 “Duct installation.” Changes to cavity size language to allow installation of the ducts without deformation.  The code change was further modified by the Committee.  The modification eliminates an exact
dimension.

Cost Impact: Will increase the cost of construction. There is an added cost of adding furring strips to a 2 x 4 wall.	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

X

X

 

     a.  b.  c.      d.  e.  f. 

VOTE: 7 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

x

 

x

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions     	

	

	

	

	
M51-15	202, 506.5.2	Adds new definition “POLLUTION CONTROL UNIT (PCU)” and adds new Section 506.5.2 “Pollution Control Units.” Concerning smoke, grease, and other particulate at the exhaust outlets commercial cooking appliances.  The code change was further modified by the Committee.  The modification removes any ambiguity about whether these units are required to be installed.

Cost Impact: Will increase the cost of construction
The cost of construction of these specific units may be increased by manufacturers if their current unit did not meet the minimum requirements per this new section.
	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

X

 

X

     a.  b.  c.      d.  e.  f. 

VOTE: 6 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

x

 

x

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions     	

	

	

	

	
M104-15	916.1, CHAPTER 15	Modifies Section 916.1 “General.” Seeks to add new standards “AHRI 1160 (I-P) -09 Performance rating of Heat Pump Pool Heaters,” “ANSI Z21.56a/CSA 4.7 -2013 Gas Fired Pool Heaters,” “CSA C22.2 No. 236-11 Cooling Equipment
CSA C22.2 No. 218.1-M89(R2011) Spas, Hot Tubs and Associated Equipment”, “UL 1563-2009 Standard for Electric Spas, Hot Tubs and Associated Equipment-with revisions through July 2012.”  To ensure consistency with what standards are required for the various pool heaters in Section 316.2 and Table 316.2 of the International Swimming Pool & Spa Code.   The code change was further modified by the Committee.  The modification deletes AHRI 1160
which is already referenced in the IECC. Gas heaters are covered by the IFGC and the new exception recognizes integral heaters in spas listed to UL1563.

Cost Impact: Will not increase the cost of construction
This proposal will not increase the cost of construction and ensures the applicable standards for the various pool heaters are provided within all the I-codes that address pool heaters.

	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

X

 

     a.  b.  c.      d.  e.  f. 

VOTE: 7 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

x

 

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions     	

	

	

	

	
M124-15	1105.6.3	Modifies Section 1105.6.3 “Ventilation Rate.” Added modification. “The minimum required emergency ventilation rate…” Clarifies that the 30 air change per hour ventilation rate for ammonia is the emergency ventilation rate.

Cost Impact: Will not increase the cost of construction

The proposal is a clarification of the current requirements and will not affect the cost of construction.
	Same as change between 2015 IMC and 2018 IMC		
     TAC Action

X

     Accommodate Florida Specific Need:
     YES (Select Criteria)                                                     NO: 

 

X

     a.  b.  c.      d.  e.  f. 

VOTE: 7 YES – 0 NO

     Others (Explain):	Commission Action

x

Accommodate Florida Specific Need:

YES (Select Criteria)                                                               NO: 

 

x

a.  b.  c.      d.  e.  f. 
Others (Explain):	
    	
TAC	
Cmsn.	

       No Action Needed 	

	

	

  Overlapping provisions