Chart #1 Tracking Chart with TAC Action:  Accommodate Florida Specific Need

2018 International Residential Code – Mechanical – Mechanical TAC	
Mods requested to be pulled from consent agenda	

RCCIWG (# of mods 1) – 
(Mod was not pulled for individual consideration)

RM12-15

Total # of mods in chart = 2
Total # of un-pulled mods= 1

	

	

M2018 International Residential Code – Mechanical

Mechanical TAC 

IRC-Mechanical Code Change No.	IRC-Mechanical Section	Change Summary b/t 2015 IRC-M and 2018 IRC-M	Change Summary b/t 2017 FRC-M and 2018 IRC -M	Staff comments	
					
RM11-15
	M1502.3.1	Adds new section M1502.3.1 “Exhaust termination outlet and passageway size.” The allowable (calculated) length of the dryer exhaust duct is based on an open (non-restrictive) exhaust terminal. Some exhaust terminals increase resistance due to their inherent design characteristics (path and final opening size). This results in the dryer exhaust duct having to be reduced in length. However, there is no allowance for a reduction in length for a highly resistant vent cap. Short of requiring testing standards for every vent termination, the code must require a minimum open area of 12.5 sq. inches
which equates to a 4" round duct. The code is very sensitive and detailed as it relates to 90 degree elbows and their respective friction loss but does not prohibit or penalize for termination hoods that grossly create back pressure, reducing the efficiency of the dryer.

Cost Impact: Will increase the cost of construction. 
The cost of the vent terminal may be higher.

	Same as change between 2015 IRC and 2018 IRC		
RCCIWG – Comment

Impactful (Explain) 
No cost increase.

	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	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RM12-15
▲▲▲	M1502.4.2	Modifies Section M1502.4.2 “Duct installation.” The length of the duct and termination are based on friction loss for round duct, not oval duct. The length of the dryer exhaust duct would have to be reduced if the 4 inch duct was oval in shape. This proposal adds text to address this.  The code change was further modified by the Committee.  The modification deletes the specification in inches to allow all manufacturer's products to be installed in 2 x 6 walls and clearly states the requirement to have ample room for round ducts. Duct deformation impedes air flow.

Cost Impact: Will increase the cost of construction
There is an added cost for furring strips on a 2 x 4 wall.
	Same as change between 2015 IRC and 2018 IRC		
RCCIWG – Comment

x

Impactful (Explain) 
Definite increase between $150 - $1000 depending on length of wall and cost to install.

	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	
Commission	

    No Action Needed	

	

	

 Overlapping provisions