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Drying Ovens

​​​A drying oven is a chamber heated by the combustion of fuel to dry a product.  Drying ovens produce emissions from the combustion of fuel, such as natural gas or propane.  Some drying ovens are used to dry products that were recently coated.  If the applied coatings contain VOCs then a separate permit would be required for the coating operations (see Coating Operations).

Who Needs a Permit?

  • A permit is required for all drying ovens with a rated heat input capacity of 1 million BTU per hour or greater or that are not fired exclusively on purchased quality natural gas, liquid petroleum gas, or any combination thereof.

  • Each drying oven will be permitted individually if rated at 1 million BTU per hour or greater.  

  • A permit is required if the aggregate rated heat input capacity of all drying ovens used in the same process is 1 million BTU per hour or greater.

Permit Fees 

New Installations: 

  • Use Schedule 2 (see Rule 301, Section 308.3).  Fees are based on the design fuel consumption.   Use the Initial Permit Fee column for new installations or equipment not previously permitted.


  • For modifications of permitted equipment resulting in an increase in oven rating, the fee is assessed in accordance with fee schedule 2 (see Rule 301, Section 308.3) based on the incremental increase in BTU/hr resulting from such change.

  • For modifications resulting in no increase in rating, the fee shall be based on Rule 301, Section 306.2.

Equipment Installed Without an Authority to Construct: 

As per Section 302.1 of Rule 301, any person installing/operating regulated equipment without obtaining a permit from the Sac Metro Air District will be required to pay permit renewal back fees for each year of unpermitted operation, to a maximum of 3 years, in addition to the initial permit fee. 

Permit Application Completeness Determination

An application will not be accepted for processing until it is deemed complete. The following will be required in order for the Sac Metro Air District to make a completeness determination.

  • Completed application Forms  G100, G101, DO100, and HRA100 with the original signature of the owner/proprietor or responsible officer of the company.

  • The applicable permit fee in accordance with Rule 301.

  • Any additional information that may be requested in order to perform a health risk assessment or to better understand the process or the applicability of regulations.

 Documents / Forms



Application Instructions - DO100 Instructions - DO100.pdfApplication Instructions - DO100Application Instructions
DO100 - Drying Ovens - Drying OvensPermit Application Forms
G100 - General Application Form - General Application FormPermit Application Forms
G101 - General Information - General InformationPermit Application Forms
HRA100 - Health Risk Assessment Form - Health Risk Assessment FormPermit Application Forms

Related Rules

Rule Date Last Amended
Permitting Page
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