Have you checked with your local health department? There are local/state health codes that lay out lots of building/equipment specs. I don't know if your specific question will be one of them, but it's possible. It's also possible that an experienced health inspector will have an educated opinion.

 

Depending on your local codes... you may need to be permitted first by the state authorities or the county where you are doing the work.

Contact your Warm Air Contractors Licensing Board. They can provide you with the info you seek.

They will also require you to pass periodic installation inspections and show your exhaust and make up calculations along with your blueprints.

I hope this helps and good luck.

 

NFPA publishes construction and installation standards, I'll dig through my stuff and see if I can find a publication number.

 

also

Depending on your state you will need a construction supervisors and a stamped drawing if you are going to open up the roof or wall for access.

 

Not to mention... but, if the roof us under a contract/warranty... you will need to contact their roofer to inspect to maintain the warranty.


I guess we could go on and on...

 

grease duct

The owner hired an HVAC engineer who mapped out the specs that I have to Adhere to ie exact placement of hood and curb/exhaust fan. i was just trying to find info and/or tips on installing the welded grease duct from the hood to the fan. I understand some third party will pressurize it with steam to search for leaks. And I also believe I'm supposed to use 1/16th inch mild steel with gentle angles and inspection doors along with the expensive fire wrap This is new construction and the make-up air and exhaust air have been tightly calculated and I am working with the local inspectors. It's hard to find info on grease ducts installation. Any advice? thanks.

 

Educate

After you do get the info give us an up date.

Good luck,

 

The design of the duct/hood/fan/locations should already be designed by an engineering company or Architect. You shouldnt have to get into this detail. You just quoted install (I assume).

NFPA 96 adresses all the specifics of what needs to be done. Metal needs to be 16Ga welded and wrapped or Selkirk as you state. Typically welded and wrapped is cheapest option. Selkirk type systems get $$ fast as they are pre-engineered and require fabrication lead time. If the Selkirk is damaged on site you have to order and wait for a new one.

You can find information on wraps from Thermalceramics.com. Their product is called FireMaster FastWrap+.

International mechanical code accepts both wrapped and Selkirk-type ducts.

Good luck