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Does anyone know what heater adapter I can buy to connect cat3 single wall 4" pipe to my Heater? I purchased the Nova Vent 4" CAT3 pipe but there adapter requires 1.75" of pipe insertion and there is only 3/4" pipe sticking out (pic attached). I found an adapter made by Sterling called a GG...

Showkey, what are the metal bands that are sticking out and does the bigger end with the orange seal go towards heater? There is not alot of pipe sticking out to attach to.thanks

Good morning, Does anyone have a picture or a brand and model number for the correct adapter that connects the 4" Horizontal CAT3 Vent Piping to the heater? I am having a hard time figuring out what I need and Mr HEATER tech support was no help. I am using the ZFLEX Nova Vent CAT3 Stainless...

Folks, any answers on this? I want to order my piping today and trying to make sure I do it right. Manual says 5 foot minimum piping on horizontal venting but someone mentioned it's 5 foot maximum on horizontal venting. The manual States 5 foot minimum of few different times so is the manual...

Thanks. I was told by Mr heater tech support that a thermostat with a microprocessor will affect heater control board.

I am coming out the side of garage and terminating with a T that has a screen on each side. So the minimum pipe length is 5 feet correct? I have seen a few people say 5 feet was the max length and that is not what the manual shows

Dave67fd, I attached pics from the installation manual and circled the sections that state horizontal piping must be a minimum of 5 feet and it says maximum horizontal pipe length is 25 feet with 1 elbow. Is this info not correct? Thanks for the help

What about where the manual States you must use an isolation transformer on thermostats with microprocessors or it could affect heater control board. I wanted to use the honeywell RTH8580WF thermostat so I can turn heater on remotely. Thanks for the help

Hey. The manual States a thermostat with a microprocessor has to use an isolated transformer or it will cause issues with heater control board. The thermostat still connects directly to the heater. The wifi part is from thermostat to my router. I wanted to use the honeywell RTH8550WF thermostat...

The Mr heater manual States in 3 locations the horizontal pipe has to be minimum 5 feet. So is this not correct in all 3 places in manual?

Hello. I am trying to understand a couple things before installing my MHUNG80 heater. Does the horizontal piping have to be a minimum of 5 feet long? I got an email back from their tech support that said the piping does not have to be a minimum of 5 feet but it states that in the manual 3...

How do you install the isolation transformer? If you isolate the 24v from the R terminal on the heater and then connect the W terminal from thermostat to the W on heater the 24V from heater R terminal will not be the connection to the heater W terminal since its isolated. Thanks Beware of the...

Hello. I just purchased a Mr Heater Big Max 80K BTU Garage Heater and will be using Propane. My question is what type of termination cap is allowed for the CAT3 type venting. The manual only shows a T Pipe that is open on both ends. Are there other type termination caps I can use that are safe...