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englewood1 10-06-2007 06:42 PM

Masonary wall penetration
I have a Goodman furnace I installed, now I need to penetrate the masonry structure for the exhaust vent. I have never heard of a 2 1/8" hole saw that will penetrate masonry. Does such a tool exist?

redline 10-06-2007 10:12 PM

Is the whole building masonary?

englewood1 10-07-2007 04:34 AM

Yes, it is brick and masonry and the AC ( air conditioning copper tubes) lines penetrate close to where I have to run the exhaust. The water heater and furnace used to share a common 6" flue to the roof, but you can't tie a forced blower to a natural convection connection, if only I didn't have a gas water heater.

rjordan392 10-07-2007 05:05 AM

There may be a tool for that size hole. I once had a contractor drill a 4 inch diameter by 6 inch hole through solid concrete. Check with tool rental companys. When I had it done years ago, the contractor charged $60.00 and it was cheaper then renting the tool. I believe you have to rent both the drill motor and the special diamond bit.
I justed check my tool rental book and what you need is called a core drill. This tool can cut holes from 1/2 to 10 inches. There's a company called United Rentals in my area that has it. Go to for one near you. Or check the yelow pages for "concrete cutting and core drilling" for a contractor.

englewood1 10-10-2007 09:28 AM

Condensate is milky white color!
I fired it up for 10 to 15 minutes for measurements and the condensate was a milky color coming out of the condensing furnace, is this normal? This was the first start up!

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