Advice on drilling a hole for Cold Air Intake

[LobsterParty]

I made the decision to make my harman insert pellet stove have an outside air intake
And I need to drill a hole.
It needs to be 3 inches ?

Lots of choices and options. I have a relative with a rotary drill / hammer drill, Lots of 9 inch madonary drill bits.
I read online I might need a Core Drill Bit which costs $100

When I was a kid I drilled a hole through concrete with little drill bits and a chisel and hammer.

$100 for a special core bit isn't that bad but not sure if my uncles rotary drill is the correct style drill for a "core hole saw

I saw there is diamond, tungsten, carbide , Dry & Wet. It's overwhelming. I took some pics to help gather some advice from any construction people on here.

Thank you

I don't care if it's messy. As it will be concealed.
I assume I can drill some on inside and some on outside. And should start with 1 small pilot hole to find the location inside & outside etc.

Thank you for all and any advice.

 

[DAKSY]

Don’t waste your hard-earned cash on a core drill. Use a small masonry bit. Locate the position with a pilot hole, then use a Sharpie to outline the opening. Drill a series of holes inside the circle you’ve drawn, & then knock the center out with a hammer. Use a cold chisel to remove the rough edges. Install a short length of pvc pipe in the hole with a 90 degree elbow on the outer end, with the opening turned downward. Attach your flex to the inner section. Once your tubing is in place seal any gaps in the wall with 30-year silicone & attach a screen to the end of the elbow to keep any critters out.

 

[LobsterParty]

Don’t waste your hard-earned cash on a core drill. Use a small masonry bit. Locate the position with a pilot hole, then use a Sharpie to outline the opening. Drill a series of holes inside the circle you’ve drawn, & then knock the center out with a hammer. Use a cold chisel to remove the rough edges. Install a short length of pvc pipe in the hole with a 90 degree elbow on the outer end, with the opening turned downward. Attach your flex to the inner section. Once your tubing is in place seal any gaps in the wall with 30-year silicone & attach a screen to the end of the elbow to keep any critters out.

That was my backup plan. Then some guy on Craigslist said he would come drill the hole at lunch time today, so it was cheaper than the tool itself.
75 bucks well spent.
I was so close to paying the $350 for the OAK , until I realized I don't need the kit I can just make it happen

 

[Ssyko]

The kit is for ppl that don’t have the ability, time or tools to make one. Glad you got that drilled for 75 bucks thats cheep