On Tuesday, February 17, 2015 at 12:53:12 PM UTC-5, Tony Hwang wrote:
trader_4 wrote:
On Tuesday, February 17, 2015 at 11:05:14 AM UTC-5, Tony Hwang wrote:
Ed Pawlowski wrote:
On 2/17/2015 1:13 AM, Tony Hwang wrote:

Hi,
Mod mid-efficiency furnace haad fresh air insulated dampered intake duct
for combustion. In this case intake can be inside the basement. Our
local code allows this.

CAN BE does not mean SHOULD BE.

Using outside air for combustion is more efficient. You are using air
that you paid to heat and sending it up the flue. Sounds to me the
contractor for the OP is just lazy.
Hi,
Any how, today's new houses are so air tight we have to bring in
controlled outside fresh air into the house.

Maybe so, somewhere. But I've yet to see a new house that was so airtight
that it needed it around here, NJ.

Hi,
In cold climate up here every new house going up has provision for fresh
air intake. My house was built in 1994 per R2000 specs. If
it doesn't bring in fresh air, it may cause indoor CO problem.
Summer or winter, we seldom open windows.

Where is this CO problem supposed to come from?