outside air exchange needed with hydronic?

[dbuck50]

I have a hydronic/boiler baseboard heating system in my house. I have no a/c or furnace. My cousin says I need to have some sort of air exchange with outside air, or I will have sick house syndrome. The house is 6 years old and pretty tight. I though air exchange was only needed for furnace systems. My boiler has a powervent which pulls the combustion air from the outside, but there is no formal air exchange system. Is this needed?

[afickk]

if it takes combustion air from the house the combustion air needs to be replaced somehow.

[gmcd]

Most building codes require a minimum air change rate in any house with any kind of heating system, usually in the range of 0.35 to 0.5 ACH depending on your location and climate. That being said- where is the make-up air for the bathroom exhaust, laundry dryer exhaust, range hood exhaust coming from? If the house is tight, you have to make sure that make-up air is coming from "somewhere", and not just raw, cold outdoor air leaking in through opening windows and cracks in the walls.