Make sure your flue is accessible: laws call for this being obvious and available so faults (loose joints, cracks) might be detected.
Boilers are possibly sealed-combustion or non-sealed combustion units. You should https://katrinaykuj836670.webdesign96.com/29011472/how-much-you-need-to-expect-you-ll-pay-for-a-good-lennox-furnace