am i getting myself into hot water by installing a new gas furnace on my own? i am a homeowner, and although not licensed, i am relatively well-versed in plumbing, electrical, carpentry, and mechanics. i've run gas line and installed water heaters before and the installation seems easy enough. 80% 70k btu horizontal furnace in a well-vented crawlspace. i am not replacing any of the ductwork, only updating the exhaust venting to code. are there any major issues of which i should be aware? as long as i meet code, am i going to get in to trouble if i ever sell the house? i am planning on having a commercial home inspector or professional hvac man review my work when i am done.
by the way, in no way do i mean to denigrate the skills and abilities of all you hvac professionals out there. i know there is a reason you are liscensed, insured, and paid good money for your work. i just don't have the $2000 that guys in my area charge for furnace installation and product markup, and i think my situation is straightforward enough that i might be able to pull it off myself.
thanks for the advice!