We have a 20 year old Lochinar water heater. We just discovered that we have to replace our furnace & the tech said we should go ahead & replace the water heater as well because of how it is vented (with an accordian plastic tube), because there have been problems with that type of venting & it should be changed for safety (in case the tube cracks or gets a leak). There is nothing wrong with the heater & if we have to spend an un-planned $4000+ on a furnace, don't really want to add another $1200 to that if we can get around it.
Is there different venting we could use for the water heater that is safer? Since we are in Michigan & a winter storm is coming tomorrow, we need to act on this quickly.