Flue slope. Question-I've seen this type of venting 3-4 times a month in older houses and never had anyone complain. The bottom metal flue is the 80% furnace with an uphill rise from it to the newly lined masonry chimney (stainless steel liner).
Monarch butterflies utilize different habitat in the warm months versus the cold months. In the spring, summer and early fall, they can be found wherever there are milkweeds. Monarchs lay their eggs on milkweeds and they're always searching for them in fields, meadows and parks.
Butterflies need a shady place for shelter from the hot sun, and the Royal Butterfly House is the perfect answer. Place a small twig inside the butterfly house to give the butterflies a place to perch while getting some shelter from the hot summertime sun.