I would not use an air source heat pump in Potomac Md also you will probably need more than 1 unit for 18000 sq ft of living space.
no it will not work at all
Call the contractor and have it fixed. Were they install correctly. Are all the vents leaking or just one? Were they sealed? A properly installed vent shouldn't leak even if it has not been sealed. The bottom edge may be under the shingle instead of on top of it. You should shingle to a point and then put the vent on and shingle on top of the nailing flange from one third to one half of the sides of the vent depending on where it comes on the rows.
what are the answers to the shingle applicators manual tenth edition
Shingle urchin was created in 1758.
Shingles are a lot like floors. The patterns change every few years as well as the colors. When a shingle is installed on a roof it will definitely fade with time. It is best to save some shingle packages from the initial installation to replace any shingles for roof patching in the future. The sun and the heat from the surface of the roof bake a shingle. The oils will eventually bake out and the shingle becomes brittle. If you were to break a corner off a shingle and it is pliable it is still doing well. If it breaks easily than you will find little stones in your rain gutters showing its deterioration. This will than break apart in wind storms.
Shingle is a woman's haircut that is close cropped.
Refer to Fastest Shingle Roofer answer
We were looking at shingle samples for our new roof.
Hanging out your own shingle is starting your own business.
Operation Shingle happened on 1944-01-22.
You have water getting under the shingle somewhere.
shingle: toast shimmy: jelly squeeze: orange juice