FREE chicken coop plan (nice one too) on the Purina Mills Website - Page 18

I built this a while back.  I did not put the clear panel on top as I was concerned about the hail we get here sometimes.  I put the nest box on the front and centered it.  I moved the door to the side.  I also put tin on the top of the nest box lid.  I also put tin on the chicken door to avoid the dogs or racoons from chewing in.  I thought about dropping the back down as some have  done, but thought that it might be messy or get in the way for cleaning out the inside.  It might not.  I was concerned about ventilation as it is very hot here in the summer and fall, so I built a frame and covered it with hardware cloth and mounted it to the inside under the back with hinges so that when I raise the lid the chicks cannot jump out. The frame opens up to the right.  I did not put a latch on it, but took a log narrow piece of metal with holes in it and screwed it to the hardware cloth frame and bent it where it goes around the corner and drilled a hole in the 2by.  I took a thick round piece of metal and bent it into an l shape.  I then insert the pin into the hole to keep anything from opening the frame. I put a 6 inch board across the back inside and screwed it in behind the hardware cloth frame to keep the shavings from falling out.  I put an eye screw in the middle of the back of the roof frame and and eye bolt down near the bottom of the back and ran a cord from the eye screw through the eye bolt and put a hook on the end.  I can then hook it up high on the fence to get it out of the way to clean or  hook it lower on the fence to allow for ventilation and let it have a slope if it rains while up.  For a poop pan.  I took the side off an old free standing range.  Just a couple of screws on each side to remove.  It has a lip on it.  I turned it with the lip up and then put two pieces of 2x4's on their side and joined them together.  I then drilled holes in the range side and screwed it to the 2 bys.  I put a piece of wood across the front and back of the 2bys to keep the shavings out from under it.  It fits perfectly under the roost and is coated like enamel ware so it should not rust as easy and be easy to clean as well. 

I built this a while back.  I did not put the clear panel on top as I was concerned about the hail we get here sometimes.  I put the nest box on the front and centered it.  I moved the door to the side.  I also put tin on the top of the nest box lid.  I also put tin on the chicken door to avoid the dogs or racoons from chewing in.  I thought about dropping the back down as some have  done, but thought that it might be messy or get in the way for cleaning out the inside.  It might not.  I was concerned about ventilation as it is very hot here in the summer and fall, so I built a frame and covered it with hardware cloth and mounted it to the inside under the back with hinges so that when I raise the lid the chicks cannot jump out. The frame opens up to the right.  I did not put a latch on it, but took a log narrow piece of metal with holes in it and screwed it to the hardware cloth frame and bent it where it goes around the corner and drilled a hole in the 2by.  I took a thick round piece of metal and bent it into an l shape.  I then insert the pin into the hole to keep anything from opening the frame. I put a 6 inch board across the back inside and screwed it in behind the hardware cloth frame to keep the shavings from falling out.  I put an eye screw in the middle of the back of the roof frame and and eye bolt down near the bottom of the back and ran a cord from the eye screw through the eye bolt and put a hook on the end.  I can then hook it up high on the fence to get it out of the way to clean or  hook it lower on the fence to allow for ventilation and let it have a slope if it rains while up.  For a poop pan.  I took the side off an old free standing range.  Just a couple of screws on each side to remove.  It has a lip on it.  I turned it with the lip up and then put two pieces of 2x4's on their side and joined them together.  I then drilled holes in the range side and screwed it to the 2 bys.  I put a piece of wood across the front and back of the 2bys to keep the shavings out from under it.  It fits perfectly under the roost and is coated like enamel ware so it should not rust as easy and be easy to clean as well. 

Do you have an pictures of the ventilation frame you made? Summers get very hot here in central Arizona as well and I was thinking of replacing one of my side doors with a hardware cloth door for lots of airflow for summer. I did plant grape vines on the west side of the coop fence so they will get a little more shade than last summer but I'm not sure if it will be enough.