Anyone know any good AC contractors in the central Massachusetts/Worcester area?

Let me know! 

It's all run under the table currently and haven't had any problems, but want to formalize this as a business to avoid any hardship down the road.I don't know how I should be protecting myself here.

If you don't have any leads or don't know where to start here are a couple suggestions: ask brokers who people use for debt, find a mortgage broker as they have access to different buckets of capital, use a website like CoStar to look at closed transaction over the last 12 months and see who they used for debt.

I run a call center for Real Estate and its all about knowing your numbers (100 dials to talk to 10 people to get 1 solid lead to convert in 6-12 months).

Not dramatically but still.It's hard to tell anything without knowing what do you have there.

It's the I want to know everything before I do anything syndrome. 

Get to know them, buy them coffee and spend time with them.

Let me know if I can help. 

The lock is connected to a Samsung SmartThings hub via Z-Wave.I know that many here don't have to deal with such low temps in the winter, but ya never know!