The building is about 1500 sq. ft. 750 is our office space and the rest is warehouse for surplus materials.

They essentially pump heat from the outside to the inside, and can pull heat even at low temperatures.  

When they serviced it in May, there was no leak.Spoke to the tenant about raising the temperature being set to 72 all day, she said they feel 72 is not that low, and they have lived in places where they set it to 68 or lower and no issue. 

They deliver the materials when I request and I essentially use them as my materials warehouse with delivery. 

Amazon currently has a 1 million sq ft warehouse in the north end of Fall River and south coast rail connecting to Boston is scheduled to arrive within the next few year.  

For example, in my area one of those shopping warehouse clubs is now displacing a self-storage facility; in that shopping area there exist a Lowes and a Target and a movie theater multiplex, so the people are flocking to this shopping center, and the self-storage facility can now be displaced for bigger revenues from the shopping warehouse club that is now moving in.

it is a warehouse with an existing tenant.

For example, if Amazon was opening a warehouse in your town and you expect a large influx of people.

These are old single pane aluminum casement windows from the 60s, so it's not unreasonable to have a significant temperature differential with outside.

The national chain (renters warehouse) charges 10% for all repairs/maintenance work done on top of their monthly fee.