Further, air has to flow across the fins to pull the heat out.

It's an easy fix, not expensive, add will value to your home because it will help in heating/air costs.

Aside from the hideous amount of paperwork you will incur (city, state, and federal tax, license, reporting, and certificate requirements), it will take Herculean efforts to make them operate like fully functional businesses enough to prevent courts from "piercing the corporate veil" if ever sued.

I am currently in need of a new furnace and air conditioning unit on my primary residence and wondered if anyone had recommendations for a company to have this quoted and installed by in the Columbus OH area.

Don't let making a living prevent you from making a life." ~ John Wooden

"If you have built castles in the air, your work need not be lost; that is where they should be.

I have heard that you should put no more than 2 wires in each hole to prevent arching. 

They slap some new paint and steam clean the carpet and put it on the market where I'll use higher grade paint that is professionally painted ( at a good price) and put down laminate/hardwoods and upgrade or replace the central/heat air. 

The smell just seems to be saturating the air and is not eminating from any one specific place. 

The issues in my company's case were too few circuits (4), 60A service with fuse box, no ground, no insulation (walls, floors, or ceiling), no central air (had oil heat though;), ... so 'rehab' had serious limitations unless the electrical was upgraded.