When I worked in the business there were several names that had good review. My info is several years outdated but here is a recommendation FWIW: Tacoma, Thermal Imaging, R-Pro, J-Radcliffe.
https://www.aepohio.com/global/utilities/lib/docs/save/residential/programs/aepohio/In-homeEnergySavings/AEP-Participating-Contractors-GreaterColumbus_10-14-2015.pdf