Im pretty sureyour mistaken about the size of your system. If the contractor said there isnt a larger size unless you to commercial then you would have a 5 ton. Check the model number of the condenser unit outside it should read 060 somewhere near the end of the model number. That would mean 60,000 BTU or five tons. If you have a 2 ton unit it would read 024 in the same location. Janitrol is not top of the line in any case. As a matter of fact it is one of the lowest cost units out there. But installed properly will give you years of service. Call another company to give you a second look. The service call may be worth your peace of mind.