Colvin's Heating and Air Conditioning has been servicing the Excelsior Springs area for 24 years.. Air Conditioners,Furnaces,A-Coils,Heat Pumps,Thermostats,Humidifiers,Filters,and much more. Repair and trouble shooting Air Conditioners,Furnaces,A-Coils,Heat Pumps,Thermostats,Humidifiers,and Free Estimates for replacements.