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Hvac sales, service and installation for montgomery Co & p.G. Co, md

  • Shemtov Systems offers free estimates for system replacement. We will analyze your existing system, recommend a replacement that will best meet your needs and give you a price quote.
  • We will personally install your new system according to manufacturer’s instructions, local codes and provide you with a warranty on all parts and labor for up to two years.
  • 24 hour seven days a week phone service. We service most brands and models of residential and commercial systems.
  • Emergency service is available after hours and on weekends.


Based on the season and manpower, emergency and after hours service may be available between 5 pm and 8 am Monday through Friday, 12 pm and 8 am on Saturday, and all day Sunday.

  • We consider after hours services an extension of our normal work day beyond 5 pm. after hour service will be billed at 1.5 times our normal rate.
  • Emergency service, is a call that is initiates after we have completed the work day, or all day on Sundays and holidays. Emergency call will be billed at twice our normal rate.

SPRING pre-season air conditioning system checkup

  • Inspect overall operation of the air conditioning unit
  • Check air filters
  • Check condensate drain lines and flush as necessary
  • Check condensate pump for proper operation
  • Check refrigerant level
  • Check the condenser and evaporator coil
  • and clean as necessary
  • Check all electrical connections
  • Check contactors and capacitors
  • Check temperature difference across the evaporator coil


FALL pre-season heating
system checkup

  • Inspect the gas line
  • Inspect the chimney
  • Inspect the burners for proper flame
  • Inspect heat exchanger for signs of cracks
  • Inspect all limits and protection circuits for the furnace
  • Inspect the pilot, spark ignitor, or hot surface ignition operation
  • Inspect and clean air filters
  • Inspect airflow and adjust dampers
  • Inspect and tighten all high voltage connections
  • Inspect and tighten all low voltage connections
  • Inspect overall sequencing and operation of the furnace

Additional Inspections
for Heat

  • Check refrigerant level on heat pump
  • Check the defrost cycle
  • Check the condenser and evaporator coil
  • Check all electrical connections to the outdoor unit
  • Check all contactors and capacitors
  • Check temperature rise across
  • the evaporator coil
  • Check overall sequencing and operation of the heat pump

We Service

The following areas for HVAC, Heating
& Air Conditioning Services for both
Commercial & Residential

  • Bethesda
  • Chevy Chase
  • Gaithersburg
  • Germantown
  • Kemp Mill Maryland
  • Olney
  • Potomac
  • Rockville Maryland
  • Silver Spring
  • Wheaton MD
  • To the full list