Services
Full-service HVAC in Silver Spring, MD: heating, cooling, duct systems, generators, and boilers. Shemtov Systems handles installation, repair, and maintenance.
Service
High Quality HVAC solutions for homes and businesses
Shemtov Systems groups its work into families, each with its own page: heating, air conditioning, duct systems, home comfort, water heaters, generators, plumbing, electric and light commercial. The office is in Olney and the working area is Montgomery County. This page explains what separates those families, what a county job takes on paper, and how a fault is found. To skip ahead, call 240-355-3333.
Key takeaways
- Heating and cooling are listed separately because most homes here run two systems.
- Replacing a furnace, air conditioner or heat pump in Montgomery County takes a mechanical permit first.
- Gas equipment draws a WSSC Water inspection on top of the county one; an all electric heat pump does not.
- Duct and airflow work solves comfort complaints that new equipment on its own will not touch.
How are the services on this site organized?
Heating covers furnaces, heat pumps, boilers and central heating service. Air conditioning covers residential systems, central air service and ductless mini splits. Duct systems and home comfort deal with the air after the equipment has done its part, from thermostats to humidifiers. Water heaters, generators, plumbing and electric round out the list.
Which permits and inspections does a Montgomery County job need?
The county requires a mechanical permit before a furnace, heat pump, air conditioner or boiler under 350,000 Btu is installed, replaced or removed. Applications are electronic, and the Department of Permitting Services issues a one for one replacement immediately, or generally within three business days when plans need review. Gas equipment is then inspected twice, by the county and by WSSC Water. An all electric heat pump takes only the county inspection.
When does repairing stop making sense?
The county draws a useful line: swapping a compressor or a burner inside an existing unit needs no permit; replacing the unit does. Weigh three things against a replacement quote: whether the part is under warranty, whether the fault is in the sealed refrigerant circuit or the heat exchanger, and what an older refrigerant charge costs now. Compare signs your furnace or AC needs repair with how long furnaces and air conditioners last.
What can duct work fix that new equipment cannot?
Many comfort complaints are airflow problems in disguise: a bedroom that never cools, or a system that runs long and still misses the setpoint. New equipment does not fix undersized returns, open joints in an unconditioned attic, or a layout never drawn for the rooms it feeds. Duct pressure testing puts a number on what escapes, duct design and installation corrects the layout, and zoning lets areas call for air separately.
Which areas does Shemtov Systems cover?
The office is in Olney, and the working area is Montgomery County: Wheaton, Takoma Park, Bethesda, Rockville, Gaithersburg, Olney and the towns between them. Give the address when you book.
What actually happens on a service visit?
A diagnosis is measurement, not guesswork. On a cooling call that means the temperature drop across the indoor coil, refrigerant pressures read against outdoor conditions, static pressure across the blower, and the condensate path. On a heating call it means combustion readings, flame sensing, the heat exchanger and the venting. Those numbers separate a failing part from a system choking on restricted airflow, and they come first.
Talk to Shemtov Systems
Not sure which page fits your problem? Call Shemtov Systems at 240-355-3333 and someone will point you to the right service.
Frequently asked questions
What is the difference between a repair call, a tune-up and a replacement estimate?
Three different visits. A repair call is diagnostic: the technician measures, finds the fault and prices the fix. A tune-up inspects equipment that still works. A replacement estimate surveys the house and the system, and it is free.
Do you work on systems you did not install?
Yes. Repairs and replacements on existing equipment are as much of the work as new installations, across most residential and commercial brands, not only the lines sold here.
Is a service agreement worth having?
It helps if the seasonal visits would otherwise slip. A service agreement schedules them and builds a record of the same system over years, which is what makes a slow drift visible. See how often HVAC systems need service.