HVAC services in Olney, Maryland
Shemtov Systems covers Olney, Maryland from a branch at 16501 Batchellors Forest Rd, Olney, MD 20832, which currently trades as Olney Heating and Air Conditioning under the same family ownership as the Silver Spring office. Shemtov Systems has been a family-owned, NATE-certified HVAC contractor since 1981, licensed and insured in Maryland and Washington DC, working on air conditioners, furnaces, heat pumps, boilers, and ductless systems. Call the Olney branch at 240-286-6590, or the main office at 240-355-3333, where Shemtov Systems advertises a 24-hour answering service.
Key takeaways
- Olney work is covered from a branch at 16501 Batchellors Forest Rd, Olney, MD 20832, on 240-286-6590, with the Silver Spring office on 240-355-3333.
- About 77 percent of Olney's 12,060 housing units were built between 1970 and 1999, so most equipment here is on its second or third replacement and still tied to original ductwork.
- About 61 percent of occupied Olney homes heat with utility gas and about 31 percent with electricity, which is why heat pumps and dual fuel pairings come up so often here.
- Montgomery County DPS takes Olney mechanical permit applications electronically, and because Olney is unincorporated no municipal permit sits on top of the county one.
Does Shemtov Systems serve Olney from a local address?
Yes. Alongside the Silver Spring office at 604 Ridgewell Way, there is a branch at 16501 Batchellors Forest Rd, Olney, MD 20832, currently trading as Olney Heating and Air Conditioning under the same family ownership, on 240-286-6590. Batchellors Forest Road is the only through road in what the 2005 Olney Master Plan calls the Southeast Quadrant: a two-lane road with 90-degree turns, narrow pavement, and constrained right-of-way that was designated an Interim Rustic Road in 1996. You can also reach us through the contact page.
Which Olney neighborhoods do you cover?
We cover the 20832 core and the communities around it. The Greater Olney Civic Association, the umbrella group for the Master Plan area, lists members including Olney Mill, Hallowell, Lake Hallowell, Norbeck Meadows, Norbeck Grove, Norbeck Hills, Cherrywood, Tanterra, Oatland Farm, Manor Oaks, Highlands of Olney, Olney Acres, Olney Oaks, Olney Square, The Reserve at Fair Hill and The Villages at James Creek, with Christie Estates, James Creek and Gold Mine Crossing out in far northeast Olney. Olney is unincorporated, so there is no town line to argue over.
Why do Olney colonials and townhomes fail the same way?
Census figures put Olney at 12,060 housing units, about 67 percent single-family detached and 28 percent townhouse, with roughly 77 percent built between 1970 and 1999. Only 380 units predate 1960. That means colonials and townhomes on their second or third system, on ducts 30 to 50 years old. Sagging flex duct in unconditioned attics, undersized returns, and crimped trunk lines in finished basements are the usual culprits. A repair that keeps coming back is often a duct problem wearing out the equipment. See our duct design, testing, and zoning services.
How does heating fuel change the replacement decision in Olney?
Olney's occupied homes run about 61 percent on utility gas, 31 percent on electricity, 5 percent on fuel oil or kerosene, and 2 percent on bottled or tank propane. The census electricity category does not separate heat pumps from electric resistance heat, so that share covers both. Washington Gas is the gas utility for Montgomery County; Pepco supplies most of the county and Potomac Edison parts of it, so we confirm the utility on the account before any rebate paperwork. Compare a furnace against a heat pump in Maryland.
Who issues the permit for an Olney changeout?
Yes. Montgomery County's Department of Permitting Services requires a mechanical permit to erect, install, enlarge, alter, repair, remove, convert or replace a mechanical heating, ventilating and air-conditioning system, and applications must be filed electronically. Because Olney is unincorporated with no municipal government, there is no town permit on top of the county one, unlike an incorporated municipality such as Gaithersburg, which runs its own mechanical permit process. See what HVAC replacement costs in Maryland.
How should a new system be sized for an Olney home?
Montgomery County is in climate zone 4A, the mixed-humid zone. RESNET Appendix A, the table behind Maryland home energy ratings, lists Montgomery County at 94 F for the 1 percent cooling condition and 12 F for the 99 percent heating condition; the ENERGY STAR county guide gives 92 F and 14 F. Either published pair beats the old nameplate tonnage as a Manual J input. The two-story detached colonials common in Olney carry more exposed wall and window area per conditioned square foot than a ranch, and an upper floor that gains heat faster. Oversized equipment short-cycles and leaves humidity behind. Read how air conditioner sizing works.
Are heat pumps and ductless systems a good fit in Olney?
Often, yes. A cold-climate heat pump still makes useful heat at a zone 4A design temperature, but capacity falls as the outdoor temperature drops, so the design has to cover the gap below the balance point with electric backup heat or, in a dual fuel pairing, a gas furnace that takes over in a cold snap. Ductless suits the spaces with no ducts: converted attics and basements in 1970s and 1980s colonials, bonus rooms over garages, sunrooms, and rural-fringe houses never fully ducted. See our ductless mini-split systems and heat pump installation and repair.
What maintenance does an Olney system need?
Two visits a year, spring and fall, and a heat pump needs both because it runs in all four seasons. Olney's wooded lots put outdoor units close to leaf litter, grass clippings, and heavy spring pollen, so keep about two feet clear around the condenser and check filters monthly. On the well and septic properties along the rural edge of the Master Plan area, keep irrigation spray and piled mulch off the pad. A seasonal service agreement bundles both visits; our air conditioning service and furnace repair and replacement pages explain what each covers.
Frequently asked questions
Which phone number should Olney customers call?
Call 240-286-6590 for the Olney branch at 16501 Batchellors Forest Rd, or 240-355-3333 for the main Shemtov Systems office in Silver Spring. Both are the same family-owned company, and Shemtov Systems advertises a 24-hour answering service on its main line.
Do you pull the Montgomery County mechanical permit?
Yes. Montgomery County DPS requires a mechanical permit to install, convert, or replace HVAC equipment, and applications are filed electronically. Gas equipment brings WSSC out alongside DPS; an all-electric heat pump is signed off by DPS alone. Maryland also requires the work to be performed under a state HVACR license.
Are rebates available for a new heat pump in Olney?
Possibly. Maryland's EmPOWER program funds utility energy efficiency incentives, and Pepco and Washington Gas Light Company are both participating utilities. House Bill 864, enacted in 2024, requires utilities to add incentives for switching from fossil fuel heating and appliances to efficient electric alternatives. Programs move, so we check what is actually live against your equipment before quoting.
What refrigerant will a new system in Olney use?
Not R-410A. Under EPA's Technology Transitions rule, new residential and light commercial air conditioners and heat pumps have had to use a refrigerant below a 700 GWP limit since January 1, 2025, which in practice means R-454B or R-32. R-410A is still available for servicing equipment already in the field, so a working system does not need replacing because of the rule.
Talk to Shemtov Systems
For AC repair, furnace and heat pump work, a replacement quote, a ductless assessment or seasonal maintenance in Olney, call the branch on 240-286-6590 or the Silver Spring office on 240-355-3333. Same family behind both numbers.
Services we provide
Family-owned since 1981. Call 240-355-3333.
Other areas we serve
Shemtov Systems covers Montgomery County and the Washington DC metro.