Old line mechanicalHVAC contractor in St. Charles, MD
Old line mechanical is an HVAC contractor in St. Charles, MD. Open 7 days a week.
St. Charles, MD0 paid placements in any rankingHow we rank
Key facts
| Phone | (540) 272-3594 |
|---|---|
| Hours | Monday to Friday: 6 PM – midnight; Saturday and Sunday: 9 AM – 5 PM |
Trades
Each trade shows the evidence we matched it on.
- HVACmain tradeGoogle main category
Service area
Serves St. Charles and 4 towns within 25 miles: California, Lexington Park, Chesapeake Ranch Estates and La Plata.
Based in St. Charles, MDView on map
Opening hours
| Day | Hours |
|---|---|
| Monday | 6 PM – midnightevening |
| Tuesday | 6 PM – midnightevening |
| Wednesday | 6 PM – midnightevening |
| Thursday | 6 PM – midnightevening |
| Friday | 6 PM – midnightevening |
| Saturday | 9 AM – 5 PM |
| Sunday | 9 AM – 5 PM |
- Open evenings (after 6 PM)
- Open Saturdays
- Open Sundays
Typical heating and cooling prices
| Job | Low | Typical | High |
|---|---|---|---|
| AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range | $3,887 | $5,978 | $8,073 |
| Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range | $2,823 | $4,814 | $6,896 |
Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.
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Questions about Old line mechanical
What are Old line mechanical’s hours?
Old line mechanical is open 7 days a week. Its listed hours are Monday to Friday, 6 PM – midnight; Saturday and Sunday, 9 AM – 5 PM. On Saturdays it is open 9 AM to 5 PM, and on Sundays 9 AM to 5 PM. Hours come from the business listing; holiday hours may differ.
What areas does Old line mechanical serve?
Serves St. Charles and 4 towns within 25 miles: California, Lexington Park, Chesapeake Ranch Estates and La Plata. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.
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