Trusted HVAC & Water Heater Services in North Dartmouth | M & D 23 1/2 Hour

North Dartmouth, MA 02747

(508) 991-6982

Business Background

For over 30 years, M & D 23 1/2 Hour Oil & Gas Heating Services has been the trusted local heating and HVAC contractor for North Dartmouth, MA. Our commitment is built on reliability and genuine customer care, which is why we’re available for the community nearly 24 hours a day, 365 days a year. Whether you're a homeowner or a business owner, we understand that heating is essential. Our team brings decades of hands-on experience to every job, from installing new HVAC systems and water heaters to performing precise repairs and maintenance. We focus on providing straightforward, dependable service to keep your property comfortable through every New England season. Contact us today to speak directly with a member of our team.

Common Questions

How does M & D handle common local heating issues like radiator imbalance or boiler pressure problems?

We frequently address radiator heating imbalances and boiler pressure issues in North Dartmouth homes. For radiators, we perform a system-wide balancing to ensure even heat distribution, often starting with bleeding radiators and adjusting valves. For boiler pressure, our technicians diagnose the cause—whether it's a faulty pressure relief valve, a leak, or an expansion vessel issue—and make the precise repair to restore safe, efficient operation, preventing future callbacks.

What is included in your HVAC system maintenance service?

Our HVAC maintenance is a thorough inspection and cleaning designed to improve efficiency and prevent breakdowns. It includes checking and cleaning system components, inspecting electrical connections, testing safety controls, lubricating moving parts, and checking refrigerant levels (for AC). This proactive service helps extend the life of your system, maintain manufacturer warranties, and can lower your energy bills, which is especially valuable during our cold Massachusetts winters.

Why should I consider a professional for water heater installation instead of a DIY approach?

Professional installation by our experienced team ensures your water heater is correctly sized for your household's needs, properly vented (for gas models), and connected to code-compliant plumbing and electrical systems. Incorrect DIY installation can lead to safety hazards like gas leaks or water damage, inefficient operation, and voided manufacturer warranties. With over 30 years in the business, we handle the entire process safely and efficiently, providing you with reliable hot water and peace of mind.

Provided Services

  • HVAC system repair
  • Water heater installation
  • HVAC installation or replacement
  • HVAC system maintenance
  • Water heater repair

Business Location & Hours



Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:12:00 AM - 12:00 AM (Next day)


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