Reliable HVAC Installation and Expert Climate Control in Merrimack, NH

Is your comfort disrupted by a broken HVAC, high energy bills, or uneven temperatures? Count on A&C Mechanical for quick, professional solutions. We handle heat pump installations, central air, HVAC projects, and gas piping to restore comfort quickly.

“The service, the product, and the overall experience were outstanding. The team was friendly, knowledgeable, and efficient. T...”

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Edina Pjanic
Master Gas FittersSamsung DealerfullylicensedEPA-logo

Why Merrimack Chooses A&C Mechanical for Heating and Cooling

You can rest assured, with 25 years of experience and a foundation built on veteran‑owned values, we provide the honest service many homeowners and business owners struggle to find. We don't just install equipment; we perform a site evaluation to ensure your new system is the right fit for your square footage and home's layout.

Veteran Owned Integrity

You receive honest, disciplined service from a family‑owned team that treats your property with the highest respect.

Master Gas Fitters

You can trust our technical knowledge for safe electrical connections and precise gas piping for all your appliances.

Satisfaction Guaranteed Performance

You get a reliable HVAC system backed by our commitment to quality workmanship and local building codes.

Proven Excellence in HVAC Installation and Service!

Licensed technicians are installing a new HVAC system with precise electrical work and refrigerant lines.

Premium HVAC System Installation for Lasting Comfort

Is your old system making unusual noises or causing your energy bills to skyrocket? Many homeowners face the stress of system failures during peak New Hampshire winters or humid summers. A&C Mechanical solves these common problems by providing a thorough evaluation of your current cooling system and existing ductwork. We guide you through the HVAC installation process to ensure you get the correct size and right type of HVAC unit for your specific needs.

Lower Energy Costs

We install systems that operate efficiently to reduce your monthly utility expenses.

Precise Temperature Control

Enjoy consistent temperatures in every room without the frustration of air leaks.

Improved Air Quality

Our new installations help manage humidity levels and prevent mold growth in your home.

Maximized Rebates

We help you identify utility rebates to lower your total labor and investment costs.

HVAC Maintenance by a professional.

Preventative HVAC Maintenance for Optimal Performance

Avoid emergency service calls by scheduling a thorough inspection of your air conditioning and heating equipment. Our HVAC technician will check refrigerant leaks, clean the evaporator coil, and ensure your system is running efficiently. Regular maintenance is a critical step to extend the life of your HVAC unit and maintain your home's energy efficiency over the long run.

Emergency Repair for a mini split.

24/7 Emergency Repair When Your System Fails

When you face system failures or refrigerant leaks in the middle of the night, our licensed technicians are ready to help. We provide rapid response for all HVAC systems, fixing electrical issues and unusual noises to restore your climate control immediately. We follow strict safety protocols to ensure your family remains safe while we get your heating and cooling back online.

Hot Water Heaters services.

Professional Hot Water Heater Installation and Repair

From traditional furnaces to modern water heating solutions, we ensure you have reliable hot water year‑round. We evaluate your home's layout to determine the right fit for your needs, ensuring all electrical connections and gas piping meet local building codes for long‑term safety.

Gas Piping & Appliances services.

Expert Gas Piping and Appliance Hookups

As Master Gas Fitters, we bring technical expertise to ensure your gas lines are installed correctly. Whether you are adding new installations or updating existing ductwork, we handle the complex electrical and piping work required for the safe, efficient operation of all your gas‑powered equipment.

Patio Heaters & Fireplace Inserts services.

Enhanced Outdoor and Indoor Comfort Solutions

Elevate your lifestyle with professional installation of patio heaters and fireplace inserts. We provide a site evaluation to ensure proper sizing and clear access for all venting. Our quality workmanship ensures these additions integrate seamlessly with your home while providing greater comfort throughout the New Hampshire seasons.

Our Proven Step-by-step Installation Process

The Initial Service Call and Consultation

Your journey begins when you reach out for a free consultation. We discuss your current common problems, such as uneven temperatures or unusual noises, and schedule a time for a professional site evaluation at your location.

Thorough Evaluation and Proper Sizing

A licensed technician visits your property to perform a thorough evaluation. We don't just swap boxes; we calculate the square footage and inspect existing ductwork to ensure proper sizing.

Custom Solution and Honest Estimate

Based on our findings, we provide a detailed proposal featuring HVAC systems with high SEER ratings. We explain the technical knowledge behind our recommendations, whether it’s a heat pump, central air, or a ductless mini-split.

Professional Installation and Safety Protocols

Once the work begins, our certified technicians handle everything from electrical connections to refrigerant lines with quality workmanship. We strictly adhere to local building codes and safety protocols.

High view of HVAC system.

Preferred Club Membership

Receive exclusive benefits throughout the year as a Preferred Club member. Join our affordable HVAC preventative maintenance program to save money, maintain your systems, and enjoy less worry!

When you have your boiler, furnace, heat pump, or air conditioner regularly maintained and cared for by a professional, you can help it last up to twice as long.

Our highly‑trained technicians are available to serve you 24/7.

15% OFF EMERGENCY SERVICES AND PRIORITY SCHEDULING

Yearly Inspection

We’ll professionally clean and rejuvenate your entire system to peak efficiency! We will schedule a thorough inspection of your heating and cooling systems and perform adjustments and regular maintenance as needed, ensuring your systems are all up to date.

Preferred Service

As a member of the Preferred Club, you'll receive preferred service! Enjoy skip‑the‑line privileges with appointment scheduling.

Discounts on Repairs and Equipment

With the regular maintenance the Preferred Club provides, your HVAC system is less likely to break down. But if it does, you’ll get special Preferred Club prices up to 25% lower than non‑Preferred Club members. You'll also enjoy big discounts on new HVAC equipment.

The A&C Mechanical Satisfaction Guarantee

With 25 years of experience, our family‑owned and veteran‑owned team stands behind every HVAC installation with a satisfaction guarantee. If your new HVAC system fails to meet promised system performance, we will work tirelessly to make it right. Fully licensed and insured, we strictly follow local building codes and safety protocols to ensure quality workmanship and total peace of mind for every customer.

Reviews

Real Feedback From Our Residential and Commercial Clients!

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Arthur and Corey did a great job replacing our furnace. Very professional and knowledgeable!

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Mari Vega

Arthur and Corey did a great job replacing our furnace. Very professional and knowledgeable!

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Mari Vega

Arthur and Corey did a great job replacing our furnace. Very professional and knowledgeable!

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Mari Vega

Veteran owned

Thank You for Your Service

As a veteran-owned business, we want to show our appreciation for those who serve our country and our community. We are proud to offer a 10% discount to all active military personnel, veterans, and first responders, including firefighters, police officers, and EMS workers. This discount is valid for up to $100 off all professional services and up to $300 off new installations.

Must have ID verification on site during the visit to show the technician.
Only valid for personal home.
Does not include annual maintenance services or installation.
HVAC installation being done.

Ready to Experience Reliable Climate Control in Merrimack?

Don't let an old system or wasting energy drain your bank account. Whether you need a ductless mini, a new heat pump, or emergency repairs, A&C Mechanical is here to help. Our team is ready to provide a free estimate and a thorough evaluation of your heating and cooling needs. Contact us today to see why many homeowners trust us for their new HVAC system installation and year-round comfort.