Finding a reliable Furnace Repair contractor in Merrimack, NH is harder than it should be. FH HVAC makes the standard clear: written pricing, active NH licensing, live dispatch 24/7, and a 90-day parts and labor guarantee on every job.

The Furnace Repair contractor market in Merrimack, NH has a real accountability problem. Most homeowners have experienced it: verbal estimates, inconsistent technician quality, invoices that surprise them.
When you call FH HVAC in Merrimack, NH, you get a NH-licensed technician with NATE certification and EPA 608 credentials. Your quote is in writing before we start. Your guarantee is on your invoice. Call +1-844-586-3138 and a live dispatcher picks up — day or night, weekend or holiday.

Licensed, insured, and guaranteed. Every service below is available in Merrimack, NH right now.
System failure in Merrimack, NH doesn't wait for business hours. A live dispatcher at +1-844-586-3138 routes the nearest NH-licensed tech to your location and gives you an ETA before you hang up. Our trucks carry the parts most common in Merrimack, NH's HVAC systems, so first-visit repairs are the standard, not the exception.
Emergency line in Merrimack, NHFrom a full system replacement to a targeted repair in your Merrimack, NH home, our residential technicians don't guess system size. Every installation starts with a proper Manual J load calculation — the step that prevents the common mistake of oversizing, which causes short-cycling and early system failure. All NH permits pulled. Parts and labor both warranted.
Book a Merrimack, NH technicianCommercial HVAC failure in Merrimack, NH costs more than discomfort — it costs you customers, productivity, and sometimes compliance. Our commercial team handles rooftop units, large split systems, VRF and chiller work across Merrimack, NH — coordinated around your operating hours to minimize disruption. Priority response for commercial service agreement clients.
Merrimack, NH commercial pricingYour Merrimack, NH home's indoor air quality challenges depend on local seasonal patterns. FH HVAC installs and services HEPA filtration, UV germicidal systems, humidity control equipment, and ERVs matched to Merrimack, NH's specific climate demands. Most impactful for households managing asthma or recurring respiratory conditions.
Air quality service in Merrimack, NHHeat pump and ductless mini-split demand in Merrimack, NH has grown as homeowners understand the efficiency and versatility advantages. Factory training across all major brands means we handle the full job in Merrimack, NH, from installation through annual efficiency checks.
Ductless install: +1-844-586-3138The Merrimack, NH systems that run reliably for 20 years get maintained twice a year. The ones that fail early usually don't. Two tune-ups annually, priority dispatch year-round, 15% off parts and labor, refrigerant checks, coil cleaning, and a written condition report every visit.
Maintenance plan in Merrimack, NHFour steps. No surprises. That's the whole model.
A live dispatcher picks up in Merrimack, NH — day or night, no exceptions. Not a bot. Not a callback queue. A real person who starts routing a technician immediately.
We dispatch from a position close to Merrimack, NH — average on-site time under 60 minutes in most Merrimack, NH markets. Every credential verified before they arrive at your door.
You get the full cost in writing before anything begins in Merrimack, NH. Nothing starts until you've reviewed and approved it in writing. What you approve is what you pay.
90 days, parts and labor, on your invoice — not a verbal promise, a documented commitment.
These are the operating commitments behind every Merrimack, NH job. Verifiable. Documented.
What you approve is what you pay. Always. No post-job surprises in Merrimack, NH.
Every FH HVAC technician in Merrimack, NH carries an active NH contractor license. Ask for documentation before any contractor starts work on your system.
Regional technician positioning throughout Merrimack, NH keeps response times under 60 minutes in most markets — including during peak summer and winter demand.
The guarantee is on the invoice. 90 days, parts and labor. Not a handshake — a documented commitment.
Not voicemail. Not a bot. A live dispatcher who confirms your ETA before the call ends.
"Before I gave anyone access to my home in Merrimack, NH, I asked for documentation. FH HVAC was the only contractor who had it ready without hesitation."
— Verified customer, Merrimack, NH"I've dealt with three other HVAC contractors in Merrimack, NH in the past two years. Every one had some billing issue, some miscommunication, some problem. FH HVAC showed up fast, gave me a written quote, and billed me exactly that amount. This should be the standard."
"Our business in Merrimack, NH had an HVAC failure during a client event. I didn't think anyone would respond that fast on a Friday evening. FH HVAC had a commercial technician there in 50 minutes, diagnosed and fixed within two hours. Nothing we planned had to be cancelled."
"Two years on the maintenance plan in Merrimack, NH. At the spring tune-up this year they found a slow refrigerant leak in my evaporator coil. Caught and fixed at the maintenance pricing. That would have been an emergency call in August at double the cost."

FH HVAC covers all of Merrimack, NH with licensed technicians, written upfront pricing, and live 24/7 dispatch. One call. Real ETA. No runaround.
📞 +1-844-586-3138 — Furnace Repair in Merrimack, NH