Manchester, NH

HVAC & Plumbing Service FAQs

HVAC & Plumbing Services We Offer in Manchester

GSMS Specialists handle the full range of home comfort needs for Manchester homeowners, from emergency repairs to full system replacements. Here’s what we cover:

Furnace Repair & Installation

A furnace that won’t fire on a January morning isn’t something that can wait. Our furnace repair and installation Specialists service gas, oil, and electric furnaces throughout Manchester, and we’ll always explain what’s actually wrong before we recommend a repair or a replacement.

• Same-day and emergency furnace repair, available year-round
• Full furnace replacement when a system is too old or inefficient to keep repairing
• Furnace and heating maintenance to catch small issues before they become emergencies

Boiler Installation & Repair

Boilers are common throughout Manchester’s older housing stock, and we know how to keep them running. We install and repair Energy Kinetics System 2000 boilers and most other major brands, whether the issue is a cold radiator or a unit that won’t fire at all.

• Boiler installation and replacement
• Boiler repair and diagnostic service for gas, oil, and propane systems
• Annual boiler maintenance and tune-ups

Cooling

When a Manchester summer hits, you need a system that keeps up. We offer:

• AC repair for every major brand, from refrigerant leaks to a compressor that won’t kick on
• AC installation and replacement sized correctly to your home, not guessed at
• Heat pump installation and repair — efficient heating and cooling from one system

Ductless Mini Split Installation & Repair

Older Manchester homes, additions, and converted spaces often don’t have existing ductwork — a mini split solves that without the cost of adding ducts. We offer:

• Mitsubishi ductless mini split installation for both heating and cooling
• Single-zone and multi-zone system design based on your home’s layout
• Mini split repair and maintenance for systems we installed or inherited from another company

Water Heater Repair & Installation

Running out of hot water mid-shower, or finding a puddle by the tank, usually means it’s time for a repair or a replacement. We provide water heater repair and installation throughout Manchester for both tankless and traditional systems.

• Water heater repair for leaking tanks, no hot water, or inconsistent temperatures
• Rinnai tankless water heater installation and service
• Heat pump water heater installation for homeowners looking for the most energy-efficient way to heat water
• Gas, electric, and propane systems, sized to your household’s actual hot water usage

Kitchen & Bathroom Plumbing

A dripping faucet, a slow drain, or a toilet that won’t stop running are the kind of small annoyances that turn into real damage if they sit too long. Our kitchen and bathroom plumbing Specialists handle the fixtures Manchester homeowners deal with most often.

• Kitchen plumbing — sink, disposal, dishwasher line, and faucet repair and installation
• Bathroom fixture repair and installation — toilets, faucets, and showerheads
• Drain clearing for slow or clogged kitchen and bathroom drains
• Fixture upgrades during a kitchen or bathroom remodel

Emergency Plumbing Repair

A burst pipe or major leak doesn’t care what time it is, and neither do we. Our emergency plumbing service covers:

• Burst or frozen pipe repair — a real risk during Manchester’s coldest months
• Active leaks, including pipes behind walls or under slabs
• Sewer and drain backups that need immediate attention
• Same-day response for plumbing emergencies throughout the Manchester area

Water Filtration & Water Quality

Many Manchester-area homes rely on private wells, which can mean hard water, sediment, or odor issues that municipal water doesn’t deal with. We design water filtration systems around what’s actually in your water, not a one-size-fits-all package.

• Reverse osmosis systems for cleaner, better-tasting drinking water
• Water softener installation for homes dealing with hard water and scale buildup
• Water sediment filtration for well water with grit, rust, or particulate
• Water quality testing to find out exactly what’s in your water before recommending a system

Indoor Air Quality

Your HVAC system can do more than heat and cool. We start with an Air Advice assessment, then design a system around what your home actually needs:

• A 20-minute Air Advice assessment measuring VOCs, allergens, humidity, and CO₂ levels
• Whole-home humidifiers and dehumidifiers
• High-efficiency filtration, including the Lennox PureAir system
• Energy recovery ventilators (ERVs) and in-duct UV air purifiers

Membership & Maintenance

The GSMS Home Club is built for homeowners who’d rather not think about their HVAC and plumbing until it’s time for a tune-up:

• Seasonal maintenance visits for your HVAC and plumbing systems
• Priority scheduling when something goes wrong
• Discounted rates on repairs
• Deluxe and Premier tiers, depending on how much coverage you want

A Family-Owned Manchester Company You Can Trust

GSMS was founded in 1987 by Mark Downing and has been family-owned and operated in New Hampshire for nearly four decades. Today the company is led by his sons, Zak and Jack Downing, who grew up in the business and bring that same neighbor-first approach to every job. We’re proud to have won the 2026 BBB Torch Award for Ethics — a recognition of the way we do business, not just the work we do.

Our We ❤ Local program reflects that same commitment, supporting Manchester-area schools, food drives, and community organizations throughout the year.

Manchester homeowners trust GSMS because:

• We’re licensed, insured, and locally based — not a national franchise
• Every Specialist is background-checked, trained, and dispatched from our Manchester shop
• We back every job with the Great Service Promise
• We’re a Lennox Premier Dealer, one of the highest certifications a Manchester HVAC company can earn
• 4.98-star average rating across hundreds of verified local reviews

Manchester’s Local Lennox Premier Dealer

GSMS is proud to be a Lennox Premier Dealer serving Manchester and the surrounding area — an elite status Lennox only awards to dealers who meet the highest standards for training, performance, and customer satisfaction. When a Manchester homeowner needs a new furnace, AC system, heat pump, or indoor air quality equipment, our Lennox certification means you’re getting a Specialist who’s been specifically trained on the equipment going into your home.

What being a Lennox Premier Dealer means for Manchester homeowners:

• Access to Lennox’s full residential line, including furnaces, air conditioners, heat pumps, and indoor air quality systems
• Specialists trained directly on Lennox equipment, not generalists working from a manual
• Premier Dealer status backed by Lennox’s own performance and customer satisfaction standards
• Manufacturer-backed warranty support when you install a Lennox system through GSMS — see our WOW Warranty for details

Looking to upgrade your Manchester home’s heating or cooling system? Call 603-424-8258 or contact us online to talk through Lennox options that fit your home and budget.

Get the Best Local Plumbing, Heating, and Air Experts Near Manchester, NH

When it comes to keeping your home comfortable and your systems running efficiently, GSMS is the trusted local expert Manchester homeowners have relied on for nearly 40 years. Need a quick repair, full replacement, or routine maintenance for your HVAC or plumbing system? Call 603-424-8258 today, or request service online.