Gas Furnaces

Reliable Heat. Built for Cold New England Winters.

When the temperature drops, you need more than a space heater or ductless system—you need dependable, powerful heat. Our gas furnaces are designed to keep your home warm, efficient, and worry-free, even during the coldest stretches of the year.

At SumZero, we install modern furnace systems built for performance, safety, and energy savings—backed by expert design and installation you can trust.

Why Choose High Efficiency Gas Furnaces?

Old furnaces can waste fuel, hike up your utility bills, and struggle to keep up when it matters most. Our high efficiency gas furnaces solve all that—with comfort that’s even, quiet, and cost-effective.

• Up to 98% fuel efficiency
• Sealed combustion for safety and performance
• Quieter operation and faster warm-up times
• Smaller carbon footprint and lower monthly bills
• Eligible for rebates and Mass Save® financing

What to Expect from a Professional Gas Furnace Installation

Smart, Customized System Design

We don’t take shortcuts. Every gas furnace installation begins with a full assessment of your home’s layout, insulation levels, and comfort needs—ensuring you get the right size and setup.

Clear Understanding of AFUE Ratings

Not all furnaces are created equal. We help you compare models using AFUE ratings (Annual Fuel Utilization Efficiency)—so you know exactly how much of your energy dollars are going into actual heat. The higher the AFUE, the lower your monthly bill.

Seamless Integration with Whole Home Heating Systems

Whether you’re replacing an old furnace or upgrading your home heating system, we’ll handle everything—ductwork modifications, smart thermostat integration, zoning, and more. It’s all part of our turnkey approach.