5-Star Quality Whole-Home Heat Pump HVAC Upgrade in Billerica, MA

How One Family Transitioned from Gas to Electric Comfort with Denommee

Introduction: Why More Homeowners Are Choosing Heat Pump Upgrades

Across Massachusetts, homeowners are increasingly making the switch from fossil-fuel-based heating systems to all-electric high-efficiency heat pumps. The motivation is clear: lower energy bills, reduced carbon footprint, improved year-round comfort, and access to unprecedented rebates and federal tax credits.

At Denommee Plumbing, HVAC & Electric, we’ve been at the forefront of helping homeowners take advantage of these opportunities. A recent project in Billerica, MA demonstrates exactly what’s possible with the right design, equipment, and professional installation.

This blog post will break down the scope of work, the equipment installed, and how this 1948-built, 1,600 sq ft, 3-bedroom single-family home qualified for a $10,000 instant Mass Save rebate and a $2,600 federal tax credit. We’ll also discuss why Denommee is uniquely positioned to handle complex projects like this that require expertise in HVAC, electrical, and gas pipefitting.

The Project: Replacing Natural Gas Hydronic Heat with a Mitsubishi Heat Pump

The homeowner’s original system relied on a natural gas-fired hydronic heating system, which was nearing the end of its useful life. Rather than reinvest in fossil fuel technology, they wanted a whole-home heat pump solution that would:

Deliver reliable heating even in subzero New England winters.
Provide efficient cooling during hot, humid summers.
Eliminate their dependence on gas for space heating.
Take advantage of state and federal incentives.

Denommee designed and installed a Mitsubishi Electric Heating & Air Conditioning 42,000 BTU Multi-Zone, Mixed-Ducted, Hyper Heat, Heat Pump Inverter system—one of the most advanced residential systems available today.

Scope of Work & Equipment Installed

Outdoor Unit

Mitsubishi MXZ-SM42NLHZ*
Variable Output Heat Pump Inverter
Hyper Heat Model (-13°F rated)
Refrigerant: R-454B

Indoor Units (Multi-Head Split, 3.5 Ton, 3 Zone)

(3) MLZ-KX06NL one-way recessed ceiling cassettes (bedrooms)
(1) SVZ-AP24NL high static, multi-positional air handler (ducted, basement)
EHM05 Backup Heat Coil for air handler

Branch Box

PAC-LMA50BC – 5 Unit Branch Box

Performance Ratings

AHRI # 215712164
SEER2: 19.5
HSPF2: 10.55
Cooling Capacity (95°F): 42,000 BTU
High Heat Output at -13°F: 48,000 BTU

Installation Highlights

Outdoor condenser installed on a raised, sound-absorbing base.
Four indoor units installed with insulated line sets, drainpipes, and wall armor.
Exterior line sets protected in white line-hide casing.
Nitrogen pressure test, vacuum pulled to below 500 microns, system charged with R-454B.
Low-voltage wiring completed, shutoffs tagged, system commissioned, and warranty registered.

Ductwork Installation

New 2.0 ton ductwork system installed in basement.
Galvanized hard-pipe, fully sealed and insulated.
Accessory pack included hangers, vibration blocks, drainage with flood shutoff, grills, filters, and 3-way diffusers.

Electrical Work

Denommee’s licensed in-house electricians handled:

New dedicated electrical feeds for the heat pump and backup heat.
Installation of 2-pole breakers, outdoor whips, and disconnects.
Full compliance with state and local electrical codes.

Rebates and Tax Credits

This project qualified for:

$10,000 Instant Mass Save rebate (applied directly to the homeowner’s quote—no waiting).
$2,600 Federal Tax Credit under the Inflation Reduction Act.

Together, these incentives made the project far more affordable and delivered long-term savings.

Why Denommee?

Cross-trade expertise: HVAC, electrical, and gas work in-house.
Elite credentials: Mitsubishi Diamond Elite Contractor, Mass Save HPIN member.
Instant rebates: Applied upfront.
Comprehensive service: Peace of Mind Memberships with annual safety assessments, discounts, and loyalty credits.
Local expertise: Serving Billerica, Acton, Concord, Westford, Nashua, and more.

Real-World Results: A 5-Star Customer Experience

Beyond technical excellence, the true measure of success is homeowner satisfaction. After this Billerica installation, the homeowner shared this 5-star review:

“We hired Denommee after receiving 3 other quotes to install a new A/C and heating system. This is the best decision we made. Denommee has been wonderful to work with, their crew has been very professional and informative throughout the whole process. We highly recommend them.”

Testimonials like this highlight why so many homeowners choose Denommee for their HVAC upgrades: a commitment to professionalism, honesty, and long-term customer care.

Conclusion: Ready for Your Own Heat Pump Upgrade?

This project is a prime example of what’s possible when you combine top-tier Mitsubishi Hyper Heat technology with Denommee’s proven expertise. The result: year-round comfort, lower operating costs, and instant savings thanks to rebates and tax credits.

If you’re considering a gas-to-electric conversion or any type of HVAC upgrade, Denommee’s team is ready to help you design the right system for your home—and deliver it with the same professionalism and quality that earned this 5-star review.

📲 Text us at 857-226-9140 or visit denommeeplumbing.com to schedule your no-cost, no-pressure consultation today.