High-Efficiency HVAC Upgrade in Westford, MA

How Denommee Delivered a Smarter, Dual-Fuel Comfort Solution for a 4,300 sq ft Home

For homeowners in Westford, MA and surrounding Middlesex County towns, replacing an aging furnace and air conditioning system is more than a home improvement project—it’s a long-term investment in comfort, energy efficiency, and reliability. And as more homeowners explore hybrid heat pump solutions, the quality of the installation and the expertise of the contractor performing the work have never been more important.

Denommee Plumbing, HVAC & Electric (DPHE) recently completed a comprehensive HVAC upgrade for a 1991-built, 4,300 sq ft single-family home in Westford. The project involved removing a failing 15-year-old furnace and A/C system and replacing it with a high-performance Bosch dual-fuel hybrid heating system—a combination of a natural gas furnace and a variable-capacity heat pump designed to maximize comfort and minimize utility costs.

This installation showcases why more homeowners in Massachusetts are choosing hybrid heating systems and why Denommee continues to be one of the most trusted HVAC service providers in the region.

Why Dual-Fuel Heating Is Becoming a Top Choice for New England Homes

Massachusetts homeowners experience the full range of New England weather—humid summers, frigid winters, and big temperature swings in between. Dual-fuel systems (also known as hybrid heat systems) have become increasingly popular because they combine:

A high-efficiency natural gas furnace for extreme cold
A variable-capacity heat pump for most heating days and all summer cooling

The result is lower energy costs, quieter operation, and superior year-round comfort.

For this Westford homeowner, a dual-fuel upgrade made perfect sense. Their outgoing 15-year-old system struggled in the winter, cooled inefficiently in the summer, and no longer met the home's comfort demands. By choosing a Bosch Ultra heat pump paired with a Bosch 96% AFUE gas furnace, they dramatically improved comfort while setting the home up for long-term energy savings.

Project Overview: Replacing a Failing 15-Year-Old System With a High-Efficiency Bosch Hybrid Heat Upgrade

The homeowner selected Denommee after comparing multiple contractors—and ultimately chose Denommee based on transparency, reputation, technical expertise, and a clear project plan. Denommee’s team managed the entire project from permitting to commissioning, ensuring a clean and code-compliant installation.

Equipment Installed

🔥 Bosch 96% AFUE 2-Stage Natural Gas Furnace

Model: BGH96M100D5C
Max Output: 120,000 BTU
ECM blower motor for quieter, more efficient airflow
Two-stage gas valve for smoother, more even heating

This furnace provides exceptional heating on the coldest days while keeping fuel usage low thanks to its staged operation.

❄️ Bosch Ultra 3.0 (5 Ton) Variable Capacity Heat Pump Inverter

Model: BOVA-60MTB-M19E
Cooling Capacity (95°F): 52,000 BTU
Heating Output (47°F): 55,000 BTU
Heating Output (5°F): 48,000 BTU
Efficiency: SEER2 18, HSPF2 9.5

This heat pump handles most of the home's heating throughout the year—significantly reducing natural gas consumption while providing premium cooling performance.

🌬️ Bosch 4.5 Ton Cased AC Coil

Model: BMAC4860DBTA**
Designed to match the output and efficiency of the Bosch Ultra heat pump
Ensures optimal refrigerant flow and system performance

📱 Thermostat

Ecobee Smart Thermostat (State 7)
Allows intelligent staging between heat pump and furnace
Integrates humidity management, learning algorithms, and app-based control

Detailed Installation Scope

Denommee’s licensed technicians performed a full mechanical upgrade, including:

Removal & Disposal

Existing furnace
AC coil
Flue pipe
Outdoor condenser
All debris responsibly removed

Installation Tasks

Added 4" premium filter box for improved indoor air quality
Modified ductwork to match new equipment airflow requirements
Installed new flue pipe to meet updated building codes
Connected to existing natural gas piping and pressure-tested
Installed heat pump on a new pad, ran new line set
Nitrogen pressure test followed by deep vacuum (< 500 microns)
Charged with R-454B refrigerant, the newest low-GWP refrigerant
Connected all line voltage and control wiring
System startup with full commissioning and performance verification
Tagged all necessary shutoffs
Registered all equipment for full manufacturer warranty

Electrical Work

New outdoor whip & disconnect included

Added Value: A 1-Year Peace of Mind Service Program Membership

This membership includes:

Priority scheduling
Discounted repairs
Annual HVAC, plumbing & electrical assessments
Waived dispatch fees
Loyalty credits toward future upgrades

This ensures the homeowner’s new investment stays protected and properly maintained.

Why Homeowners Choose Denommee for HVAC Upgrades

Upgrading to high-efficiency heating and cooling equipment is a major investment—but selecting the right contractor is just as important as choosing the right system.

Here’s what sets Denommee apart in projects like this Westford upgrade:

1. Expertise With Hybrid & High-Efficiency Heat Pump Systems

As a Bosch Gold-tier Home Comfort PRO Contractor, Denommee meets the highest standards for:

Installation quality
System design
Technical knowledge
Customer satisfaction

Bosch awards this status to top-performing contractors with proven track records.

2. In-House Electricians & Licensed Gas Pipefitters

Hybrid systems require:

Electrical modifications
High-voltage connections
Gas piping adjustments
Safety testing & permitting

Denommee does all of this with in-house staff, not subcontractors—ensuring quality control and faster scheduling.

3. Flat-Rate, Upfront Pricing

No surprises. No hourly estimates. No vague “range” pricing.

Homeowners always know exactly what the job will cost.

4. Comprehensive Commissioning & Testing

Many HVAC companies skip proper setup steps like:

Static pressure testing
Refrigerant weighing
Combustion analysis
Heat pump staging configuration

Denommee performs every required test and records the results for the homeowner.

5. Full Support With Rebates & Tax Credits

Mass Save rebates and federal incentives can be confusing.

Denommee handles:

Rebate qualification
AHRI matching
Documentation
Submission support

Homeowners maximize savings—often $5,000 to $10,000 on qualifying projects.

The Result: A More Comfortable, Efficient Westford Home

With the Bosch Ultra heat pump handling the bulk of the heating load and the 96% AFUE furnace stepping in during extreme cold, this homeowner now enjoys:

Lower gas consumption
Lower electric bills
Reduced noise levels
Better humidity control
Cleaner air
Improved comfort across all seasons

And with the included Peace of Mind Membership, their investment remains protected for years to come.

Is a Hybrid Dual Fuel Heat Pump System Right for You?

Hybrid HVAC systems are ideal if:

Your home has an existing gas boiler or hydro-air heating system
You want to reduce energy usage and emissions
You’re eligible for rebates and tax credits
You want the quiet comfort and zoning benefits of inverter heat pumps
You’re planning to fully electrify your home over time

Denommee offers free consultations, both in person and virtual, and can even provide online pricing estimates with their HVAC System Quote Tool.

Ready to Upgrade Your Comfort?

Whether you’re building new, remodeling, or replacing aging HVAC systems, Denommee Plumbing, HVAC & Electric provides unmatched value, integrity, and performance for high-end homes across: