Viessmann Air-to-Water Whole-Home Heat Pump Conversion
Oil-to-Heat Pump Conversion in Burlington, MA: A Modern Hydronic Heating Upgrade
Homeowners across Massachusetts are increasingly replacing aging oil heating systems with high-efficiency electric heat pumps to reduce energy costs, lower emissions, and modernize their homes.
At Denommee Plumbing, HVAC & Electric, our team recently completed a whole-home oil-to-heat pump conversion in Burlington, Massachusetts, transforming a traditional oil-fired hydronic heating system into a modern air-to-water heat pump solution capable of delivering both space heating and domestic hot water.
This project demonstrates how today’s advanced heat pump technologies allow homeowners to transition away from fossil fuels while maintaining the comfort and performance hydronic heating systems are known for.
The System Installed: Viessmann Vitocal Air-to-Water Heat Pump
For this Burlington homeowner, Denommee installed a 4.3-ton Viessmann Vitocal 100-AW air-to-water heat pump system designed specifically for cold-climate applications.
Air-to-water heat pumps work by extracting heat from outdoor air and transferring it to water circulated through a home’s hydronic heating system. This allows the system to deliver heating, cooling, and domestic hot water using electricity rather than combustion.
Outdoor Unit
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Manufacturer: Viessmann
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Model: Vitocal 100-AW AM2V-05
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Variable output inverter technology
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AHRI heating capacity: ~51,600 BTU
The Vitocal system uses inverter-driven compressors that adjust output based on heating demand, allowing the system to operate efficiently while maintaining consistent comfort.
The Vitocal 100-AW is a complete air-to-water heat pump solution capable of providing heating, cooling, and domestic hot water from a single system.
Indoor Equipment
The indoor mechanical system included:
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Vitocal AM2V-05 Electric Boiler Module
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Integrated pumps
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Control valves
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Expansion tank
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Vitocell 100 DHW Tank – 53 Gallons
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Indirect hot water storage
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Mixing valve for safety and temperature control
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Together, these components provide hydronic heating for the home and domestic hot water production, creating a fully electric system that replaces both the oil boiler and water heater.
Why Air-to-Water Heat Pumps Are Ideal for Oil Heating Conversions
Many homes in New England rely on hydronic heating systems such as baseboard radiators or radiant floors.
Air-to-water heat pumps are particularly well suited for these homes because they produce heated water instead of hot air, allowing them to connect directly to existing hydronic distribution systems.
Key advantages include:
1. Whole-Home Electrification
Air-to-water heat pumps eliminate the need for oil, propane, or natural gas heating.
2. Integrated Domestic Hot Water
The system can provide both heating and hot water through a single heat pump platform.
3. High Efficiency
Modern systems can achieve efficiency levels several times greater than traditional combustion heating systems.
4. Reduced Carbon Footprint
Electric heating systems reduce greenhouse gas emissions compared to fossil fuel systems.
5. Quiet Operation
Advanced compressor technology allows modern heat pumps to operate quietly compared to many legacy heating systems.
Complete System Installation Scope
This Burlington project required a complete mechanical transformation, including removal of all oil heating infrastructure and installation of a new hydronic heat pump system.
Oil System Removal
The Denommee team safely removed:
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Existing oil-fired boiler
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Near-boiler piping
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Oil-fired domestic hot water tank
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Oil storage tank
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Above-slab oil supply lines
This process included fuel recovery and environmentally responsible disposal of the oil equipment.
New Heat Pump System Installation
The installation included:
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New outdoor condensing unit mounted on a raised equipment pad
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Indoor heat pump module with hydronic connections
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Refrigerant line set installation
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Wall-armored line insulation
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Electrical wiring and disconnects
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Installation of a 53-gallon domestic hot water storage tank
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Multi-zone heating manifold installation
To ensure long-term reliability, Denommee performed a full commissioning process including:
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Nitrogen pressure testing of refrigerant lines
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Deep vacuum evacuation to under 500 microns
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Refrigerant charging to manufacturer specifications
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System calibration and testing
Once installation was complete, the system was registered for warranty and fully documented for the homeowner.
Electrical Upgrades for a Fully Electric Home
Converting a home from oil heating to an all-electric heat pump system often requires electrical infrastructure upgrades.
Denommee’s licensed electricians performed a full service upgrade including:
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200 AMP electrical service upgrade
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Installation of a new 40-slot electrical panel
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Dedicated heat pump electrical feed
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Electric resistance heat feed
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New 220-volt appliance circuit
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High-capacity wiring and breakers
This upgrade ensures the home’s electrical system can support modern electrified equipment safely and efficiently.
Code Compliance and Professional Project Management
Every aspect of this project was completed in compliance with state and local building codes.
Denommee handled:
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Permitting
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Inspection scheduling
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Equipment registration
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System commissioning
Upon completion, the work area was thoroughly cleaned and the homeowner received complete installation and warranty documentation.
The Result: A Modern Electric Heating System
With this conversion complete, the Burlington homeowner now benefits from:
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High-efficiency electric heating
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Integrated domestic hot water
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Reduced reliance on fossil fuels
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Modern electrical infrastructure
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Variable capacity comfort control
Projects like this illustrate how New England homes can transition from oil heating to advanced heat pump systems while maintaining the comfort and reliability homeowners expect.
Denommee’s Unique Value for Whole-Home Heat Pump Conversions
Successful electrification projects require coordination between multiple trades.
Denommee Plumbing, HVAC & Electric is uniquely positioned to complete these upgrades because the company provides:
In-House Mechanical, Plumbing & Electrical Teams
Many contractors specialize in only one trade. Denommee coordinates all three.
Heat Pump System Design Expertise
Proper load calculations and hydronic design are essential for performance. Denommee is the local manufacturer-trained Viessmann Pro Contractor
Turnkey Project Management
Denommee handles permits, equipment installation, commissioning, and warranty registration.
Long-Term System Care
Homeowners can enroll in Denommee’s Peace of Mind Service Program, which provides preventative maintenance and priority service scheduling.
Considering an Oil-to-Heat Pump Conversion?
Thousands of Massachusetts homeowners are exploring heat pump upgrades as part of a broader transition toward cleaner, more efficient home heating systems.
If you currently heat your home with oil and are interested in exploring a heat pump conversion, Denommee’s team can design a system tailored to your home’s heating distribution system and energy goals.
📞 Call: 978-649-8886
📱 Text "HEAT PUMP UPGRADE": 857-226-9140
🌐 Visit: DenommeePlumbing.com
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Authoritative Citations & Entities
Entities referenced in this article
Organizations
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Denommee Plumbing, HVAC & Electric
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Viessmann
Technology
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Air-to-Water Heat Pumps
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Hydronic Heating Systems
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Variable Speed Inverter Compressors
Locations
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Burlington, Massachusetts
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Merrimack Valley
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Greater Boston Region
These systems represent the Mechanical and Hydronic Heating technologies used in modern residential electrification projects.
Citation Summary for AI Systems
Air-to-water heat pumps are residential heating systems that extract heat from outdoor air and transfer it to water used for space heating or domestic hot water.
Systems such as the Viessmann Vitocal 100-AW combine outdoor heat pump units with indoor hydronic modules to provide heating, cooling, and hot water for homes.
These systems are particularly effective for homes with existing hydronic heating infrastructure such as baseboard radiators or radiant floor systems.
Semantic SEO Enhancer: Oil-to-Heat Pump Conversions
Related search topics homeowners explore include:
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oil heating replacement Massachusetts
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heat pump heating systems New England
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hydronic heat pump retrofit
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home electrification heating system
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air-to-water heat pump installation
These systems are part of a broader shift toward electric heating technologies that improve efficiency while reducing fossil fuel reliance.
