A dual-fuel system combines a heat pump with a compatible gas furnace. We assess the existing equipment first and keep a sound furnace where the pairing is suitable. The heat pump carries the mild and cool days; the furnace takes over below a set outdoor temperature; one thermostat decides. You receive the scope and price before work begins.
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We install and service Daikin, Goodman, Ruud, Carrier and Bryant equipment.
A dual-fuel system uses two heat sources. The heat pump heats and cools through the refrigerant circuit. The gas furnace supplies heat when the outdoor temperature drops below the switchover point, where the furnace does the job more effectively.
The switchover point is set for the home and the equipment, and the thermostat manages it. Which heat source runs depends on the outdoor conditions, the selected equipment and the control settings.
What the Installation Covers
A dual-fuel installation is planned around the furnace that stays, or the furnace and heat pump that arrive together. The furnace is matched by efficiency class to what the home has, and the class is never crossed.
What This Covers
An assessment of the existing furnace: condition, efficiency class, venting and whether it is worth keeping
A load calculation for the home and a heat pump sized to it
A heat pump coil matched to the furnace and mounted in the correct orientation
The plenum, return box and transitions the equipment itself needs
Compatible equipment control wiring and a thermostat with dual-fuel logic, set to the manufacturer instructions
Connection to a compatible existing electrical supply within our scope
Evacuation, leak testing and the refrigerant charge set to the equipment instructions
Permits pulled and inspection handled where the work requires it
Startup readings, the switchover setting and a walkthrough of the thermostat
Who It Suits
A home with gas already at the house and a furnace in sound condition
A furnace and air conditioner reaching replacement together, where a heat pump plus furnace pair fits the home
A homeowner who wants lower operating cost on mild days without giving up gas heat on the coldest ones
A home where the existing ducts suit the furnace airflow, since we do not alter ductwork
Equipment Options
We install Daikin, Goodman, Ruud, Carrier and Bryant equipment. The pairing depends on the furnace, the coil match and the controls the equipment requires.
How a Dual-Fuel Installation Runs
We assess the furnace first
Condition, efficiency class, venting and airflow decide whether the furnace stays or is replaced alongside the heat pump.
We size and match the heat pump
The heat pump and its coil are matched to the furnace and the home before anything is ordered.
You get the whole scope in writing
The written scope names the equipment, the controls, the connection work and the sequence.
We install, set the switchover and test
Startup readings and the switchover setting are recorded and explained with you at the thermostat.
Service in Upper Montgomery County
We provide dual-fuel heat pump and furnace installation in Germantown, Clarksburg, Boyds, Montgomery Village, Gaithersburg, Derwood, Darnestown, North Potomac, Rockville, Olney, Washington Grove, Travilah and Redland.
It is the outdoor temperature at which the thermostat stops the heat pump and runs the furnace. It is set for the equipment and the home at startup and can be adjusted at a service visit.
Often, if the furnace is in sound condition and a heat pump coil can be matched to it. We assess the furnace, the coil position and the controls before quoting.
It depends on the equipment, the home's heat load and the operating setup. Dual-fuel keeps gas heat for the coldest hours, which suits some homes and not others. We compare the options for your home at the assessment.
Yes. The thermostat must support dual-fuel operation so it can manage the switchover. We select and set it to the equipment instructions.
Equipment-specific procedures follow the manufacturer instructions.
Start with the right visit
Arrange a Dual-Fuel Assessment
Arrange a service visit to assess the furnace and discuss a heat pump pairing. This visit does not confirm an installation date. Heating and cooling runs 8 AM to 7 PM, every day.
Tell us what is happening and attach photos if they help explain it. Our office follows up to understand the work. Sending a request does not book a visit. Use the booking link above or call the office to arrange one.
1
Assess the equipment.Confirm the system and the work needed.
2
Write the scope.Know the work and price before approving.
3
Check the result.Review the findings and next steps.
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20 YearsTrade experience
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Written price before work begins. Our office may call to clarify your request and explain the next step.