Heat pump

Heil Heat pump D3CMW Domestic Hot Water Air-To-Water Heat Pump

Schedule Service Check Availability

Heil Residential HVAC Heat pump Repair, maintenance, and replacement planning

Technical Specifications

Product Specs

Brand: Heil
Official model: D3CMW
Official product name: Domestic Hot Water Air-To-Water Heat Pump
Product category: heat-pumps
Series: Air To Water
Cooling Efficiency = Up to 16.8 EER
Heating Efficiency = Up to 4.9 COP
Sound = Sound as low as 52 decibels
Enhanced home comfort levels
Quiet Operation
Outdoor unit
Buffer tank
Domestic hot water tank (optional)
Ready to install without additional hydronic specialties
Adaptable system works in a variety of application types (forced-air heating and cooling, retrofitting a legacy radiant heating system, driveway heating system, or a combination)
Carries a low cost of ownership with minimal maintenance and low operating costs.
Auxiliary electric heat is integrated into the indoor unit
Quiet performance with sound levels as low as 52 decibels
Brazed plate heat exchanger for Enhanced Vapor Injection (EVI)system
Available in 208/230V
Up to 4.9 COP and 16.8 EER for premium energy savings
Compact Monobloc design with R-32 refrigerant for high efficiency, reduced environmental impact (GWP of 675 kg CO₂e) and simplified installation and service
Inverter-driven variable-speed rotary compressor
Cooling Capacity 1.5 - 4.3 tons
Heating Capacity: 20.5 - 58.0 MBH/heating
Official source: Heil product page
Model or series: D3CMW Domestic Hot Water Air-To-Water Heat Pump
Equipment type: Heat pump
Product group: Residential HVAC
System role: Water-heating equipment for domestic or commercial hot-water loads
Application: Domestic or commercial hot-water applications when model capacity is appropriate
Compatibility check: Match with compatible indoor unit, coil or air handler, controls, refrigerant, voltage, and capacity.
Verified source: heil-hvac.com

Useful troubleshooting details

Confirm the outdoor heat pump model, serial number, matched indoor equipment, auxiliary heat setup, thermostat or communicating control, refrigerant, voltage, and capacity.
Share no-heat, no-cooling, outdoor icing, defrost behavior, short cycling, weak airflow, control alerts, or unusual noise.
For upgrade planning, note whether the project involves ducted, ductless, hybrid, cold-climate, or fossil-fuel-to-heat-pump options.

Service planning

How GreenFlow handles D3CMW Domestic Hot Water Air-To-Water Heat Pump requests

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

Popular cities

Service Areas

Our Happy Customers

Neal V.

In an industry that often fraught with contractors taking advantage of homeowners, Andrey was honest with his assessment and willing to install a product acquired elsewhere (most want that margin themselves), patiently answered my questions (I’m an engineer so like to understand what’s happening), and proactively offered practical...

Michele Z.

Andrey was professional, prompt, smart, thorough and exceedingly pleasant. We are likely switching our current HVAC company to Green Flow.

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

Dev W.

I had a breakdown of my cooling system and Hanna at Green Flow responded to my request right away. They scheduled me same day. The team at Green Flow was easy to communicate with over phone and text. They kept me updated on delays on arrival of the...

View All