- Services
- New Construction Installs
New Construction Installs
Custom HVAC Systems for New Homes & Additions
From planning to installation, we work with homeowners and builders to install complete HVAC systems for new builds.
When you’re building a new home, addition, or investment property, you need an HVAC partner who understands both the big picture and the fine details. At Hollis Heating and Cooling, we specialize in new construction HVAC installations that are energy-efficient, code-compliant, and perfectly matched to your space.
Whether you’re a homeowner planning your forever home or a contractor managing timelines and trades — we deliver quality workmanship, open communication, and on-schedule installs you can count on.


Tailored Design, Seamless Integration
We work closely with your builder or general contractor to ensure HVAC is smoothly integrated into your overall build plan. From initial design to final walkthrough, we help you select the right system, layout ductwork efficiently, and install everything with precision.
We install:
- Central air systems
- Heat pumps
- Mini split systems
- Whole-home ventilation
- Smart thermostats and zoning controls
What’s Included in Our New Construction Services:
- Load calculations & system sizing
- Equipment recommendations based on layout, goals & budget
- Ductwork layout, fabrication, and installation
- Mini split & heat pump configurations for homes without ducts
- Local code compliance and permitting coordination
- Communication with builders and other trades
- Final system testing and homeowner education
Call us today at (603) 404-7094 to schedule a planning consult or send us your build plans.
Our Services

Ready to Get Started
Contact DM Plumbing today for a free consultation. Let us help you with all your plumbing, heating, and remodeling needs.