Ductless, ducted and hydronic
Heat Pump Services for New Hampshire Homes
Explore ductless, ducted and hydronic options, plus water heating, maintenance and no-heat service.
Ductless, ducted and hydronic
What Dave installs and supports
The right category depends on the building, the existing distribution and the comfort problem you are trying to solve.
ANSI/ACCA 5 QI-2015
The procedure behind the equipment
Code is the minimum an inspector accepts. The published HVAC Quality Installation Specification asks the work to prove more than that, and this is the sequence Dave follows on a job.
The load is calculated from the house
Heating and cooling loads come out of the building itself, using ACCA Manual J: the envelope, the windows, the orientation, the leakage. The tonnage of the equipment coming out is evidence of a decision somebody made years ago, not a measurement of what the house needs now.
Capacity is selected against that number
Equipment is matched to the calculated load rather than to a nameplate. On a cold-climate heat pump that means the capacity it holds at the design temperature, which is the figure that decides how the house feels in February.
The distribution is designed to deliver it
A ducted system gets a duct design. A ductless system gets line-set sizing and head placement worked out room by room against each room's own load, because a head in the wrong place is a comfort problem no amount of capacity solves.
Airflow and charge are measured, then recorded
Static pressure gets read with a manometer. Refrigerant charge gets confirmed against the manufacturer's specification using superheat or subcooling, which is the check most responsible for how long a compressor lasts. Both are measurements, and measurements get written down.
Combustion and venting are tested on fuel-fired equipment
Anything that burns fuel gets a combustion and venting safety test. That covers the boiler or furnace a hybrid system keeps in service, which is why hybrid work sits inside this procedure rather than beside it.
More than one way to move heat through a house
The house decides which path deserves a closer look
Dave's service range
- Ductless systems for room-by-room comfort
- Ducted systems for whole-home air distribution
- Air-to-water systems for hydronic applications
A one-path sales pitch
- Starts with a preferred product instead of the house
- Treats every distribution system as interchangeable
- Leaves hydronic homeowners without a heat-pump path
Find out what your house actually needs
A conversation with the person who will do the work, not a salesperson working from a script.