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Sizing a heat pump for Franklin County means accounting for how far outdoor temperatures drop and how long the cold holds, because capacity falls as the mercury does. Homes in Franklin County, VT run heat about nine months a year, from September through May. A system that looks adequate on a mild October morning can be undersized by February, when the heat exchanger is working hardest and outdoor air offers the least to extract. Contractors have to run a load calculation that reflects the coldest stretch, then set back-up heat at the right threshold, or the homeowner ends up heating on resistance strips for weeks at a time.
Ductwork laid down for a furnace or a window unit does not automatically carry a heat pump. Half the homes in Franklin County, Vermont were built in 1979 or earlier (2020-2024 ACS 5-year). That history shows up in the actual dimensions of the ducts, the path they take through the house, and what a contractor has to reroute or resize before a new system can move air the way it needs to. The electrical service raises its own question: what the panel was built to handle and what a heat pump draws are often two different numbers, and the contractor has to establish that gap before any other pricing makes sense.
What a Heat Pump Installation Puts in Your Home
The outdoor unit sits on a pad or bracket outside the house and holds the compressor and the main coil. Inside, an air handler or wall-mounted head unit delivers conditioned air to the living space. Each indoor unit connects to a specific zone, so the contractor places them where the house needs coverage.
A refrigerant line set runs between the outdoor and indoor units, carrying the working fluid through both sides of the system. A condensate drain line runs from each indoor unit to remove moisture, and a thermostat or control panel mounts on the wall to manage the whole system.
The drawing shows a representative layout, and a licensed contractor determines exactly which components and configurations apply to your home.
Find a contractor in Franklin CountyFranklin County, Vermont, by the numbers
128 severe weather events were recorded in Franklin County, Vermont between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Franklin County, Vermont were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFranklin County, Vermont holds 23,019 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 77.4% of the occupied homes in Franklin County, Vermont (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesHeat Pump Installation Rules for Franklin County, Vermont2 sourced codes and standards
Licensing and Legal Requirements in Franklin County, Vermont
Vermont splits the trade across two specialty licences and a contractor may hold one without the other: field A1 covers automatic gas or oil heating including geo-thermal and ground source heat pumps, and field C3 covers refrigeration or air conditioning including air-to-air heat pumps.
Vermont reaches HVAC work through its electricians’ licence rather than an HVAC licence, and the requirement stops at the front door of a house: anyone performing electrical work in Vermont must be licensed as an electrician unless the work is in a residential building containing two or fewer dwelling units.
Severe Weather Events in Franklin County
Heating loads in Vermont are shaped by what the weather actually does here, not by regional averages. A heat pump sized and installed for local conditions handles demand better than one spec'd to a generic climate, which is why weather history belongs on a page about equipment decisions.
128 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.