Furnace Installation in St. Albans, VT
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Franklin County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, and winters that test the system
In St. Albans, a furnace runs from September through May. Winter nights average 11°F, which means the burner is working through most of the day and night to keep a house at temperature. A furnace sized and installed right for this climate matters more here than in a place where it only runs a few months.
A new gas furnace installed here has to meet 80.0 percent AFUE, the federal minimum for non-weatherized units. Power loss is also worth planning for. Across Vermont, 21 percent of households lost power for 24 hours or more in 2024, and the region has logged 51 winter storms and 67 damaging wind events over the past ten years. Some furnace setups can be paired with a way to keep running when the grid goes down, worth asking about during installation.
- 9 months
- September through May, your furnace is on duty
- 11°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Vermont has no state license for HVAC contractors.
There is no state board keeping a record of who does this work in Vermont, no test a contractor had to pass and no license number tied to their name. Whatever protection exists here comes from somewhere other than the state.
For a furnace installation, that protection is the local permit process. In most cities and counties, putting in a new furnace requires a permit from the building office and an inspection once the work is done. That inspection is what checks the gas connection and venting, the part of the job that can hurt someone if it is done wrong.
Source: Vermont Department of Public Safety, Division of Fire Safety
- What size furnace does my house need?
- The right size depends on your square footage, insulation, window count, and ceiling height, so there is no number that fits every house. A contractor works this out with a heat loss calculation, not a chart based on square footage alone. With winter nights averaging 11°F here, getting this calculation right matters more than it would in a milder climate. A furnace that is too big will cycle on and off too fast and wear out early. One that is too small will run constantly and still leave rooms cold.
- How do I know it's time to replace my furnace?
- Watch for rising repair calls, uneven heat between rooms, and a furnace that struggles to keep up on the coldest nights. Homes here need heat from September through May, nine months a year, so a furnace that is already stressed in a normal winter is not going to hold up. Rust near the burner, a yellow flame instead of blue, or short cycling are signs the unit is failing rather than just aging. If your furnace was manufactured before November 2015, it may run well below the 80 percent AFUE minimum required today, which means older units are burning more fuel to produce the same heat.
- Is a high-efficiency furnace worth it?
- It depends on how you heat now and how long you plan to stay in the house. A lot of homes in this area heat with fuel oil, and switching to a high-efficiency gas furnace changes both the equipment and the venting, so that decision is different from simply upgrading an existing gas furnace. A high-efficiency furnace pulls more heat out of the same fuel, which matters over nine months of heating season. A contractor can walk through what your current setup allows and price the job for your house.