Furnace Installation in Columbia, MD
A new furnace here will run from October through April every year. Tell us about the house, and a licensed contractor who covers Howard County will get in touch.
Tell us about the job
It takes about a minute.
Columbia asks a furnace to work seven months of the year
Winter nights here average 26°F, and homes need heat from October through April. That is a long season, and a new furnace has to hold up through all of it, not just the coldest weeks.
Half the homes in this area heat with electricity, and storms bring that risk home. Howard County saw 22 winter storms and 177 damaging wind events over the past ten years, and 11% of Maryland households lost power for at least 24 hours in 2024. Any new gas furnace installed today has to meet a federal minimum of 80 percent AFUE, so it turns most of the fuel it burns into heat for the house.
- 7 months
- October through April, your furnace is on duty
- 26°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Maryland requires HVAC contractors to hold a state license.
Maryland licenses HVAC contractors through the Maryland Board of Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) Contractors. To get that license, a contractor has to test with the state, and the board keeps a record of who holds one. The license belongs to the contractor, not to this one furnace job, so it tells you the person or company is qualified to do HVAC work generally.
For the furnace install itself, most cities and counties require a permit from the local building office, with an inspection once the work is done. That inspection is what checks the gas connections and venting on your new furnace, separate from anything the state license covers.
Sources: Maryland General Assembly · Maryland Department of Labor
- What size furnace does my house need?
- The right size comes from a load calculation, not the square footage of your house alone. A contractor measures your walls, windows, insulation and layout and runs those numbers through a formula called a Manual J. A furnace that's too big will short cycle and wear out faster. One that's too small will run constantly and still leave you cold on a 26 degree night. Ask the contractor for the load calculation, not just a quote, before they install anything.
- How do I know it's time to replace my furnace?
- Watch how the furnace behaves, not just how old it is. Uneven heat between rooms, a furnace that cycles on and off more than it used to, or a rise in your gas or electric bill with no other explanation are all signs it's struggling. Frequent repair calls are another sign, especially once a repair quote starts to run close to what a new furnace would cost. Homes here need heat from October through April, so a furnace that's failing has seven months a year to prove it.
- Is a high-efficiency furnace worth it?
- It depends on how much you heat and what you're comparing it to. Every non-weatherized gas furnace sold since November 2015 has to hit at least 80 percent AFUE, so even a standard model today wastes less fuel than an older one. A high-efficiency furnace sends less heat out the flue and more into your house, and that difference matters more where winters run long. With homes here needing heat from October through April, that difference gets used a lot more than it would somewhere with a short winter. A contractor can walk you through the actual models and their AFUE ratings for your house.