Alliance Comfort Services

Furnace installation in Raleigh, NC

Most of what decides a furnace installation in Raleigh, NC is not the furnace. It is the venting, the gas supply and the air the thing has to breathe, and all three are checkable before anybody writes a number. A licensed North Carolina contractor answers this number.

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The three things that move a furnace quote

A furnace changeout looks like swapping one box for another and mostly is not. These are the three that decide the real scope, and all three are visible on a visit.

What each of the three site conditions decides about a furnace replacement
What gets checkedWhy it decides the job
VentingA condensing furnace does not use a chimney. It vents in plastic pipe through a wall, because it pulls so much heat out of the combustion gases that they leave cool. That changes where the furnace can sit and what the old flue is then doing.
Gas supplyThe line and the meter have to carry the new appliance alongside everything else on them. A line that was adequate for the old furnace is not automatically adequate for the new one, and this is the classic reason a price moves on installation day.
Combustion airA furnace burning gas in a sealed closet needs a supply of air to burn. Tightening a house up over the years quietly changes this, and the fix ranges from a vent in a door to running the new furnace as a sealed combustion unit.

The one worth asking about specifically: an orphaned water heater. If your furnace and your gas water heater share a chimney and the new furnace stops using it, that flue may be far larger than the water heater alone can keep warm, which can stop it drafting properly. It is a known consequence with known fixes, and the time to find it is before the quote rather than after.

All three are things somebody has to look at. That visit is the call, and the number that comes out of it is one we stand behind.

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The condensate nobody mentions

A high-efficiency furnace produces water. That is what the efficiency is: heat pulled out of the exhaust until the moisture in it condenses. It comes to a few gallons on a cold day and it has to go somewhere, which the furnace it replaced never needed.

In an attic or a closet that means a drain line, sometimes a condensate pump, and a route to somewhere that is allowed to receive it. It is a small piece of work and it is a common thing to find missing on an installation somebody else did quickly. It is also slightly acidic, which is why the material the line is made of is not a matter of taste.

Where this sits next to the other decisions

If you have not settled on gas at all, that is the first question and it is worked through on heating installation in Raleigh, which compares a furnace against a heat pump and against running both.

If the furnace is broken rather than finished, a good share of what fails on one is a wear part rather than the appliance, and that is furnace repair. What moves the price on any replacement, and how to tell a repair from a replacement, is on AC installation and replacement.

Alliance Comfort Services LLC is licensed in North Carolina, number L.34059, covering Heating Group 2 Contractor and Heating Group 3 - Class I Contractor. The person who checks the venting is the person who installs the furnace. Financing is available and we go through it on the call.

How the job goes

  1. The existing furnace and where it lives

    A closet, an attic, or a crawlspace changes the job as much as the equipment does. So does what else is connected to the same flue.

  2. Venting, gas and combustion air get checked before a number is written

    These are the three that move a price after the fact when nobody looks first, and all three are visible on the day of the visit.

  3. A load calculation, then a written scope

    The size comes from the house, not from the rating plate on the old unit, which was not necessarily right when it went in.

  4. Installation, then combustion is measured

    The furnace is commissioned with an analyzer rather than by ear, temperature rise is set within the manufacturer range, and the safeties are tested before anybody leaves.

Common questions

What is the difference between a standard and a high-efficiency furnace, in practice?
A condensing furnace pulls enough heat out of the combustion gases that they leave cool and wet, so it vents in PVC through a wall and produces condensate that has to drain somewhere. A standard furnace sends hotter, drier gases up a conventional flue. That difference decides most of the work in the room, not just the number on the label.
Can a new furnace use my existing chimney?
Sometimes, and it is one of the first things worth checking. A condensing furnace will not use it at all. If a water heater shares that chimney and the furnace stops venting into it, the flue can end up oversized for the water heater alone, which is a real safety consideration and not a detail to leave until installation day.
Do I need a bigger gas line?
Possibly, and it depends on what else is on it and how far it runs. It is checked before quoting rather than discovered afterwards, because a gas line change found on installation day is the classic reason a price moves.
Should I replace the air conditioner at the same time?
Worth asking, because the indoor coil usually sits on top of the furnace and the two get handled together whether you plan it or not. If your cooling side is close to the end of its life, doing both once is normally less total work and less disruption than doing them separately.

What customers say

5.0 out of 5, from 25 reviews on Google

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Replacing a gas furnace in Raleigh?

Gas furnaces from Carrier, Trane, Lennox, Goodman, Amana and the rest of the list are installed and serviced. Everything we cover in Raleigh is on one page.

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