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What Size Furnace Does a Loveland Home Need?
The honest answer is: whatever a Loveland-specific load calculation says, and that number is different here than anywhere else we work. Three reasons:
First, altitude. Every gas furnace loses output as elevation rises, because thinner air carries less oxygen for combustion. At Loveland's 5,000 feet, a furnace delivers meaningfully less heat than its nameplate rating suggests, and manufacturer derate tables have to be applied before a model is selected.
Second, climate. Loveland's 6,608 HDD65 heating load is the highest in McCormick's territory, about 22% above Greeley's 5,431. A furnace that keeps a comparable Greeley home comfortable will run long, strained cycles in a Mariana Butte winter.
Third, the housing stock complicates it further. Loveland's median home was built in 1993, but the split is wide: 34.1% of housing predates 1980 where original ductwork, envelope leakage, and insulation levels drag the load calculation upward. Meanwhile, 38.5% is post-2000 construction in areas like Seven Lakes North and Centerra / Millennium East, where tighter envelopes often mean the smaller correctly-derated furnace is the right call.
We measure; we don't assume.
What Does a Furnace Installation Involve in Loveland?
The full installation process, from equipment selection and combustion venting to ductwork transitions and commissioning, is covered on our heating installation page. What's different in Loveland is the physical work itself, and it starts before the truck leaves.
Loveland sits at 5,000 feet, and that reshapes model selection. A furnace's nameplate rating describes its output at sea level. Up here, thinner air means less heat from the same unit. So we correct every candidate model against the manufacturer's altitude derate table first. Only then do we match it to your home's calculated load.
Altitude also shapes the venting work. Most modern replacements are high-efficiency condensing furnaces, which vent in PVC and produce condensate. In Loveland, we design those exterior details around the city's 30-inch frost depth criterion. That number matters because a frozen condensate line shuts the furnace down, and it fails in exactly the weather you bought the furnace for.
The last step is commissioning. We tune the combustion for the thin air the furnace will actually burn, not the air it was bench-tested in. Then we handle the city's permit and inspection, which get their own section below.
When Is Replacement the Right Call Rather Than Repair?
If your furnace is repairable and mid-life, we'll say so. Furnace repair in Loveland is often the right answer, and that page covers diagnosis and same-visit fixes. Replacement becomes the better engineering decision in a few specific Loveland situations.
If your home is in that 34.1% of Loveland housing built before 1980 and the furnace is original to a previous remodel, the unit was almost certainly sized before anyone applied an altitude derate. This means it has been under-delivering through every one of Loveland's 6,608 heating degree days, and repairing it preserves the wrong furnace. If a heat exchanger is cracked, replacement is mandatory, not optional. And if repair visits are becoming a pattern during the heating season, Loveland's heavy winter load means each subsequent failure happens under maximum stress, when parts and schedules are tightest.
One planning note: because gas service in Loveland is provided by Xcel Energy while electricity comes from the city's own Loveland Water and Power, some homeowners replacing a furnace ask about changing fuel type entirely. If that's on your mind, our heat pump installation page explains how cold-climate heat pumps are evaluated for homes at Loveland's elevation.
Fast after-hours emergency HVAC service when your system can't wait.
Who Permits a Furnace Replacement in Loveland?
The City of Loveland Building Division permits this work, not the county, and not the utility. The mechanism is the city's HVAC Fast Track application, built for like-for-like replacements. One extra step applies if the new furnace vents in PVC, as most modern condensing units do. In that case, the city also requires an Exhaust Test Certification before sign-off. From there, the work is inspected against the 2024 ICC family of codes, which Loveland has enforced since July 1, 2026.
The permit matters well beyond inspection day. An unpermitted furnace swap can stall a future home sale. It can also undercut your manufacturer warranty, since coverage often depends on documented, code-compliant installation. That's why McCormick pulls the Fast Track permit on every Loveland job, schedules the inspection, and delivers a system that passes on the first visit. The paperwork is part of the installation, not an extra.
Frequently Asked Questions (FAQ)
Getting a Furnace Installed in Loveland
McCormick Heating & Cooling has served Northern Colorado since 2004, earning more than 800 five-star Google reviews along the way. Our technicians are NATE and EPA-certified, and the company is insured in Colorado.
Call (720) 217-4801
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McCormick Heating & Cooling · 2881 S 31st Ave #3, Greeley, CO 80631, United States.
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