Furnace Installation in Mission, KS

A new furnace in Mission has to deliver on the coldest night of a Johnson County winter — a roughly 13°F design low — and fit into a compact, often older home. 7th Degree Heating and Air installs gas and electric furnaces across Mission, sized with a load calculation, fitted to the home’s space and ductwork, and started up with combustion verified and carbon monoxide checked. We’re close by in Leawood, a short drive away.

Right for a Compact Mission Home

Mission’s housing brings its own furnace considerations. Older homes often have an aging unit in a tight mechanical space with original ductwork, where a careful replacement and airflow attention matter as much as the furnace itself. We run an ACCA Manual J calculation, match equipment with Manual S, and walk you through the tradeoff between a standard 80% AFUE furnace and a high-efficiency 90%+ condensing unit — the condensing furnace saves gas but needs PVC venting and a condensate drain, which we plan a route for in a compact home. Right-sizing matters here: an oversized furnace forced through small ductwork short-cycles and wears out early.

What Our Mission Installation Includes

• Manual J load calculation sized to your compact home.
• Ductwork and venting assessment — confirming airflow and planning condensing-furnace venting where needed.
• Gas line and pressure verification on your natural gas service.
• Old furnace removed and disposed of.
• Permits pulled through the Johnson County building department, warranty registered.
• Combustion verified on startup — manifold pressure set, carbon monoxide measured air-free.

Frequently Asked Questions

What size furnace does my Mission home need?

The size a Manual J load calculation says you need, not the old furnace’s size, which may have been oversized. We measure your home’s heat loss and size to match. In a compact home with smaller ductwork, right-sizing also keeps the furnace from straining against ducts that can’t carry too much air.

Should I get an 80% or a 90%+ AFUE furnace?

AFUE is how much fuel becomes usable heat. An 80% furnace costs less up front and uses standard metal venting; a 90%+ condensing furnace captures more heat, vents through PVC, and needs a condensate drain, saving gas over time. In a compact home we factor in the venting route, then tell you which makes sense.

Can a high-efficiency furnace fit in my compact home?

Usually yes, with planning. A condensing furnace needs PVC intake and exhaust venting and a condensate drain, and in a compact or older Mission home we plan a practical route during the install. Where that routing is impractical, an 80% furnace is a perfectly good choice — we’ll lay out the realistic options.

Do you verify safety after installation?

Always. We set manifold gas pressure to spec, measure carbon monoxide air-free at startup, confirm the venting draws correctly, and verify the heat exchanger and safeties. A furnace is a combustion appliance, and we don’t call an install finished until it’s confirmed safe.

How long does a furnace installation take?

A standard replacement is usually a single day. Switching efficiency types (which changes the venting), relocating the unit, or routing new venting in a tight space can extend it. We give you a realistic timeline with the quote.

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Contact 7th Degree Heating and Air

Serving Mission and all of eastern Johnson County, including Leawood, Overland Park, Prairie Village, Merriam, and Lenexa, with 24/7 emergency service.

• Emergency Line (24/7): (913) 354-6552
• Address: 12720 Catalina St, Leawood, KS 66209
• Email: info@7thdegreeheatingandair.xyz
• Johnson County Class “DM” Mechanical License: DM-24-11873
• EPA Section 608 Universal: EPA-608-U-457921

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Office Hours

• Emergency Service: 24 hours a day, 7 days a week
• Office Staff: Monday – Saturday, 9:00 AM – 5:00 PM
• Sunday: By appointment
• Closed: Holidays (emergency line always active)