Furnace Installation in Merriam, KS
A new furnace in Merriam should be sized right, priced fairly, and explained plainly — and it has to deliver on the coldest night of a Johnson County winter, a roughly 13°F design low. 7th Degree Heating and Air installs gas and electric furnaces across Merriam, sized with a load calculation, fitted to the home, and started up with combustion verified and carbon monoxide checked. We’re a short drive up I-35 from our Leawood base.
Practical Heating for Merriam’s Homes
Many Merriam homes are modest and older, with an aging furnace often in a tight mechanical space and original ductwork. The right install respects that — a correctly sized unit fitted to the home, not the biggest furnace on the truck. We run an ACCA Manual J calculation, match equipment with Manual S, and explain the honest 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; in many practical Merriam homes a well-installed 80% furnace is a perfectly sound, budget-friendly choice, and we’ll say so when it is.
What Our Merriam Installation Includes
- Manual J load calculation sized to your home — right-sized, not oversized.
- Honest efficiency guidance — 80% vs 90%+ explained for your home and budget.
- 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 Merriam 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 — a right-sized furnace runs efficiently and lasts, while an oversized one short-cycles and wears out faster.
- 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, needs a condensate drain, and saves on gas over time. For many practical Merriam homes, a well-installed 80% furnace is a sound, budget-friendly choice — we’ll run the honest comparison and tell you which fits.
- Do you push the most expensive option?
- No. We size and recommend based on your home and budget, not on what’s most profitable to sell. If a standard-efficiency furnace is the right call for your home, that’s what we’ll recommend. The goal is a system that fits and lasts, not the biggest invoice.
- 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 adding gas or electrical work can extend it. We give you a realistic timeline with the quote.
Contact 7th Degree Heating and Air
Serving Merriam and all of eastern Johnson County, including Leawood, Overland Park, Prairie Village, Mission, 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
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)