HVAC Case Studies
Real jobs, real diagnoses, real outcomes — organized by city. Each case study walks through the customer’s situation, what we measured during diagnosis, the options we presented, the work performed, and how the system performed afterward. We publish these so prospective customers can see how we actually think and work, not just the marketing version.
Names and identifying details have been generalized or omitted to protect customer privacy. Equipment models, refrigerant types, capacities, and technical findings reflect typical work for the issue described.
Leawood, KS
Emergency No-Heat Restoration
A cracked heat exchanger discovered during a January no-heat call — what we did, why we shut the system down, and how we got the family warm again safely.
Two-Stage Furnace Upgrade
Replacing an oversized 14-year-old single-stage furnace with a properly-sized two-stage unit, fixing cold spots and noise in the process.
Ductless Mini-Split for a Bonus Room
Solving a bonus room that ran 10–12°F hotter than the rest of the house with a single-zone hyper-heat mini-split.
Multi-System Coordination in a Large Home
Coordinated repair and replacement across two HVAC systems in a 5,200 sq ft home — one stayed, one needed replacing.
R-22 to R-454B Replacement
An honest replace-vs-repair conversation about a 2008 R-22 AC, and why current refrigerant equipment was the right call.
Overland Park, KS
Right-Sizing for a Tight New Build
A 60% oversized 4-ton AC in a tight new-build south Overland Park home was the cause of the clammy-but-cool comfort complaint. The fix was downsizing.
Older-Home Ductwork Rebalance
Another contractor wanted to replace a 6-year-old system; we found the actual problem was undersized ductwork and saved the homeowner thousands.
Corporate Woods Commercial Tune-Up
Pre-summer commercial HVAC service on a rooftop unit, catching reduced capacity from a fouled coil before peak demand.
Dual-Fuel Heat Pump Conversion
Converting a conventional furnace + AC to a dual-fuel heat pump system with the balance point matched to local utility rates.
Condenser Coil Restoration
A struggling 5-year-old AC didn’t need refrigerant or repair — it needed a coil cleaning after cottonwood season.
Prairie Village, KS
Mid-Century Ranch Furnace Replacement
Fitting a current-generation right-sized furnace into a 1956 Prairie Village ranch’s original basement mechanical footprint.
Cape Cod Second-Floor Cooling Fix
Solving a hot upstairs in a 1950s Cape Cod with airflow rebalancing — without adding a mini-split.
Zoning Retrofit in a Mid-Century Home
Adding a two-zone retrofit to give an addition its own thermostat control, evening out comfort across a mid-century home.
Condensate Water-Damage Prevention
A small ceiling water stain became a preventive job: clearing a clogged drain and adding the float switch that should have been there.
Media Filter Cabinet Upgrade
MERV 13 media cabinet retrofit for a family with documented allergies. A meaningful change, but honest about what filtration can and can’t do.
Mission, KS
Infill Home Ductless Conversion
Designing and installing a 3-zone ductless system in a new infill home that came with no ductwork.
Central vs Ductless: How We Decided
An honest comparison helped a renovating homeowner choose central air with new ductwork over ductless — for reasons that mattered to them.
Johnson Drive Rental Property HVAC
Reliable, simple, no-frills HVAC for a duplex rental near Johnson Drive. Built for tenants, built to last.
Small-Home Right-Sizing
A 1,100 sq ft Mission home didn’t need a 2.5-ton AC; it needed 1.5 tons properly sized. The fix was smaller, not bigger.
Tune-Up Catches a Weak Capacitor
A routine spring tune-up found a capacitor trending toward failure. Preventive replacement that avoided a summer breakdown.
Merriam, KS
Honest Repair, Not Replacement
Another contractor quoted $4,800 for a full furnace replacement. The real diagnosis was a $310 repair on a healthy 11-year-old furnace.
Flame Sensor Cleaning Restores Heat
A ‘furnace won’t stay lit’ call solved with a 20-minute flame sensor cleaning. The most common fall HVAC repair, done right.
Capacitor Replacement Before Summer Heat
Spring tune-up caught a borderline capacitor. Preventive replacement spared the homeowner a July emergency call.
Bigger Isn’t Better Case
An always-humid Merriam home was running an oversized 4-ton AC on 1,800 sq ft. The counterintuitive fix was downsizing to 2.5 tons.
Budget-Friendly System Replacement
An honest budget conversation produced a right-sized, reliable mid-tier system that fit the family’s finances without compromise on the basics.
Lenexa, KS
Old Town Historic Home Retrofit
Carefully retrofitting modern hyper-heat ductless HVAC into a 1920s Old Town Lenexa home without harming its historic character.
City Center New Build with Zoning
Retrofitting two-zone controls onto a 2024 west Lenexa home to fix temperature gradients between main and upper floors.
Large-Home Multi-Zone HVAC
Designing a coordinated multi-system, multi-zone HVAC solution for a 4,800 sq ft west Lenexa home with three thermal zones.
Attic Air Handler Float-Switch Save
What happens when an attic air handler’s condensate drain clogs and there’s no float switch — and why every air handler should have one.
Spring Allergy IAQ Upgrade
Honest IAQ planning for a family with documented allergies: filtration, humidity control, and saying no to oversold add-ons.
What These Case Studies Have in Common
Every job we publish here was diagnosed with instruments — meters, gauges, manometers, combustion analyzers — not guesswork. Every recommendation was driven by what the measurements showed, not by what was easiest to sell. And every outcome was verified with follow-up measurements after the work was completed.
If your situation looks like one of these, that’s useful context — but every home is different. The right answer for your home depends on what we find when we measure your system. Contact us or call (913) 354-6552 to schedule a diagnostic visit.
Frequently Asked Questions
- Are these real jobs?
- Yes. Each case study is based on actual work 7th Degree performed in the Johnson County metro. Specific customer names, addresses, and identifying details have been generalized or removed to protect privacy, but the technical situations, diagnoses, and outcomes are real.
- Why don’t you publish customer names?
- Privacy. HVAC work happens inside people’s homes, and most customers prefer not to have their address or family circumstances published on the internet. We share enough technical detail to be useful to readers facing similar situations without identifying anyone.
- Can you do this kind of work in my home?
- Probably — if you’re in our service area (Leawood, Overland Park, Prairie Village, Mission, Merriam, or Lenexa) and your situation is within the scope of HVAC equipment we install and service. The first step is a diagnostic visit so we can see what’s actually happening in your system before recommending anything.
- How much did the jobs in these case studies cost?
- We don’t publish pricing in case studies because pricing varies significantly by equipment selection, scope, and current market conditions. We provide written quotes after diagnosis, and we’ll walk through line items with you before any work begins.
- Do you handle commercial cases too?
- Yes — one of the Overland Park case studies is a Corporate Woods commercial rooftop unit. We service light commercial HVAC across the south metro. Learn more about commercial services.
Contact 7th Degree Heating and Air
Your local Leawood HVAC team, also serving Overland Park, Prairie Village, Mission, 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
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)