Case Study: Furnace Replacement Near La Vista Sports Complex Area

This case study documents a planned furnace replacement for a home in the residential area near the La Vista City Centre Sports Complex. The 2008 90% AFUE furnace had reached end-of-life after 16 years of service, with the customer choosing proactive replacement during scheduled maintenance plan service rather than waiting for failure. The two-stage upgrade from single-stage equipment produces substantially improved comfort through longer steady-state operation, particularly valuable during the variable Omaha winter conditions.

Customer Situation

The property is a 2008 two-story home in the residential area near La Vista City Centre Sports Complex, 2,050 sq ft on a 7,800 sq ft lot with attached two-car garage. The customers (couple in their late 40s with one teenage child, both employed in healthcare professions with rotating shift schedules) had purchased the home 4 years ago and enrolled in Standard maintenance plan immediately. The 2008 original Lennox 90% AFUE furnace had been operating well but was approaching end-of-life given equipment age.

Existing equipment:

• 2008 Lennox single-stage 90% AFUE furnace, 80K Btu/hr, 16 years old
• 2008 Lennox 14 SEER R-410A AC, 3 ton, 16 years old, operating but approaching replacement consideration
• Standard programmable thermostat
• Maintenance plan enrolled providing annual tune-up service

October maintenance plan service prompted upgrade discussion:

• Annual fall furnace tune-up identified developing issues: ID motor showing wear; gas valve operation occasionally hesitant; heat exchanger inspection showed substantial scaling but no cracks
• Equipment at 16 years still operating but approaching predictable failure horizons
• Customer working irregular shift schedules made emergency response inconvenient; proactive replacement preferred
• Customer interested in two-stage upgrade for improved comfort (had heard about two-stage benefits from family member with two-stage system)

Diagnostic Assessment and Discussion

Consultation by Mark Tran (Cold-Climate Tech, 5 years) during October maintenance plan visit. Assessment time approximately 90 minutes including detailed equipment evaluation and customer discussion.

Current Equipment Condition

• 2008 Lennox furnace: still functional, no immediate failure imminent
• Combustion analysis: 28 ppm CO (acceptable), proper combustion characteristics
• Heat exchanger: substantial scaling but no visible cracks
• ID motor: bearing wear audible during operation, approaching end-of-life
• Gas valve: occasional hesitation suggesting developing issues
• Realistic remaining useful life: 1-3 heating seasons

Single-Stage vs Two-Stage Upgrade Discussion

Mark Tran presented options:

• Standard tier single-stage replacement — Lennox ML195 95% AFUE single-stage, $4,000 total. Comparable to existing equipment in operational pattern.
• Mid-tier two-stage replacement — Lennox EL296V 96% AFUE two-stage, $4,800 total. Operates at reduced first-stage capacity (approximately 65% of rated) for most heating, switching to full capacity only when needed. Produces longer steady-state cycles, more even heat delivery, reduced cycling.
• Premium tier modulating replacement — Lennox SLP99V 99% AFUE modulating, $6,400 total. Continuously variable capacity, maximum efficiency, smoothest operation. Premium price.

Customer selected mid-tier two-stage based on cost-benefit analysis: meaningful comfort improvement over single-stage at $800 premium, more affordable than premium modulating at $1,600 premium over standard.

AC Coordination Discussion

Discussion addressed whether to replace AC simultaneously since both units were 16 years old:

• AC operating well at current service visit; no immediate failure imminent
• Customer budget consideration: deferring AC replacement allows separate capital event in 2-3 years
• Two-stage furnace can pair with existing AC adequately; matched system replacement provides slightly better integrated operation but not essential
• Customer chose furnace-only replacement now with AC replacement planned within 2-3 years

Equipment Selection

• Lennox EL296V two-stage condensing furnace — 96% AFUE, 70K Btu/hr (right-sized from 80K based on Manual J), two-stage operation with reduced first-stage capacity
• Existing AC retained — 2008 Lennox 14 SEER R-410A AC continues operation with new furnace
• New programmable thermostat with two-stage compatibility — replaced existing standard programmable
• Chimney liner — for orphaned water heater after condensing furnace conversion

Project Execution

Single-day installation completed within 7 hours:

• Morning — Equipment delivery; old furnace removal; chimney liner installation for orphaned water heater; sidewall venting penetration
• Midday — New furnace positioning and installation; gas, electrical, and ductwork connections; condensate management; two-stage thermostat installation
• Afternoon — System startup and commissioning; combustion analysis verification (6 ppm CO with new condensing equipment); two-stage operation testing; customer walkthrough including operation explanation for two-stage thermostat

Results

• Proactive replacement — avoided emergency scenario during cold weather
• Heating efficiency improvement — 96% AFUE vs prior 90% AFUE produces estimated 7% gas consumption reduction
• Two-stage operation benefits — reduced first-stage capacity for most operation produces longer steady-state cycles with more even heat delivery
• Right-sized equipment — 70K Btu/hr matched to actual heating load vs prior 80K Btu/hr
• Combustion safety — 6 ppm CO new vs 28 ppm prior
• Customer comfort improvement — subsequent heating season showed substantial customer satisfaction with two-stage operation, particularly noting more even temperatures and quieter operation
• Federal Section 25C tax credit — $600 (30% × $600 max furnace)

Pricing

Total project cost: $4,800

• Lennox EL296V two-stage condensing furnace (70K Btu): $4,200
• Chimney liner installation: $1,485 (included in package pricing)
• Sidewall venting penetration: $245 (included)
• Condensate pump: $215 (included)
• Two-stage compatible thermostat: $185 (included)
• Installation labor (7 hours): $885 (included)
• Maintenance plan continuation: $0 additional
• Materials and supplies: $185 (included)
• Package pricing for maintenance plan customer at $4,800 total

Net cost after federal tax credit:

• Project cost: $4,800
• Federal Section 25C tax credit: -$600
• Net cost: $4,200

Two-Stage Operation Benefits Observed

Customer feedback during first heating season:

• Reduced first-stage operation handles approximately 75% of heating load during typical Omaha winter conditions
• Second-stage operation engages during cold snaps and recovery from setback
• Longer steady-state cycles produce more even heat distribution; rooms previously experiencing temperature swings show more consistent comfort
• Reduced first-stage capacity is quieter than full-capacity operation
• Particularly valued during evening hours when customers are home; quieter operation during sleep hours appreciated
• Equipment cycling reduced approximately 40% vs prior single-stage operation

Lessons from This Project

• Proactive replacement during maintenance plan service identifies optimal timing before emergency scenarios
• Two-stage furnaces provide meaningful comfort improvement over single-stage at modest cost premium ($800 in this case)
• Furnace-only replacement appropriate when AC retains useful life; allows phased capital planning
• Right-sizing based on Manual J produces better outcomes than maintaining original equipment sizing
• Maintenance plan customer discount produces meaningful pricing advantage on equipment replacement
• Two-stage operation produces equipment cycling reduction extending equipment lifespan

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Contact Omaha Heating and Air Conditioning

For La Vista sports complex area furnace replacement, two-stage upgrade consultation, proactive replacement planning, or maintenance plan customer pricing, call our 24/7 line.

• Emergency Line (24/7): (402) 258-6703
• MUD Gas Emergency: 402-554-7777 (suspected gas leaks)
• 911: for CO detector alarms or fire/smoke situations
• Address: Lake Regency Building, 450 Regency Pkwy #370, Omaha, NE 68114
• Email: info@omahaheatingairconditioning.xyz
• City of Omaha Mechanical Contractor License: #MC-2014-08847
• EPA Section 608 Universal: #608U-2014-227841

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