Question 1

Do you do electrical work, or do you subcontract it?

Accepted Answer

We have a master electrician on staff who handles electrical scope on coordinated HVAC projects, plus we maintain working relationships with several local electrical contractors when electrical scope exceeds our in-house capability. For projects like this case study (heat pump conversion requiring panel upgrade), our master electrician handles the work directly under our coordinated project management. For larger electrical projects (whole-home rewiring, substantial circuit additions, commercial electrical work), we typically coordinate with established electrical contractors as separate scope. Benefits of in-house electrical for coordinated projects: single contractor manages permits across mechanical and electrical scope; labor scheduling integrated across both scopes; consistent customer communication and project management; warranty and post-installation service unified through single contractor; combined billing rather than separate vendor coordination. Why we don't do all electrical work: electrical is specialized field with substantial training and experience requirements that we don't try to replicate beyond HVAC-adjacent scope; specialized projects (home wiring updates, lighting installations, commercial electrical) are better handled by specialized electrical contractors who do that work daily. For HVAC-electrical interface scope (panel upgrades supporting heat pump conversions, dedicated circuit installations for equipment, electrical relocations for equipment moves), in-house capability ensures projects move smoothly without subcontractor coordination delays.

Question 2

What's special about Federal Pacific panels that they need replacement?

Accepted Answer

Federal Pacific Stab-Lok panels have documented safety issues that make replacement strongly recommended even when panels appear to be operating normally. The specific problem: Stab-Lok circuit breakers have higher-than-acceptable rates of failure-to-trip behavior — when a circuit overload occurs, breakers fail to trip and open the circuit, allowing continued current flow through the overloaded wiring. Consequences of failure-to-trip: overheating of wiring (potential fire ignition source); damage to connected equipment; electrocution risk if ground fault occurs without breaker trip protection. Industry response: CPSC investigations starting in 1980s identified failure-to-trip patterns; insurance industry has elevated risk ratings for homes with Federal Pacific panels; many home inspectors flag these panels during real estate transactions; replacement is widely recommended even when panels show no current operational issues. Why panels are still in service: panels installed during 1950s-1980s heyday of Federal Pacific brand; panels continue to function for routine load supply; failure-to-trip issue only manifests during actual fault conditions; some homeowners delay replacement due to cost ($3,500-$8,000 typical for whole-panel replacement plus service entrance work). For this customer: home inspection during 2023 purchase flagged the panel; customer had been planning replacement but hadn't scheduled it; heat pump project created opportunity for combined scope. We strongly recommend Federal Pacific Stab-Lok panel replacement for any home where we encounter them, regardless of whether other electrical work is being done. Other panel brands with similar concerns: Zinsco panels have similar documented failure issues; some early Pushmatic panels have concerns; modern panels from major manufacturers (Square D, Eaton, Siemens, Cutler-Hammer, Bryant) don't have these issues.

Question 3

How disruptive is a 1-day power outage during panel replacement?

Accepted Answer

Manageable with planning but requires customer preparation. Power outage duration for panel replacement: typically 6-10 hours from morning service disconnect through afternoon reconnect; specific timing depends on Ameren coordination, work complexity, and inspection requirements. Customer-side impact during outage: refrigerator and freezer contents at risk if outage extends beyond 4-6 hours (Ice formation in freezer maintains temperature longer than refrigerator); medical equipment requiring electricity needs alternative power source (CPAP, oxygen concentrators, etc.); home heating during cold weather lost (timed for shoulder season to minimize this issue); home cooling during hot weather lost; medical refrigeration (insulin, etc.) needs alternative cooling; electronic device charging needs alternative source; food preparation limited to non-electric methods. Customer preparation strategies: schedule panel replacement during shoulder season (October-November or April-May, like this case study October timing); prepare cooler with ice for refrigerated medications and critical foods; plan family activities outside home for the outage day; arrange alternative location for medical equipment users; have flashlights and battery-powered devices ready for evening hours; plan meals around outage timing (eat out for lunch, restaurant for dinner if work extends into evening); inform neighbors who might be affected by visible work or expect to borrow services. Specific timing for this case study: 7:30 AM service disconnect, 5:30 PM service reconnect (10 hours total); customer arranged to be at work for most of the day; family stayed at father's home for dinner; food in refrigerator coordinated for use day-before and day-after to minimize fresh items during outage. Coordinated scope benefit: doing panel replacement and HVAC work together meant only one day of disruption rather than two separate disruptions if work had been split across two projects.

Question 4

Why not just do electrical service upgrade without the heat pump?

Accepted Answer

Customer absolutely could have done that — and was originally planning to. Electrical service upgrade standalone economics: approximately $7,200-$8,400 for similar scope without HVAC coordination; addresses safety and capacity issues independent of HVAC; not required for ongoing operation of existing equipment. Heat pump conversion standalone economics: approximately $17,200-$19,200 for similar HVAC scope assuming electrical capacity were already adequate; if customer had 200-amp service already, heat pump installation would have been straightforward without electrical work. Combined scope economics: $24,800 ($23,400 net of rebate) for combined project vs. separate sequential projects ($26,400 estimated combined cost for separate projects), savings approximately $1,200-$1,800 through coordinated permits, integrated labor, and unified project management. Customer's specific situation: home inspection flagged Federal Pacific panel as safety concern; equipment was approaching end of service life and replacement coming within 2-3 years; heat pump interest aligned with Ameren rebate availability; doing both projects together made operational sense. For other customers with different situations: customers with adequate electrical service can do heat pump conversion without electrical scope; customers with Federal Pacific panels but no heat pump interest can do electrical upgrade alone (with future heat pump option available); customers needing only HVAC equipment replacement without conversion can replace existing-type equipment without electrical changes. We assess each customer's specific situation during quote development and recommend appropriate scope based on their priorities and home conditions; combined scope makes sense when multiple converging needs align with shared timing benefit, but isn't always the right choice.

Question 5

What's the long-term value of the 200-amp electrical upgrade?

Accepted Answer

Substantial long-term value extending well beyond this heat pump installation. Future electrification capacity: 200-amp service supports comprehensive home electrification including heat pump water heater (typically 30-amp 240V circuit), electric range or induction cooktop (typically 40-50 amp 240V circuit), electric dryer if not already (typically 30 amp 240V circuit), EV charging station (typically 30-50 amp 240V circuit depending on charging speed), additional kitchen and laundry appliances. Solar panel installation compatibility: if customer adds solar panels in future, 200-amp service provides appropriate interconnection capacity for grid-tied solar inverters. Resale value: modernized electrical service with 200-amp capacity and modern brand panel is feature attractive to future buyers, especially given growing electrification trend; homes with adequate electrical capacity sell at modest premium over similar homes with limited electrical capacity. Insurance considerations: removal of Federal Pacific panel reduces home insurance risk rating; some insurers have specific concerns about Federal Pacific panels and may charge premium or limit coverage; replacement typically improves coverage and may modestly reduce premium. Safety: ongoing operational safety improvement from modern panel reduces fire and electrocution risk; safety value not directly monetary but substantial in family welfare terms. Functional benefits: 40-breaker space allows future circuit additions without panel replacement; sub-panels easier to add if needed for finished basement, addition, or workshop; AFCI/GFCI breaker installation easier with modern panel design. For customers considering electrical upgrade without other immediate scope, the long-term value typically justifies the investment even when current electrical needs are modest. We discuss future-state planning during electrical scope quote development so customers can size electrical upgrade for projected needs rather than only current requirements.

Affton Heat Pump Conversion + Electrical Upgrade | Purisync

Affton Heat Pump Conversion with Electrical Upgrade: 1972 Ranch 100A-to-200A Panel

The Home

The Situation

The Equipment Selection

Electrical Service Upgrade Scope (Selected)

Carrier Infinity 24 Cold-Climate Heat Pump (Selected)

Carrier FE4ANB006 Variable-Speed Air Handler with 10kW Resistance Backup

Closet Relocation Consideration (Not Selected)

The Project Scope

Pre-Installation Coordination

Installation Day 1 (October 13, 2025): Electrical Service Upgrade

Installation Day 2 (October 14, 2025): HVAC Equipment Installation Part 1

Installation Day 3 (October 15, 2025): HVAC Equipment Installation Part 2

Installation Day 4 (October 16, 2025): Equipment Commissioning and Verification

Installation Day 5 (October 17, 2025): Finishing Work and Cleanup

Inspections (October 23-24, 2025)

The Pricing

Electrical Service Upgrade ($8,400)

Heat Pump Conversion ($16,400)

Total Project Cost

The Outcome

Electrical Service Benefits

Heat Pump Operation

Energy Performance (Projected)

Customer Feedback

Ongoing Service

Frequently Asked Questions

Contact Purisync Heating and Air

Office Hours

Recent Posts

Recent Comments

QUICK LINKS

CONTACT

Phone number

EMAIL

OFFICE HOUR