Acreage Property Multi-Zone Heating — Hyde Park Rural Property, September 2024

This case study documents a coordinated HVAC project on a 5-acre Hyde Park rural property covering both the main residence (substantial 3,200 sq ft single-story custom home with diverse zones) and a separate 1,200 sq ft outbuilding workshop. The homeowners had been operating with builder-grade single-zone HVAC in the main home (substantial comfort issues) and minimal heating in the outbuilding (limited workshop functionality during winter). The combined project addressed both spaces simultaneously for efficiency and design consistency.

Initial Concern

Homeowner consultation: “Our main home has the typical builder-grade HVAC and it doesn’t handle the house well. The master suite at one end of the house is always different temperature from the great room at the other end. Our 2018 outbuilding workshop has space heaters and that’s not really working — I want to be able to use it year-round for projects. We’d like to do both pieces together if that makes sense.”

Property Context

• Property: 5-acre rural Hyde Park property with main home, separate outbuilding workshop, substantial pasture area; primary residence
• Main home: 3,200 sq ft 3-bedroom 2.5-bath single-story custom home, 2014 construction; substantial linear floor plan with master suite at one end and great room at opposite end (approximately 90 feet apart linearly); central kitchen and family living area between
• Main home equipment: 2014 Carrier 90% AFUE 90 kBTU gas furnace with matched 2014 Carrier 14 SEER 3.5-ton AC; original single-zone configuration; single thermostat in main living area
• Main home comfort issues: Master suite 4–6°F different from thermostat setpoint (cooler in winter, warmer in summer due to distance from equipment and orientation); great room at opposite end 3–5°F different in opposite direction; equipment runs excessively trying to compensate for distribution issues
• Outbuilding: 1,200 sq ft workshop building, 2018 construction; concrete floor, finished walls, electrical service; substantial windows and skylights; intended for craft and hobby projects; currently has two portable electric space heaters (inadequate for winter use)
• Outbuilding equipment: None other than portable space heaters; no HVAC; no insulation in workshop ceiling (substantial heat loss during winter)
• Utility service: Dominion Energy natural gas to main home; separate electrical service to outbuilding; natural gas to outbuilding required new service extension

Design Process

• Initial consultation: July 18, 2024 (substantial scope warranting extended assessment)
• Main home heat loss/gain calculation: Manual J calculation produced design heat loss of 72,500 BTUH at 3°F and design cooling load of 32,500 BTUH at 92°F
• Main home zone planning: Three-zone configuration: Zone 1 (master suite end — master bedroom, master bath, walk-in closet); Zone 2 (central living area — kitchen, family room, dining); Zone 3 (great room end — great room, secondary bedrooms, secondary bath); each zone has distinct comfort needs and distance from central equipment
• Main home equipment selection: Variable-capacity equipment matched to zoning needs — Carrier Infinity 17 SEER variable-capacity AC (4-ton with 30–100% modulation); matched Carrier Infinity 96 modulating gas furnace (80 kBTU input with 35–100% modulation)
• Outbuilding heat loss calculation: Substantial heat loss due to inadequate ceiling insulation (will be addressed before equipment installation) and substantial glazing; design heat loss of 38,500 BTUH at 3°F
• Outbuilding equipment selection: Separate gas furnace appropriate for outbuilding scale — Carrier 95% AFUE 60 kBTU gas furnace with appropriate ductwork serving the workshop space; minimal cooling provision (single 1.5-ton 16 SEER AC for cooling-mode operation during warmer summer days when workshop is occupied)
• Outbuilding insulation requirement: Coordinated with general contractor for ceiling insulation work (R-49 blown cellulose insulation) and air sealing before HVAC installation; substantial improvement in workshop heat retention
• Gas service extension: Dominion Energy service extension to outbuilding (separate utility coordination cost; not included in Velox scope)
• Smart thermostat integration: Carrier Infinity Touch thermostat ecosystem for main home (three zone thermostats coordinated); separate basic thermostat for outbuilding (homeowner preference for simple operation in workshop)

Installation Scope

• Main home equipment replacement — 2014 equipment removed; new variable-capacity equipment installed in existing mechanical location
• Main home zone control installation — central zone control panel; motorized dampers at three zone branch points; zone thermostat installation with appropriate room placement; coordinated wiring through home
• Main home ductwork modifications — balancing dampers at major branch points; minor ductwork sizing modifications for zone-balanced delivery; sealing of accessible ductwork joints
• Main home commissioning — comprehensive testing of zone operation, variable-capacity equipment modulation, distribution verification per zone
• Outbuilding ductwork installation — new ductwork system designed and installed for workshop space; appropriate supply and return distribution; sealed and insulated ductwork installation
• Outbuilding equipment installation — gas furnace in dedicated mechanical area within workshop; outdoor condenser placement for AC; refrigerant lines; condensate drainage; venting
• Outbuilding gas piping — from utility service extension to outbuilding equipment with appropriate sizing; pressure testing per code
• Outbuilding electrical service — coordination with existing electrical service for HVAC equipment circuits; appropriate sizing and overcurrent protection
• Outbuilding combustion safety — sealed combustion venting through sidewall PVC; combustion air intake; appropriate clearances
• Outbuilding commissioning — equipment operation verification; combustion analysis with CO measurement; thermostat configuration
• Hyde Park permit inspection — mechanical, gas piping, and electrical inspections for both buildings; all approved

Cost and Documentation

• Main home Carrier Infinity 17 SEER variable AC equipment: $5,485
• Main home Carrier Infinity 96 modulating furnace equipment: $4,485
• Main home zone control panel, dampers, thermostats: $2,485
• Main home ductwork modifications and installation labor: $3,485
• Outbuilding Carrier 95% AFUE 60 kBTU furnace: $2,485
• Outbuilding Carrier 16 SEER 1.5-ton AC: $1,985
• Outbuilding ductwork design and installation: $2,485
• Outbuilding installation labor (gas, electrical, venting): $1,485
• Hyde Park permit fees: $385
• Sales tax: $1,485
• Total Velox project cost: $25,765 (approximately $24,985 net after coordination credits)
• Excluded but coordinated: Dominion Energy outbuilding service extension (approximately $1,485 paid separately to utility); outbuilding ceiling insulation work (approximately $2,485 by separate contractor)
• Combined project cost: Approximately $28,955 total including utility extension and insulation work
• Payment: Homeowner construction loan for HVAC scope; utility extension and insulation paid directly by homeowner to respective providers
• Documentation: Comprehensive project documentation for both main home and outbuilding scopes

Timeline

• Initial consultation: July 18, 2024
• Detailed proposal delivered: July 26, 2024
• Homeowner authorization: August 2, 2024
• Outbuilding insulation (separate contractor): August 12–14, 2024
• Dominion Energy gas service extension: August 15–28, 2024
• Velox installation work: September 5–9, 2024 (5 days — substantial scope across both buildings)
• Hyde Park permit inspection: September 12, 2024
• Total project duration: 8 weeks from initial consultation to final inspection

Outcome

• Main home temperature uniformity dramatically improved — each zone maintains within 1–2°F of target across substantial linear floor plan; the master-suite-to-great-room temperature variation eliminated
• Main home variable-capacity operation matches actual load effectively; substantial reduction in cycling vs. previous single-stage equipment
• Outbuilding usable year-round — workshop now maintains comfortable temperature for hobby projects during winter (homeowner achieving 65–68°F target during occupied periods; setback to 50°F during unoccupied periods for freeze protection and energy savings)
• Energy efficiency: Combined energy consumption (main home + outbuilding) tracking approximately 15–20% below previous main-home-only operation despite the additional outbuilding heating — the right-sized zoned main home equipment is substantially more efficient than the previous oversized single-zone operation
• Workshop functionality expanded — homeowner now using outbuilding daily for projects during winter (was unusable previously); substantial quality-of-life improvement
• Smart thermostat integration works effectively for main home zoning; outbuilding basic thermostat appropriate for occasional manual setting
• Warranty coverage — 10-year manufacturer parts warranty registered on all equipment; lifetime compressor warranty on variable-capacity AC
• Homeowner satisfaction — substantial positive feedback regarding both main home comfort improvement and outbuilding usability
• Comfort Club enrollment covers annual maintenance for all equipment; coordinated scheduling for both buildings

Reflection on This Case

This case illustrates the practical approach to substantial rural Hyde Park properties with multiple buildings and diverse heating needs: comprehensive evaluation of both buildings together; appropriate zoning for main home complex floor plan; separate equipment for outbuilding (rather than attempting to extend main home ductwork over substantial distance); coordinated insulation work before HVAC installation (substantial heat loss reduction makes equipment sizing more accurate); coordinated utility service extensions. The combined approach was substantially more efficient than separate projects: single design effort, single permit application, coordinated installation, consistent quality across both buildings. The substantial total project cost ($28,955 combined) is genuinely substantial but justified by the scope: complete main home HVAC replacement with zoning, complete outbuilding HVAC installation with associated infrastructure. For other rural Cache Valley properties with similar combinations of main home comfort issues and outbuilding heating needs, this case study illustrates the practical scope. The 5-day on-site installation reflects the substantial scope; for typical subdivision home single-equipment replacement the timing would be substantially shorter. Rural acreage projects warrant the additional planning and installation time to address the specific scope properly. The integration with general contractor for insulation work demonstrates the value of coordinating with other trades when substantial work spans HVAC scope and building scope; we maintain working relationships with several Cache Valley insulation contractors for projects like this.

Related Services and Resources

• Zoned HVAC installation service
• Complete HVAC replacement service
• Commercial and outbuilding HVAC
• Hyde Park general HVAC service
• Comfort Club maintenance plans
• All case studies

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