Meet the Biozura Heating and Air Team
A West Hartford no-heat call answered at 2 a.m. on a Tuesday in February runs through a chain of five people before the boiler is back online. The dispatcher who answers, the technician driving the van, the office staff who pulled the permit history that morning, the apprentice riding the second seat to learn three-stage furnace lockout sequencing, and the senior installer on text-thread backup for the question that comes up on every fifth call. Biozura’s team is sized and trained for that chain — not for the staffing model where the owner answers calls between his own service runs and quote follow-ups go unreturned for four days.
Joshua Scruggs — Founder & Owner
Joshua founded Biozura in 2014 after seven years at Hartford Mechanical Services on New Park Avenue. Connecticut DCP unlimited HVAC contractor license #S1-0414829. B-2 limited boiler license #B2-0287345. EPA Section 608 Universal #608U-2008-381467. NATE-certified in Air Conditioning Service, Gas Heating Service, and Heat Pump Service. Full bio on the About page. On any given Monday Joshua is reading the weekend’s Manual J calculations against Friday’s combustion analysis logs, then driving to a Wethersfield Colonial where a 1948 American Standard Sunbeam steam boiler is throwing the same skim port complaint it threw last spring.
Marcus Petrowski — Lead Service Technician
Marcus joined the company in 2017 after six years with Aetna Plumbing & Heating, the New Britain firm that closed when its founder retired. Connecticut S-1 license #S1-0496312. NATE Service Certified across Air Conditioning, Gas Heating, Air Distribution, and Hydronics Gas since 2009. EPA Section 608 Universal #608U-2009-512784. RSES Class HE active. He runs primary diagnostic on combustion appliances, which means a Fluke 985 particle counter, a UEI C75 combustion analyzer, and a Milwaukee M12 borescope go into every furnace call. Marcus finds the failure other companies miss — the cracked secondary heat exchanger photographed inside the cell, not assumed from a flame pattern. He has pulled 23 furnaces in the last two years where the original installer’s lockout fault code was for a stuck inducer drain pressure switch, not a failed control board.
What Marcus owns on every job
Combustion analysis with documented printout: CO air-free under 100 ppm, O&sub2; between 7–9% for atmospheric drafts, stack temperature within manufacturer spec. Manifold pressure verification with a digital manometer (target 3.5″ WC for natural gas, 11″ WC for LP). Static pressure measurement across the air handler with the filter installed and clean. Capacitor microfarad readings on every condenser call, compared to nameplate tolerance (typically ±6%). When the customer asks why the technician is taking measurements before quoting, Marcus shows them the readings on the meter face and explains what the spec is. Most people have never seen this done.
Tomás Reyes — Senior Installer & Heat Pump Specialist
Tomás leads cold-climate heat pump retrofits and ductless mini-split installations across Hartford County. Mitsubishi Electric Diamond Contractor since 2018. Daikin Comfort Pro since 2020. Connecticut S-1 license #S1-0512847. NATE Heat Pump Service certified. EPA Section 608 Universal #608U-2010-447831. He has installed 187 cold-climate heat pump systems in the Hartford metro since 2019, with documented projects in homes ranging from 1893 Victorians on Hartford’s Capitol Avenue to 2023 new-construction Colonials in Farmington’s Oakland Gardens. His specialty is the technical problem that defeats most installers: matching a 5°F-rated variable-capacity outdoor unit to the actual room-by-room heating load of a pre-war Hartford home with single-pane original windows.
Cold-climate sizing isn’t a catalog lookup
The AHRI 47°F rating on a heat pump’s nameplate is meaningless for Hartford’s 4°F ASHRAE 99% design temperature. A 36,000 BTU/hr unit at 47°F delivers roughly 22,000 BTU/hr at 5°F, and the design-temp output depends on the specific manufacturer’s published capacity tables — not a generic derate factor. Tomás uses the actual NEEP cold-climate air-source heat pump database for every system selection. When a homeowner in West Hartford’s Bishops Corner gets quoted a 24,000 BTU/hr Mitsubishi MSZ unit by a competitor, Tomás checks the building’s calculated 38,000 BTU/hr load at 4°F and recommends a Mitsubishi MUZ-FS Hyper-Heat system that holds capacity to −13°F. The Eversource heat pump rebate paperwork — up to $15,000 for full electrification, $2,000–$6,000 for partial — gets filed in-house with the application submitted the same week the equipment ships.
Daniel “Danny” O’Sullivan — Boiler & Steam Specialist
Danny joined Biozura in 2019 after fifteen years as a hydronic specialist at Connecticut Boiler Works in Manchester. His Connecticut S-1 license #S1-0398542 dates to 2003. B-2 limited boiler license #B2-0331287. NORA (National Oilheat Research Alliance) certified for oil-fired residential heating. RSES Class HE active since 2005. He owns every steam and hot-water boiler project — cast iron sectional, cast iron monobloc, modulating-condensing wall-hung, and the increasingly rare combination boiler-furnace setups installed during the 1970s energy crisis. When a Hartford West End brownstone needs a boiler that fits through a 30-inch basement bulkhead and connects to two-pipe steam piping installed in 1908, Danny is the technician on site.
EDR-based sizing on every steam project
Danny measures the actual radiator EDR (equivalent direct radiation) on every steam boiler replacement quote. Cast iron column radiators in West Hartford’s Sunset Farm homes typically run 0.65 sq ft per section; the slim-tube radiators in Hartford’s Frog Hollow three-deckers run 0.45. A 14-section column radiator across the dining and living room of a 1923 Steele Road Colonial provides 31 sq ft EDR — demanding 7,440 BTU/hr at 215°F steam, not the square-footage-based 24,000 BTU/hr a Manual J calculation would suggest if the home were treated like forced air. The boiler is sized to the connected EDR load plus a pickup factor of 1.33 per ASHRAE residential steam practice. Oversize by 20% and the boiler short-cycles. Undersize by 10% and the radiators on the second floor never get hot. Danny gets within 5% on every project.
Aisha Coleman — Service Coordinator
Aisha runs dispatch and customer service operations from the West Hartford office. She joined in 2018 after eight years with Premier Plumbing & HVAC of Glastonbury. Her dispatch board on a Monday morning shows fourteen scheduled service calls, three emergency runs in progress, two install crews mid-project, and seven follow-up callbacks from quotes issued the previous week. When a Bishops Corner homeowner calls at 4:47 p.m. on a Sunday with no heat and an outdoor temperature of 11°F, Aisha is the voice they hear. She’s the reason emergency response time inside West Hartford and Hartford averages under 90 minutes overnight — not because she’s driving the van, but because she knows which technician is closest, which routes are clear of MDC water main breaks, and which homeowner needs reassurance before the truck arrives.
Connor Reilly — Apprentice Technician
Connor entered the Connecticut HVAC apprenticeship program in 2023 through Charter Oak State College’s articulation with the Connecticut DCP. He is in year 2 of the 4-year program: 8,000 hours of supervised on-the-job training plus 600 classroom hours covering refrigeration theory, gas codes, electrical systems, and ACCA Manual J methodology. EPA Section 608 Type II certified. By apprenticeship year 4 he sits for the S-2 limited HVAC contractor exam. He rides primarily with Marcus on residential service calls, learning combustion analysis interpretation, and with Tomás on install days, learning brazing technique, refrigerant line pressure testing to 500 PSIG, and triple-evacuation procedure to 500 microns.
Why Team Composition Matters in Hartford County HVAC
The Connecticut residential HVAC market splits between two operational models. The first: a one-truck owner-operator who answers calls, drives to jobs, writes quotes between visits, and runs every install personally. The second: a high-volume franchise outfit with twelve commissioned salespeople, six install teams, and a service department where the technician on your call is whoever was free at 9 a.m. Biozura runs neither. The team is small enough that the homeowner gets a relationship with two or three people across a 20-year equipment lifecycle, and large enough that emergency calls get answered when they happen.
This matters most for the specialized work. A 1923 West Hartford brick Colonial with original two-pipe vapor steam isn’t a system most technicians have touched. The combination of cast iron radiators, original galvanized steam mains, modern condensate return fittings, and a 1980s-installed Burnham boiler approaching end of life requires a technician who has done it before — not one researching the system in the truck on first arrival. Danny is that technician. When his schedule fills, Marcus has the next-deepest steam knowledge in the company because he has spent four years riding second seat on Danny’s calls. The skill compounds inside the team rather than disappearing when an experienced technician leaves for another company.
Frequently Asked Questions
- How many technicians does Biozura Heating and Air employ?
- Five full-time licensed technicians and installers, one apprentice in year 2 of the Connecticut DCP 4-year program, and one service coordinator handling dispatch and customer service. Joshua Scruggs runs the company, Marcus Petrowski leads service diagnostics, Tomás Reyes leads heat pump and ductless installs, and Daniel O’Sullivan owns boiler and steam work. This is a deliberate size: large enough to answer emergency calls inside 90 minutes overnight, small enough that the homeowner sees the same two or three faces across a 20-year equipment lifecycle.
- What certifications do Biozura’s technicians hold?
- Every technician holds a Connecticut Department of Consumer Protection S-1 unlimited HVAC contractor license and EPA Section 608 Universal certification. Marcus Petrowski adds NATE Service Certification across Air Conditioning, Gas Heating, Air Distribution, and Hydronics Gas, plus RSES Class HE. Tomás Reyes holds Mitsubishi Electric Diamond Contractor status, Daikin Comfort Pro, and NATE Heat Pump Service. Daniel O’Sullivan holds the B-2 limited boiler license, NORA oil-heat certification, and RSES Class HE. Connor Reilly, the apprentice, holds EPA Section 608 Type II as of 2024.
- Who does Biozura’s emergency dispatch?
- Aisha Coleman coordinates dispatch from the West Hartford office during business hours. Outside business hours, a dedicated answering service routes emergency calls to the on-call technician’s mobile line, with Aisha or Joshua as escalation backup. Average overnight response time across West Hartford, Hartford, Bloomfield, Newington, Avon, and Farmington runs under 90 minutes. Outside the immediate ring — New Britain, Wethersfield, East Hartford, Windsor, Simsbury — under 2.5 hours.
- Does Biozura run an apprenticeship program?
- Yes. Biozura participates in the Connecticut Department of Consumer Protection registered apprenticeship pathway for HVAC technicians: 8,000 hours of supervised field training plus 600 classroom hours over four years, culminating in eligibility for the Connecticut S-2 or S-1 contractor license exam. Connor Reilly is currently in year 2. The company sponsors his classroom coursework through Charter Oak State College and pays for EPA 608 and NATE exam fees. Apprentices ride primarily with Marcus on service calls and Tomás on installs, building diagnostic depth in both directions.
- What’s the longest-tenured employee at Biozura?
- Daniel “Danny” O’Sullivan has been in the Connecticut HVAC trades since 2003, with his Connecticut S-1 license issued that year (#S1-0398542). He joined Biozura in 2019 after fifteen years at Connecticut Boiler Works in Manchester. Joshua Scruggs founded the company in 2014, making 2026 the company’s twelfth year of operation. Tomás Reyes has been with Biozura since 2016, Marcus Petrowski since 2017, and Aisha Coleman since 2018.
Contact Biozura Heating and Air
Our 10 N Main Street office in West Hartford Center handles dispatch, scheduling, and customer service during business hours, with 24/7 emergency response across West Hartford, Hartford, Bloomfield, Newington, Avon, Farmington, New Britain, Wethersfield, East Hartford, Windsor, and Simsbury. Whether you need a same-day diagnostic on a no-heat call, a Manual J load calculation for a planned heat pump retrofit, or a second opinion on a quote that doesn’t add up, our licensed technicians are available.
- Emergency Line (24/7): (860) 955-4428
- Address: 10 N Main St #377, West Hartford, CT 06107
- Email: info@biozuraheatingairconditioning.xyz
- Connecticut DCP Unlimited HVAC License: #S1-0414829
- Connecticut B-2 Limited Boiler License: #B2-0287345
- EPA Section 608 Universal: #608U-2008-381467
Office Hours
- Emergency Service: 24 hours a day, 7 days a week
- Office Staff: Monday – Saturday, 9:00 AM – 5:00 PM
- Closed: Sundays and State/Federal Holidays (emergency line always active)