★ 5.0-Star Google Rating — Seminole County's Trusted HVAC Company🏠 Serving All of Seminole County — Oviedo, Casselberry, Sanford & More❄️ AC Repair, Installation & Maintenance — Licensed Seminole County ExpertsBackground-Checked Technicians(407) 465-7777 — Same‑Day Service Across Seminole County
★ 5.0-Star Google Rating — Seminole County's Trusted HVAC Company🏠 Serving All of Seminole County — Oviedo, Casselberry, Sanford & More❄️ AC Repair, Installation & Maintenance — Licensed Seminole County ExpertsBackground-Checked Technicians(407) 465-7777 — Same‑Day Service Across Seminole County
AC Repair in Seminole County — 90-Minute Arrival Guarantee or $200 Off Your Repair
The short answer
AC repair across Seminole County: all 309 square miles — Sanford, Lake Mary, Longwood, Winter Springs, Oviedo, Casselberry, Altamonte Springs, plus unincorporated Fern Park, Wekiva Springs, Chuluota and Geneva — within 90 minutes or $200 off your repair, 24/7, no after-hours fees. Flat $89 diagnostic, most repairs $150–$800, new systems $6,900–$15,900. We handle Seminole County’s separate permit and inspection process at no extra charge.
From Sanford to Oviedo, Lake Mary to Casselberry — your Seminole County home deserves HVAC service that shows up fast and gets it right. Lake Monroe and Lake Jesup humidity is punishing your system. We'll be at your door in 90 minutes or you get $200 off. Nearly 500,000 residents trust this county — and our owner has served it for 30+ years.
“Honesty and integrity seem to be in short supply these days but Chris possesses both. He’s gained my trust. He went out of his way to provide me a diagnosis and knew right away what needed to be done. Very grateful to have found him.”
M
Mar V.
★★★★★ Google review · October 2025
“Great guy, amazing service, knowledgeable, came out at 12am (called at 9pm), and reasonably priced. We had a baby shower planned and may not have had AC if it were not for this company. This company truly deserves this 5-star review.”
A
Angela O
★★★★★ Google review · January 2026
“Best service I’ve experienced in a long time! Communication was great throughout the process. Everything was explained to us thoroughly and our service was scheduled and completed promptly. I have no complaints and highly recommend!”
T
Ty Miller
★★★★★ Google review · October 2025
“The reviews you see for Smart Home are absolutely true. Chris came out to my home at 1:30am and replaced my capacitor, had me cooling in 15 min. He didn’t charge any after-hour fees and was at my door in 50 min. I highly recommend.”
G
German Espinosa
★★★★★ Google review · April 2026
“Great communication. Came out to me on a Sunday last minute. This was for a short term rental that was checking in so they realistically saved me hundreds of dollars because I did not to cancel. Will be using them moving forward!”
C
Cecil Thomas
★★★★★ Google review · July 2025
“Same day service that was amazing! Chris came in on a 95-degree day at 9pm the night before my dad was supposed to have surgery to make sure he was comfortable for his recovery. Cannot recommend this company highly enough!”
V
Viviane Ruiz
★★★★★ Google review · January 2026
“Amazing Service!!! Couldn’t be happier! Chris even came out on New Year’s Day to service the unit! I appreciate the easy communication and the trust and reliability of Smart Home Air and Heat! Would recommend every time!”
M
Maria Lee
★★★★★ Google review · June 2026
“Thank you so much!!! You saved the night with your quick response to our AC issue at 11 pm in the evening! You arrived in an hour and fixed the problem quickly!!!! We highly recommend and will use their services again!!”
S
Shane Rooney
★★★★★ Google review · March 2026
“Called on a Sunday and Chris was over in just a few hours. Fixed the problem, was very informative & transparent, and just a good guy to talk to. Highly recommend for anyone looking for ac services”
R
Robbie Strimpel
★★★★★ Google review · April 2026
“Very good professional service. They are very honest and don’t try to overcharge you or sell you services you don’t need. The provide detailed diagnosis and treatment the customer like family.”
E
Efrain Vazquez
★★★★★ Google review · September 2025
“Honesty and integrity seem to be in short supply these days but Chris possesses both. He’s gained my trust. He went out of his way to provide me a diagnosis and knew right away what needed to be done. Very grateful to have found him.”
M
Mar V.
★★★★★ Google review · October 2025
“Great guy, amazing service, knowledgeable, came out at 12am (called at 9pm), and reasonably priced. We had a baby shower planned and may not have had AC if it were not for this company. This company truly deserves this 5-star review.”
A
Angela O
★★★★★ Google review · January 2026
“Best service I’ve experienced in a long time! Communication was great throughout the process. Everything was explained to us thoroughly and our service was scheduled and completed promptly. I have no complaints and highly recommend!”
T
Ty Miller
★★★★★ Google review · October 2025
“The reviews you see for Smart Home are absolutely true. Chris came out to my home at 1:30am and replaced my capacitor, had me cooling in 15 min. He didn’t charge any after-hour fees and was at my door in 50 min. I highly recommend.”
G
German Espinosa
★★★★★ Google review · April 2026
“Great communication. Came out to me on a Sunday last minute. This was for a short term rental that was checking in so they realistically saved me hundreds of dollars because I did not to cancel. Will be using them moving forward!”
C
Cecil Thomas
★★★★★ Google review · July 2025
“Same day service that was amazing! Chris came in on a 95-degree day at 9pm the night before my dad was supposed to have surgery to make sure he was comfortable for his recovery. Cannot recommend this company highly enough!”
V
Viviane Ruiz
★★★★★ Google review · January 2026
“Amazing Service!!! Couldn’t be happier! Chris even came out on New Year’s Day to service the unit! I appreciate the easy communication and the trust and reliability of Smart Home Air and Heat! Would recommend every time!”
M
Maria Lee
★★★★★ Google review · June 2026
“Thank you so much!!! You saved the night with your quick response to our AC issue at 11 pm in the evening! You arrived in an hour and fixed the problem quickly!!!! We highly recommend and will use their services again!!”
S
Shane Rooney
★★★★★ Google review · March 2026
“Called on a Sunday and Chris was over in just a few hours. Fixed the problem, was very informative & transparent, and just a good guy to talk to. Highly recommend for anyone looking for ac services”
R
Robbie Strimpel
★★★★★ Google review · April 2026
“Very good professional service. They are very honest and don’t try to overcharge you or sell you services you don’t need. The provide detailed diagnosis and treatment the customer like family.”
As Seen OnFOX 35 Orlando• ACHR News • HomePros News
Featured in FOX 35 Orlando’s consumer-protection segment on misleading HVAC offers targeting Orlando homeowners online, and covered by ACHR News and HomePros News. The same owner-led team answers every call here.
What HVAC services do you offer across Seminole County?
From a sudden breakdown to a full system upgrade, we offer every HVAC service your Seminole County home needs — all backed by our 90-minute arrival guarantee.
01
24/7 Emergency AC Repair
When your system fails at 2 AM in Sanford, Lake Mary, Casselberry, or anywhere in Seminole County, we answer the phone and dispatch immediately. Available 24/7, 365 days for all Seminole County zip codes.
We perform a Manual J load calculation on every Seminole County home — from 1,200 sq ft Fern Park ranch homes to 5,000+ sq ft Heathrow estates. Proper sizing across this diverse county is critical for efficiency.
Lake Monroe, Lake Jesup, the St. Johns River, and the Wekiva River create massive humidity across Seminole County. Our tune-ups include mold checks, duct inspections, and dehumidification optimization for every home.
When cold fronts sweep through Seminole County, older 1970s–1980s homes with minimal insulation get cold fast. We repair and install heat pumps, furnaces, and electric heaters county-wide.
Seminole County's massive lake systems, rivers, and year-round warmth create persistent mold and IAQ concerns. We offer whole-home dehumidifiers, UV air purification, and professional duct sanitization.
With AC running 8–10 months per year in Seminole County, a smart thermostat is one of the fastest ways to cut energy costs. We install every major brand and include a free WiFi thermostat with new system installs.
⏱ 90‑Minute Arrival Guarantee · $200 If We're Late · 24/7 Including Weekends · Licensed & Insured · Serving All of Seminole County · ⏱ 90‑Minute Arrival Guarantee · $200 If We're Late · 24/7 Including Weekends · Licensed & Insured · Serving All of Seminole County ·
Why Seminole County Trusts Us
Seminole County's HVAC Specialists. From Longwood to Oviedo, We Know Every Zip Code.
Our headquarters is right here on Curry Ford Road in the 32825 zip code. When you call us, you're calling a family business based on Curry Ford Road — not a call center in another state.
⏱
The 90‑Minute Guarantee
No other Seminole County HVAC company makes this promise. If our technician isn't at your door within 90 minutes, we take $200 off your service. We cover all 309 square miles — from Sanford to Oviedo, Lake Mary to Casselberry, and every unincorporated community in between.
$200
Off if we're late.
🔬
Every Decade of Housing
Seminole County's 215,000+ homes span rural Chuluota homesteads to brand-new Heathrow estates. The suburban core — Altamonte Springs, Casselberry, Longwood — is dominated by 1970s–1980s construction with aging ductwork. We handle every era and every system type.
🏠
Truly Local & Family-Owned
Owner Chris Elsis Jr. is a Central Florida native. We're not a franchise. We know the difference between a Fern Park ranch home and a Heathrow estate — and we know what each one needs.
💰
Transparent, Honest Pricing
You'll get a full, written quote before we start any work. No surprise charges. No upselling. Our diagnostic is a flat $89, same price day or night. With 63% of Seminole County homes owner-occupied, we know you're investing in your biggest asset.
🎓
30+ Years of Expertise
Chris has been solving HVAC problems across Seminole County for over 30 years. From R-22 phase-outs on pre-2010 systems to hurricane-hardened condenser installations, we've handled every challenge this county can throw at us.
Seminole County HVAC Cost Guide
What Does AC Repair Typically Cost in Seminole County?
Transparency is one of our core values. Here's a general guide to common HVAC service costs in the Seminole County area. Your actual cost depends on your specific situation — we always provide a written quote before starting work.
Service
Typical Cost Range
What's Included
AC Diagnostic & Inspection
$89 – $150
Applied toward repair
Common AC Repair
$150 – $800
Capacitor, fan motor, refrigerant leak
AC Tune-Up
$89 – $175
Includes coil clean & mold check
New AC System (installed)
$6,900 – $15,900
Load calc, permits, financing available
Duct Cleaning
$300 – $600
Full system cleaning & sanitization
Smart Thermostat Install
$150 – $350
Setup included
* Prices are estimates for the Seminole County area as of 2026. Actual costs depend on system type, home size, and specific conditions. We provide free, no-obligation quotes for all installations.
Seminole County Service Coverage
How fast can you get anywhere in Seminole County?
Our headquarters on Curry Ford Road puts us minutes away from every corner of Seminole County. Here are the communities we serve with our 90-minute arrival guarantee.
Sanford
County seat with 61,000+ residents, Lake Monroe waterfront, and wide housing age range
Altamonte Springs
48,000+ residents with 1960s–1980s ranch homes and heavy lake humidity
Oviedo
40,000+ residents from starter homes to five-acre estates, Lake Jesup humidity
Winter Springs
38,200 residents with 1980s–2000s construction and Tuskawilla corridor
Casselberry
30,000 residents surrounded by 24+ lakes, 1970s–1980s ductwork needs
Lake Mary
Growing city with newer 1990s–2020s homes and corporate corridor HVAC
Longwood
15,300 residents with historic district homes and suburban ranch neighborhoods
Heathrow
Affluent gated community with $600K+ homes demanding premium multi-zone systems
Fern Park
8,000 residents in ranch homes along SR 436 and US 17-92 corridors
Forest City
15,000 residents with 1960s–1970s ranch and Cape Cod homes
Wekiva Springs
Mediterranean-style villas near Wekiwa Springs State Park
Chuluota
Rural community with multi-acre lots, longer duct runs, and well water systems
Frequently Asked Questions
What do Seminole County homeowners ask about AC repair?
We believe in transparency and education. Here are the most common questions we hear from our Seminole County neighbors.
How much does AC repair cost in Seminole County?
AC repair across Seminole County typically costs between $150 and $800 for common issues like capacitor replacement, refrigerant leaks, or fan motor failures. At Smart Home Air and Heat, we provide a transparent quote before any work begins, and our diagnostic is a flat $89, same price 24/7.
Do you serve all of Seminole County, including unincorporated areas?
Yes. We serve all 309 square miles of Seminole County — every incorporated city (Sanford, Altamonte Springs, Oviedo, Winter Springs, Casselberry, Lake Mary, Longwood) and every unincorporated community (Fern Park, Forest City, Wekiva Springs, Chuluota, Geneva, Heathrow). Our 90-minute guarantee covers them all.
My 1970s Seminole County home still has R-22 refrigerant. What should I do?
R-22 (Freon) was phased out of production in 2020. If your pre-2010 system still uses R-22, the remaining supply is extremely expensive — often $100–$200+ per pound. We recommend replacing the entire system with a modern R-410A or R-454B unit. The energy savings alone often justify the upgrade, especially with Seminole County's 8–10 month cooling season.
Why is humidity such a big problem in Seminole County?
Seminole County is surrounded by massive water systems — Lake Monroe, Lake Jesup (one of the largest in Central Florida), the St. Johns River, and the Wekiva River. These bodies of water create persistently high humidity that forces your AC to work overtime on dehumidification. Attic temps hit 140–160°F county-wide, compounding the problem.
How quickly can you get to my Seminole County home?
We guarantee a technician at your door within 90 minutes of your call, or you receive $200 off. This covers all of Seminole County — from Sanford in the north to Casselberry in the south, Chuluota in the east to Forest City in the west. Available 24/7 including nights and holidays.
Do Seminole County permits differ from Orange County for HVAC work?
Yes. Seminole County has its own building department with different permit requirements, inspection schedules, and fee structures than Orange County. We handle all Seminole County HVAC permitting for you — from application to final inspection — at no additional charge.
Should I prepare my Seminole County AC for hurricane season?
Absolutely. Hurricane-force winds can send debris into your outdoor condenser, and power surges during storms can damage your system's electronics. We recommend a surge protector on your HVAC system, trimming vegetation around your condenser, and having a post-storm inspection plan. Our maintenance plans include hurricane-readiness checks.
Do you offer financing for new AC installations in Seminole County?
Yes. We offer flexible financing for homeowners across all of Seminole County. We work with multiple lenders for low monthly payments and promotional 0% APR periods. A new system typically costs $6,900 to $15,900 depending on home size and system type.
A Message From Your Neighbor
"Seminole County is one of the most diverse areas we serve — from rural homesteads in Chuluota to lakefront mansions in Heathrow. What they all have in common is the humidity from these massive lakes and rivers. Our owner has spent 30+ years learning exactly how to keep every type of Seminole County home comfortable, efficient, and mold-free."
Chris Elsis Jr.
Founder, Smart Home Air and Heat
Florida HVAC License · 30+ Years Experience · Central Florida Native
Seminole County — One Number Gets You a Real Tech.
90-minute arrival guarantee or $200 off your repair — that's our Seminole County guarantee.
Smart Home Air and Heat provides AC repair, installation & HVAC maintenance to all Seminole County zip codes including Sanford, Lake Mary, Longwood, Winter Springs, Casselberry, Oviedo.
