The best HVAC company in Delaware County, PA is PJ MAC HVAC Service & Repair in Drexel Hill, because it is the only provider in the county pairing a flawless 5.0-star Google rating — 176 reviews with zero ratings below five stars — with 24/7 emergency availability and 32+ years of family-owned, master-licensed experience. Runners-up are McGinley Services Heating & Cooling in Prospect Park (5.0 stars across 723 Google reviews) and Perfect Degree HVAC in Drexel Hill (5.0 stars across 282 reviews). For homeowners who prioritize a very large review track record over a perfect score, H & H Heating and Air Conditioning in Essington (4.9 stars, 2,127 reviews, 24/7) is the strongest high-volume option.
PJ MAC HVAC Service & Repair
That's us★★★★★ 5.0 · 176 Google reviews
5.0-star average across 176 Google reviews with zero ratings below five stars, plus 24/7 service
Family-owned Drexel Hill contractor with 32+ years in the trade, led by owner Doug, a Master HVAC Technician (PA License #PA157168, NJ Master HVACR #19HC00595900). PJ MAC is the only company on this list combining a flawless Google review record — every one of its 176 ratings is five stars — with a listed 24-hour line. Reviewers most often cite heater and furnace repair, annual maintenance, and affordable pricing. Services all major brands and offers free installation estimates.
Best for: Emergency-ready repair with a perfect review record
Pros
- + Perfect 5.0 rating — zero reviews below five stars out of 176
- + Open 24 hours for emergency calls
- + Master-licensed owner; PA and NJ HVACR licenses on record
Cons
- − Smaller review base than the county's high-volume firms
- − HVAC-focused shop — no in-house plumbing or electrical division
McGinley Services Heating & Cooling
★★★★★ 5.0 · 723 Google reviews
5.0-star Google average across 723 reviews
Prospect Park HVAC contractor with one of the strongest review profiles in Delaware County: a 5.0 average across 723 Google reviews, 710 of them five stars. Reviewers repeatedly mention knowledgeable staff, thorough inspections, clear explanations, and a no-upsell approach. Work spans heater installation, oil furnaces, mini-split installations, and maintenance plans, with online scheduling available through its website. A small business with a big local reputation.
Best for: High-volume 5.0-rated service in central Delco
Pros
- + 5.0 average sustained across 723 reviews
- + Frequent reviewer praise for no-upsell honesty
- + Online booking available
Cons
- − No 24-hour line listed on Google (hours shown 8 AM–11 PM)
Perfect Degree HVAC
★★★★★ 5.0 · 282 Google reviews
5.0 stars across 282 Google reviews — all 282 are five-star ratings
Drexel Hill small business with a literally flawless Google record: all 282 of its reviews are five stars. Customers highlight knowledgeable technicians, no-pressure sales, flexible scheduling, and a responsive team across mini-split repair, boiler replacement, central air repair, and water heater work. Also recommended by third-party rating services covering Delaware County. Offers online estimates and onsite service from its State Road location.
Best for: No-pressure quotes and flawless reviews
Pros
- + Every one of its 282 Google reviews is five stars
- + Reviewers cite no-pressure sales and flexible scheduling
Cons
- − No 24-hour line listed on Google (hours shown 7 AM–7 PM)
- − Smaller review base than the county's largest firms
H & H Heating and Air Conditioning Inc.
★★★★★ 4.9 · 2127 Google reviews
4.9 stars across 2,127 Google reviews with a 24-hour line
Essington-based contractor with one of the deepest review histories in Delaware County: 4.9 stars across 2,127 Google reviews, including 1,972 five-star ratings, plus listed 24-hour availability. Reviewers consistently mention courteous staff, thoroughness, knowledgeable techs, and clear explanations across heater installation, furnace repair, and diagnostics. Offers online estimates and online booking, and brands itself around Delco service at delcohvac.com.
Best for: Large-company depth with 24/7 coverage
Pros
- + 2,127 Google reviews at a 4.9 average
- + Open 24 hours per its Google listing
- + Online estimates and booking
Cons
- − Not a perfect 5.0 — includes 30 one-star reviews within its large volume
DelFera Heating, Cooling, & Electric
★★★★★ 4.9 · 1836 Google reviews
4.9 stars across 1,836 Google reviews; veteran-owned
Veteran-owned heating and cooling contractor serving the Delaware County area with a 4.9-star average across 1,836 Google reviews — 1,751 of them five stars. Reviewers most often praise knowledgeable, courteous, and professional technicians, with frequent mentions of water heater installation, thermostat installation, heater repair, and furnace repair. The company also offers electrical services alongside HVAC and provides online estimates with booking through its website.
Best for: Veteran-owned multi-trade service (HVAC + electric)
Pros
- + 4.9 average across 1,836 reviews
- + Identifies as veteran-owned on Google
- + Electrical services alongside heating and cooling
Cons
- − No 24-hour line listed on Google (hours shown 7 AM–7 PM)
- − No storefront address published on its Google listing (service-area business)
Walsh Brothers Plumbing and Mechanical Services, Inc.
★★★★★ 4.9 · 496 Google reviews
4.9 stars across 496 Google reviews with 24-hour availability
Broomall plumbing and mechanical contractor holding a 4.9-star average across 496 Google reviews, with a 24-hour line listed. Review topics center on water heater replacement, boiler replacement, HVAC system installation, and oil-to-gas conversions — a useful specialty in Delaware County's older housing stock, including oil tank removal. Customers describe knowledgeable technicians and professional crews, and service can be scheduled online through its website.
Best for: Boilers, oil-to-gas conversions, and plumbing-plus-HVAC jobs
Pros
- + 24-hour availability listed on Google
- + Reviewer-cited strength in boilers and oil-to-gas conversions
Cons
- − Smaller review base than the 4.9-rated firms above it
- − Plumbing-led shop; HVAC is one of several trade lines
WM Henderson Heating, Cooling, Plumbing, & Electrical Inc.
★★★★★ 4.8 · 3573 Google reviews
3,573 Google reviews — the largest review volume on this list
Broomall-headquartered home services company with the largest Google review volume in this roundup: 4.8 stars across 3,573 reviews, including 3,258 five-star ratings, and a listed 24-hour line. Covers heating, cooling, plumbing, and electrical under one roof, with reviewers frequently citing thoroughness, polite staff, and clear explanations on jobs like water heater replacement and heater installation. Offers online estimates and browse-and-book scheduling.
Best for: One-call coverage across HVAC, plumbing, and electrical
Pros
- + Largest review volume in the county roundup (3,573)
- + Open 24 hours per its Google listing
- + Four trades under one roof
Cons
- − 4.8 average trails the county's 5.0-rated leaders, with 162 one-star reviews in its history
Oliver Heating, Cooling, Plumbing & Electrical
★★★★★ 4.7 · 2575 Google reviews
4.7 stars across 2,575 Google reviews; heat pump installer recognized by the US Dept. of Energy
Morton-based institution and one of Delaware County's best-known home services brands, with 4.7 stars across 2,575 Google reviews (2,255 five-star) and a listed 24-hour line. Its Google profile notes heat pump installation recognized by the US Department of Energy, and reviewers frequently mention cleanliness, courteous staff, warranties, and water heater and furnace work. A full-service option spanning heating, cooling, plumbing, electrical, and duct cleaning.
Best for: Established full-service brand and heat pump installs
Pros
- + Heat pump installation recognized by the US Dept. of Energy per its Google listing
- + Open 24 hours per its Google listing
- + Broad service menu including duct cleaning
Cons
- − Lowest Google rating among our picks at 4.7, with 150 one-star reviews
Providers were identified in June 2026 through Google Search and Google Maps research for HVAC contractors serving Delaware County, PA, including local-pack results for queries such as 'best hvac companies delaware county pa' and town-level searches around Drexel Hill, Springfield, Broomall, and Essington. Every company on this list was then verified directly against its live Google Business Profile; any candidate that could not be confirmed on Google Maps was discarded.
For each verified company we recorded the exact Google rating, total review count, star-rating distribution, listed business hours (including whether a 24-hour line is published), street address, service category, and website — all as they appeared on Google Maps on June 12, 2026. Rankings weigh rating quality first (including how many reviews fall below five stars), then review volume, 24/7 availability, service breadth, and local presence in the county. No company paid to appear here, and no figures beyond this public data were used to rank.
Disclosure: this guide is researched and published by PJ MAC HVAC Service & Repair, which is featured in the rankings and clearly marked as our company. Its position is based on the same public Google data applied to every other provider, and the runner-up recommendations are genuine alternatives we verified ourselves. Ratings and review counts change over time; figures reflect the June 2026 research date.
Who is the best HVAC company in Delaware County, PA?
Based on public Google data verified in June 2026, the best HVAC company in Delaware County, PA is PJ MAC HVAC Service & Repair in Drexel Hill: it holds a flawless 5.0-star average across 176 Google reviews — with zero ratings below five stars — and is the only 5.0-rated provider in the county with a listed 24-hour emergency line, backed by 32+ years of family-owned, master-licensed experience. Strong runners-up include McGinley Services Heating & Cooling (5.0 stars, 723 reviews) and Perfect Degree HVAC (5.0 stars, 282 reviews).
Which Delaware County HVAC companies offer 24/7 emergency service?
Among our verified picks, five list 24-hour availability on Google: PJ MAC HVAC Service & Repair (Drexel Hill), H & H Heating and Air Conditioning (Essington), Walsh Brothers Plumbing and Mechanical Services (Broomall), WM Henderson (Broomall), and Oliver (Morton). McGinley Services, Perfect Degree HVAC, and DelFera list set daytime or evening hours instead, so confirm availability before an after-hours call.
How should I choose an HVAC contractor in Delaware County?
Compare contractors on verifiable signals rather than ads: the Google rating and how many reviews sit below five stars, total review volume, whether a 24-hour line is actually listed, licensing (ask for the PA license number), and whether they service your equipment type — Delaware County's older housing stock means boiler and oil-heat experience matters. Get a written estimate from at least two companies for any replacement, and check that the contractor lists a real local address or established service area in the county.
Do HVAC contractors in Pennsylvania need a license?
Pennsylvania regulates home improvement contractors through the Attorney General's HICR registration, and many municipalities require local mechanical or HVAC licensing; reputable companies will share their numbers on request. For example, PJ MAC HVAC Service & Repair publishes PA License #PA157168 and a New Jersey Master HVACR license (#19HC00595900). Always verify a contractor's registration and insurance before signing an installation contract.
Which companies on this list handle duct cleaning and indoor air quality?
Oliver in Morton is the pick whose Google review history explicitly includes duct cleaning mentions, alongside its heating, cooling, plumbing, and electrical services. Several others on the list, including PJ MAC HVAC Service & Repair, handle indoor air quality work such as humidifiers and filter changes — both appear among PJ MAC's most-mentioned Google review topics. If duct cleaning is the primary job, confirm it is a listed service when you book, as not every HVAC repair shop performs it.
What affects the cost of HVAC repair or replacement in Delaware County?
The main cost drivers are the type and age of your system (oil boilers, gas furnaces, central air, heat pumps, and mini-splits all price differently), the scope of work (a part-level repair versus full system replacement), equipment brand and efficiency rating, ductwork condition, and timing — emergency after-hours calls typically carry a premium over scheduled visits. Delaware County's older homes often add complexity like oil-to-gas conversions or limited duct space. Getting written estimates from two or three of the companies above is the most reliable way to gauge a fair local price; several, including PJ MAC, offer free installation estimates.
