Quick answer
Both are licensed, established Puget Sound companies. Brennan has been a Seattle heating and cooling institution since 1987 — nearly four decades of HVAC-first pedigree, now with plumbing and electrical added, at roughly 4.6★ across 2,200+ Google reviews (July 2026). Eco, founded 2012, built all three trades under one roof from the start, carries 4.9★ across 2,300+ Google reviews, publishes its pricing online, and is a PSE Trade Ally Network member for heat pump rebate work.
- Brennan's HVAC track record is among the longest in Seattle — 'Since 1987' is nearly four decades of furnace and heat pump installs (per brennanheating.com).
- Both companies now cover heating & air, plumbing, and electrical; Brennan grew from HVAC outward, Eco was built multi-trade from the start.
- Published review profiles as of July 2026: Brennan ~4.6★ across ~2,200 Google reviews; Eco 4.9★ across 2,300+ — similar volume, different average.
- Brennan publishes an A+ BBB rating and multi-year Angi Super Service Awards; Eco is BBB A+, Google Guaranteed, and a PSE Trade Ally Network member.
- Brennan's footprint reaches Kitsap and Mason counties across the Sound; Eco's runs north from Seattle through Everett to Mount Vernon.
Brennan is one of the names Seattle homeowners have grown up with — if your parents replaced a furnace in the '90s, there's a fair chance a Brennan truck was in the driveway. Comparing Eco and Brennan is really a comparison of two builds: a heating company that added trades over decades, and a company built around all three trades and home energy from day one. Both are worth a bid on the right project.
Eco vs Brennan at a glance
| Eco | Brennan | |
|---|---|---|
| Trades covered | Electrical, plumbing, and heating & air — all three trades under one roof | Heating, cooling, plumbing, electrical, and air quality (per brennanheating.com) |
| In business | Founded 2012 (Seattle) | Since 1987 (per brennanheating.com) |
| Home base & offices | Seattle, Everett, and Mount Vernon offices | Seattle, Lynnwood, and Lakewood offices (per their site) |
| Service area | King, Snohomish, and Skagit counties | King, Snohomish, Pierce, Kitsap, and Mason counties (per their site) |
| Google reviews (as published) | 4.9★ across 2,300+ Google reviews (Seattle location, as of July 2026) | Approx. 4.6★ across ~2,200 Google reviews (third-party listings, July 2026) |
| Workmanship backing | 100% Satisfaction Guarantee | Recognition published: A+ BBB rating, multi-year Angi Super Service Award (per their site) |
| Pricing transparency | Publishes typical installed price ranges online before you ever call | In-home estimates; published price ranges not a site feature we found (July 2026) |
| Utility rebate posture | PSE Trade Ally Network member; handles utility rebate paperwork on qualifying projects | Energy-efficiency emphasis on their site; PSE network status not published — ask them |
| Compliance on installs | Compliance Package Included on qualifying installs — permits, code, inspection | Permit practices not detailed on their site (as of July 2026) |
Services side by side, trade by trade
| Heating & Air | Eco | Brennan |
|---|---|---|
| Furnaces, heat pumps, AC, ductless | Yes — Daikin authorized; heat-pump-led | Yes — the founding trade, since 1987, incl. duct cleaning and air quality |
| Heat pump utility rebates | PSE Trade Ally Network member; paperwork handled on qualifying projects | Network status not published on their site — ask them (PSE has no public directory) |
| Plumbing | Eco | Brennan |
|---|---|---|
| Water heaters, repairs, repipes | Yes — full plumbing division incl. tankless ($6,500–$10,000 typical, published) | Yes — plumbing and water heaters listed (per their site) |
| Sewer & drain / hydro jetting | Yes — incl. commercial hydro jetting | Not highlighted on their site (as of July 2026) |
| Electrical | Eco | Brennan |
|---|---|---|
| Panels, wiring, EV chargers | Yes — published panel pricing; SPAN smart panels; EV charging | Electrical services listed (per their site) |
| Commercial electrical | Yes | Not highlighted on their site (as of July 2026) |
Service lists are from each company's website as of July 2026. 'Not highlighted' means we didn't find it published — it doesn't mean the company can't do it.
Where Brennan stands out
Four decades of HVAC pedigree
Since 1987 is a track record almost no one in the market can match. For a homeowner who wants the company that has installed furnaces and heat pumps in the region across four decades of code cycles and equipment generations, Brennan's history is a genuine, verifiable strength.
Cross-Sound coverage
Brennan publishes service across King, Snohomish, Pierce, Kitsap, and Mason counties, with offices in Seattle, Lynnwood, and Lakewood. If you're on the Kitsap Peninsula or in the South Sound, Brennan covers territory Eco doesn't.
Install-volume infrastructure
A three-office operation built on decades of replacement installs means scheduling capacity and crew depth for straightforward furnace/AC swaps. For a standard like-for-like replacement, that machinery works in your favor.
Where Eco fits best
Whole-home, three-trade projects
When a heat pump conversion also needs a panel upgrade and a water heater decision, Eco quotes and installs all three trades as one project with one crew chain — the kind of scope that otherwise means coordinating multiple bids and schedules.
Rebate-eligible electrification
PSE's heat pump heating rebates require an REP or Trade Ally Network contractor (pse.com, July 2026). Eco is a PSE Trade Ally Network member and handles utility paperwork on qualifying projects — ask any bidder about their network status before signing.
Published pricing and a 4.9★ average
Eco publishes typical installed ranges online for the big-ticket jobs and carries a 4.9★ average across 2,300+ Google reviews (July 2026). If you want to benchmark a bid before the appointment, the numbers are already public.
How to choose between Eco and Brennan
Whichever way you lean, this is how we'd advise a friend to run the decision:
- Get written bids from both companies (and ideally a third) for any significant project — equipment model numbers, scope, permits, and warranty terms in writing, line by line.
- Verify any contractor's license, bond, and insurance at the WA L&I contractor lookup (secure.lni.wa.gov/verify) — both companies here are licensed Washington contractors.
- If your project involves a heat pump or heat pump water heater, ask each bidder how utility rebates will be handled and who files the paperwork. PSE requires a Recommended Energy Professional or Trade Ally Network contractor for its heat pump heating rebates (per pse.com, verified July 2026).
- Read recent reviews on Google for the specific service you need — a company can be excellent at one trade and thinner in another.
- For a straight furnace or AC replacement, Brennan's decades of install volume are a fair reason to include them; for a heat-pump-plus-panel electrification project, weight three-trade coordination and PSE network eligibility more heavily.
- If you're in Kitsap or Mason County, Brennan publishes coverage there and Eco doesn't — geography settles it.
Want Eco's bid for the comparison?
Get an upfront written scope and price — equipment, permits, and the rebates you qualify for, before any work begins. Compare it line by line against anyone.
Continue exploring
Common questions
Is Eco or Brennan better for a heat pump?
Both install heat pumps and both are licensed, established companies. The practical questions: PSE's heat pump rebates require a contractor from its REP/Trade Ally network — Eco is a PSE Trade Ally Network member; ask Brennan about their status since PSE publishes no directory. If the project also touches your electrical panel or water heater, compare how each bidder scopes the whole job. Get bids from both.
Who is cheaper, Eco or Brennan?
It depends on the project — there's no honest blanket answer. Equipment tier, ductwork, electrical scope, and permits move the number more than the company name does. Eco publishes typical installed ranges online (for example, heat pump systems and 200A panel replacements) so you can benchmark; the only real answer is written bids from both.
How long has each company been in business?
Brennan publishes 'Since 1987' — nearly four decades, one of the longest HVAC track records in the region. Eco was founded in 2012 and built electrical, plumbing, and heating & air under one roof from the start. Both are licensed Washington contractors; verify either at the WA L&I lookup.
Do both companies do plumbing and electrical, or just HVAC?
Both cover all three trades as of July 2026. Brennan grew from heating and cooling into plumbing and electrical; Eco has run all three trades from the start, including commercial plumbing and electrical divisions and sewer/drain work, which aren't highlighted on Brennan's site.
Last updated: 2026-07-18
Sources & references
Every competitor fact on this page comes from the public sources below, retrieved July 2026. Review counts and ratings change constantly — check each company's live profiles for current figures.
Brennan (their published information)
- 'Since 1987', trades, counties served, offices, A+ BBB and Angi awards — brennanheating.com (retrieved July 2026)
- Google review figures (~4.6★ / ~2,200 reviews) — third-party directory listings (retrieved July 2026)
Eco & program facts
- Eco 4.9★ / 2,300+ Google reviews (Seattle GBP), verified July 2026 — Eco reviews
- PSE heat pump rebates require an REP or Trade Ally Network contractor — pse.com (verified July 2026)
- Verify any WA contractor license and bond — WA L&I contractor lookup
Competitor information on this page comes from public sources — each company's own website and published review profiles — as of July 2026 and may have changed since; verify current details, licensing, and offers directly with each company. Company names are trademarks of their respective owners. Eco Electric, Plumbing, Heating & Air is not affiliated with, and this page is not endorsed by, any company compared here. Any Washington contractor's license and bond status can be verified at the WA Department of Labor & Industries contractor lookup (secure.lni.wa.gov/verify).