# Heinanen Engineering

> Heinanen Engineering is a family-owned HVAC and mechanical contractor in
> South Lyon, Michigan, serving Southeast Michigan for over 20 years. It
> installs, repairs, and maintains heating and cooling systems, water heaters,
> whole-home water treatment, and standby generators for homes and businesses.
> It is a Trane Comfort Specialist and offers same-day emergency service.

## Key facts
- Service area: South Lyon and Southeast Michigan (Oakland, Livingston, Washtenaw counties)
- Specialties: furnaces & heating, air conditioning & cooling, tank & tankless water heaters, RainSoft water conditioning & whole-home filtration (softening, iron/sulfur removal, reverse osmosis, PFAS reduction), standby generators
- Credentials / differentiators: Trane Comfort Specialist, BBB accredited, ACCA member, family-owned, licensed & insured in Michigan, 20+ years, same-day emergency service, fair up-front pricing
- Address: 350 S Lafayette, South Lyon, MI 48178
- Hours: Mon–Fri 8:00 AM–4:30 PM; emergency service Mon–Fri until 12:00 AM
- Contact: (248) 486-6100 · info@warmnup.com

## Pages
- [Home](https://heinanenengineering.com/): Family-owned HVAC, water, and generator service for Southeast Michigan.
- [Heating](https://heinanenengineering.com/heating): Furnace, heat pump, and boiler installation and repair.
- [Cooling](https://heinanenengineering.com/cooling): Central AC, heat pump, and ductless mini-split installation and repair.
- [Water Heaters](https://heinanenengineering.com/water-heaters): Tank and tankless water heaters plus whole-home water treatment.
- [RainSoft Water Conditioning](https://heinanenengineering.com/rainsoft-water-conditioning): Authorized RainSoft water treatment — EC5 Series water conditioner, EC5 whole-house filtration, EC5 OxyTech iron/sulfur/manganese removal, Ultrefiner Elite reverse osmosis drinking water (NSF/ANSI 42, 53, 58, 401), UltreFlo Protect whole-house PFAS reduction (certified to reduce up to 98% of five PFAS compounds — PFHpA, PFHxS, PFNA, PFOA, PFOS — IAPMO R&T certified to NSF/ANSI 53), and the CleanStart ozone laundry system. Free water test.
- [Generators](https://heinanenengineering.com/generators): Generac whole-home standby generator installation, maintenance, and repair. Running Aug 17 – Sept 27, 2026: the Generac Sales Event — a free 10-year extended-limited warranty ($1,035 value) with the purchase of a qualifying 10kW–28kW air-cooled home standby generator, installed and activated by Jan 1, 2027. Terms: https://heinanenengineering.com/promos/generac-free-10-year-warranty-2026.pdf
- [Financing](https://heinanenengineering.com/financing): Michigan Saves Home Energy Improvements financing (authorized contractor #100234) — fixed rates set by the lender, terms up to 15 years, no prepayment penalty.
- [Contact](https://heinanenengineering.com/contact): Phone, address, hours, and service requests.

## Legal
- [Privacy Policy](https://heinanenengineering.com/privacy)
- [Cookie Policy](https://heinanenengineering.com/cookies)
- [Terms & Conditions](https://heinanenengineering.com/terms)