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#1 Independent WaterFurnace Dealer World Wide!

Rehagen HVAC has been proudly serving the entire Central MO area for 30 years, over 23 of which have been devoted to specializing in geothermal.  Rehagen HVAC has well over 2,000 geothermal units installed!  We take a great deal of pride in our work.  It’s a wonderful feeling to be at one of our kid’s ball games or at the grocery store and have a customer pull you aside to tell us about their last months electric bills!  Our company offers an IGSPA certified geoexhange designer, we have obtained certification in Geo Piping Loop Design, Fusion Welding , & with Missouri DNR Well Drillers and Pump Installers, our company is BBB accredited, we are members of the Jefferson City Chamber of Commerce, the Jefferson City HBA and serve as committee members for the HBA Green Built program.

Rehagen Heating and Cooling is a full service sheet metal shop, all of our duct work is custom fabricated in our shop (no ordered, boxed, tin foil pre-fab duct!).  All duct systems are tailor made for your particular home and are fully insulated and sealed.  Rehagen HVAC whole home systems have been vacuum tested and certified with a 45 Hers Index Rating!  (Home Energy Rating System: The energy star requirement index number is 85, the lower the score the better!). Rehagen HVAC systems are currently ranked in the top 10 percentile of  HERS scored in the state of Missouri!  To have your home vacuum tested visit Gary Fries at www.aserusa.com  (see photo of  Welek Construction located in our picture gallery.)

Customer education is also very important to us.  Installing geothermal is a sizable investment.  We want you to have all the information and education possible.  When our customers put their faith and trust in us it is not something we take lightly.  We consider all of our customers to be a part of our extended family!  Our personal cell phone numbers are included in every bid proposal.  Also with every estimate is a free HVAC Home Energy Audit.  Included in that audit will be average monthly savings, your lifetime savings, percentage of return on investment.  You will also receive a Water Furnace DVD, a Geo Journal, information on tax credits and rebates, ARI certificate, all product literature and a Manual J Load Calculation.

Link to 11-9-08  Open House 
WaterFurnace news story
At Rehagen Heating, Cooling and Plumbing our main goal is for our customers to have the lowest possible energy bills.   As the most experienced geothermal dealer in Central MO, we use the latest engineering technology and sizing programs available.  Sizing is crucial!  Mistakes made during the installation process can be a lifetime affair.  If a sizing mistake is made you may never recoup your investment.  We urge you to do your homework when choosing an HVAC contractor (see our "Why Rehagen HVAC" page for a list of info to consider when choosing a dealer).  Be sure to ask for past customer references and make sure your HVAC dealer is fully insured and certified.
Contact us today
Rehagen Heating, Cooling & Plumbing

PO Box 68
2041 Hwy 63 S
Westphalia, MO  65085

(573) 455-2394

(573) 455-2378


Business Hours
Monday - Friday 7:00 AM - 4:30 PM
24 Hour Emergency Service

Rehagen Twin City
California Branch

208 North Prairie St.
California, MO  65018

(573) 796-2311

(573) 796-2680

Rehagen HVAC is honored to be recognized as the # 1 Independent WaterFurnace Dealer World Wide for 3 years!

When the Missouri Botanical Gardens decided to show case the best green products available it was no surprise that WaterFurnace was chosen as the greenest geothermal heating and cooling system.  WaterFurnaces are manufactured at a certified "Green Factory"  nothing goes to the landfill at W.F.I.  To learn more about certified green products recognized by the MO. Botanical Gardens visit http://www.mobot.org/150/green_life/default.asp.