Unitherm Insulation Systems

Before you hire Unitherm Insulation Systems

In Texas, HVAC contractors are licensed through the Texas Department of Licensing and Regulation (TDLR), Air Conditioning and Refrigeration Contractors. Ask Unitherm Insulation Systems for its license number and check that it is active and in the business's name on the board's website. Look up the license

• The typical home in Lewisville was built in 1997.
• When replacing a furnace or air conditioner in a home built around 1997, ask for a load calculation (ACCA Manual J) instead of matching the old unit's size: insulation, windows and duct condition change over the decades, and a correctly sized system runs more efficiently.
• With both heating and cooling seasons in Lewisville, a heat pump, which does both, can replace a separate furnace and air conditioner; compare its SEER2 and HSPF2 ratings.

Local data for HVAC contractors in Lewisville · Licensing boards by state · Which jobs need a permit

Sources: state licensing boards, U.S. Census Bureau (ACS) and NOAA climate normals, as shown on the city page.