Lennox SLP99 Furnace Install in a Basement Utility Space

When a furnace reaches the end of its life, replacing it isn't just about swapping out equipment - it's about getting everything right the first time. The Lennox SLP99 is one of the best variable-capacity furnaces on the market, and an install like this takes real planning to pull off cleanly.

Here's what we were working with - a basement utility area with existing ductwork, gas lines, and drainage all competing for space. That's a pretty typical setup, and it's exactly where cutting corners gets homeowners into trouble down the road. We take our time routing the PVC condensate lines properly and making sure every connection is solid before anything gets buttoned up.

The SLP99 runs at up to 99% AFUE efficiency. That number matters because most older furnaces run somewhere in the 80% range - meaning a significant chunk of the gas you're paying for is just venting out of the house. Upgrading to a unit like this can make a real dent in monthly heating costs, and the variable-speed operation means it adjusts output based on what the home actually needs rather than just blasting on full power.

We also made sure the service record documentation was posted right at the unit. It's a small thing, but it matters. Any tech who comes out in the future - whether for routine maintenance or a repair - can see exactly what was installed and when. That kind of organization saves time and headaches for everyone.

A furnace installation done right should last 15 to 20 years with proper maintenance. We don't rush the work because we know what's riding on it - your comfort, your energy bills, and the safety of your home.