Verified Customer Reviews
Verified reviews from homeowners across Duluth, Hermantown, Pike Lake, Cloquet, Two Harbors, Superior, and the surrounding Northland — collected from Google, Birdeye, and the Better Business Bureau.
Tom & Linda H.
“We shopped around and felt fortunate when we hired Kevin. Kevin installed a gas boiler, as an addition, to our Geo Thermal heating system. Our experience was totally positive from start to finish. We highly recommend Design Heating, LLC.”
Gas boiler addition to existing geothermal
Mark R.
· Birdeye
“Great to work with. Very professional and knowledgeable on Geothermal. Was able to diagnose and repair unit quickly and do an annual one over on the machine.”
Geothermal diagnosis and annual service
Sandy K.
· Birdeye
“Great service! From first phone call (handled very professionally) to project complete and follow through they did an outstanding job. I highly recommend these folks!”
Complete heating system installation
Jeremy P.
“Kevin replaced our old oil boiler with a high-efficiency Lochinvar. Heating bills dropped by more than half the first month. He explained everything we needed to know in language we could understand. Workmanship is top-notch.”
Oil-to-gas boiler conversion in Hermantown
Karen W.
“Kevin designed and installed the radiant floor heat for our new build in Pike Lake. Best heat we have ever had. Quiet, even temperature in every room, and the LoopCad layout he produced before install gave us complete confidence.”
Infloor radiant heat — new construction
David & Sue M.
· Birdeye
“Our old furnace finally gave up in the middle of November. Kevin came out the same day, ran a Manual J, and had us back up and running with a properly sized 96% furnace within the week. Honest pricing, no upsells.”
Furnace + AC replacement, Duluth
Anonymous
· BBB
“Kevin designed our entire geothermal system from the ground loops to the indoor air handler. CGD certification was a big factor in our choice and it showed in the quality of the work.”
Geothermal system installation, Two Harbors
Ron K.
“We added a heated workshop onto our home and Kevin designed a panel radiator zone tied into our existing boiler. Quiet, doesn't take up floor space, and warms up fast. Will use him again.”
Panel radiator zone addition, Superior WI
Patricia L.
· Birdeye
“Kevin has done our annual boiler service for three years running. Always on time, always thorough, never tries to sell us something we don't need. Real professional.”
Annual boiler service, Duluth
Greg T.
“Our old hydronic system was a mess of mismatched parts from previous contractors. Kevin redesigned the entire piping layout, replaced the mixing valves, and now every zone actually holds temperature. Worth every penny.”
Hydronic system redesign, Cloquet
Cathy N.
“We added a ductless mini-split for our finished basement and it has been perfect. Kevin sized it correctly (not the biggest one available) and the bedroom upstairs is now usable in summer too thanks to better airflow.”
Mini-split installation, Carlton
Bob & Janet S.
· Birdeye
“Kevin installed our new condensing boiler with an indirect water heater. Hot water is endless, heating is more efficient than ever, and the install is so clean it looks like factory work. Highly recommended.”
High-efficiency boiler + indirect water heater, Hermantown
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