About Design Heating
Design Heating is a Duluth team of experienced, well-trained HVAC professionals — led by Kevin Kaski, a Certified Geothermal Designer — designing and installing heating and cooling systems across Northeastern Minnesota and Northern Wisconsin since 2016. The people who design your system are the people who install it.
Meet the Owner
Kevin started Design Heating in 2016 with one principle: a heating system should be engineered for the home it sits in — never sized by rule of thumb, never installed by whichever crew happens to be free that week.
Design Heating projects start with a computerized ACCA Manual J heat-loss calculation whenever the job calls for careful sizing. For hydronic systems, Kevin designs tubing layouts in LoopCad and models near-boiler piping before the first parts are ordered. For geothermal, he sizes the ground loop himself using the same software the big engineering firms use.
Then our crew builds it. Design Heating runs its own trained, in-house team — no rotating subcontractors. The people who design and quote your system are the people who install it and service it down the road. Over the years Kevin has grown the company from a one-person shop into a seasoned six-person crew without ever changing that principle.
That is why Design Heating maintains a 4.9-star average across 114 verified reviews.
Meet the Team
Design Heating is an experienced, well-trained six-person team — led by Kevin and built on decades of combined field experience. The same people who design and quote your system are the ones who install and service it.
Owner · Certified Geothermal Designer & Trainer
Founder and lead system designer. CGD-certified and an IGSHPA Accredited Trainer & Installer — the geothermal and hydronic design expertise behind every Design Heating system.
Lead Foreman · HVAC & Licensed Plumber
Leads our installs in the field. Roughly 40 years in the trade and a licensed Minnesota plumber — the mechanical and hydronic know-how that keeps every job clean, code-correct, and built to last.
HVAC Technician
About 25 years of HVAC experience across service and installation — a seasoned troubleshooter who diagnoses the problem fast and fixes it right the first time.
Lead Installer · Ductless Mini-Splits
Our lead installer, with a specialty in ductless cold-climate mini-split systems — clean line sets, tidy head placement, and dialed-in commissioning.
Field Apprentice
Building the trade under the crew's mentorship, with a couple of years of field experience. Full introduction coming soon.
Field Apprentice
Building the trade under the crew's mentorship, with a couple of years of field experience. Full introduction coming soon.
Full bios and photos for the crew are on the way.
Credentials & Trust
The certifications behind every Design Heating project.
Mechanical License #MB715020 · Mechanical contractor in good standing with the State of Minnesota.
Minnesota Plumbing Contractor License PC 715-020 · gas, water, and hydronic piping done in-house, to code.
IGSHPA credential — fewer than a dozen CGD designers serve Northeastern Minnesota.
Kevin is certified to train other geothermal professionals — the highest IGSHPA tier.
Verified ground-loop and heat-pump installation training, current to industry standards.
We size with computerized heat-loss calculations rather than rule-of-thumb — the engineering step most installers skip.
Verified reviews on Google, BBB, and Birdeye. BBB Accredited Business since founding.
Our Story
2008
Kevin earns IGSHPA accreditation as a Geothermal Installer, formally certifying his hands-on experience installing ground-source heat pump systems.
2012
Kevin earns the CGD credential — the most advanced certification IGSHPA offers — qualifying him to design complete geothermal systems in-house.
2013
Kevin is approved as an IGSHPA Accredited Trainer, qualified to teach geothermal installation and design to other professionals — the highest IGSHPA tier.
2016
Kevin Kaski incorporates Design Heating, LLC in Duluth, MN, bringing his geothermal and hydronic design expertise to homeowners across the Twin Ports. Early jobs are residential boiler upgrades and the first in-house geothermal designs around the Duluth-Superior area.
2018
After dozens of successful fuel-oil-to-gas conversions, Design Heating becomes known regionally for high-efficiency condensing boiler installations and custom hydronic system design in LoopCad.
Today
4.9-star average across 114 verified Google, BBB, and Birdeye reviews. Now an experienced, well-trained crew of six — still owner-led, still load-calculated, not guessed.
How We Work
Computerized ACCA Manual J heat-loss analysis of your home — room by room, BTU by BTU.
Custom system design including hydronic piping, LoopCad tubing layouts, manifold sizing, and electrical schematics.
Our trained, in-house crew installs every project with quality components. No subcontractors, no rotating crews.
Every component tested and tuned. Combustion analyzed, refrigerant verified, outdoor reset curves set. Documented for warranty.
What Our Clients Say
“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.”
Verified review via Google
“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.”
Verified review via 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!”
Verified review via Birdeye
Service Area
Design Heating works with homeowners across Northeastern Minnesota and Northwestern Wisconsin — typically within a 30-mile radius of our shop on Washburn Road in Duluth.
Design Heating, LLCFrequently Asked Questions
Design Heating is owned and led by Kevin Kaski, a Duluth-based HVAC designer and Certified Geothermal Designer who founded the company in 2016. Kevin handles system design and works alongside an experienced, well-trained six-person crew that installs and services every project in-house — never subcontracted.
Design Heating, LLC is licensed and bonded in Minnesota under license #MB715020. Owner Kevin Kaski holds the Certified Geothermal Designer (CGD) credential from IGSHPA (International Ground Source Heat Pump Association) and is an IGSHPA Accredited Trainer and Accredited Installer — the highest credentials available in the geothermal industry. He is one of very few CGD-certified designers serving Northeastern Minnesota.
Kevin founded Design Heating in 2016 after years of working in the trade. Since then the company has designed and installed hundreds of hydronic, geothermal, and forced-air systems across the Duluth, MN region. Design Heating maintains a 4.9-star average rating across 114 verified Google, BBB, and Birdeye reviews.
Three things. First, the owner installs every job — you work with Kevin from the first phone call through warranty service. Second, every system is engineered, not guessed: we run an ACCA Manual J heat-loss calculation and design hydronic systems in LoopCad before quoting. Third, we specialize. We focus on high-efficiency boilers, infloor radiant, panel radiators, geothermal, and modern forced-air — rather than trying to be everything to everyone.
We serve homeowners and small commercial clients across Duluth, Hermantown, Proctor, Pike Lake, Cloquet, Esko, Carlton, Two Harbors (Minnesota), and Superior, Wisconsin — generally within a 30-mile radius of our shop at 5131 Washburn Road in Duluth, MN.
After-hours and emergency service is reserved for our Platinum service-plan clients, who receive priority same-day response. Standard business hours are Monday through Friday, 7:00 AM to 7:00 PM, and our phones are answered until 7:00 PM. For other customers with an urgent heating issue during the cold months, we do our best to prioritize same-week appointments.
Free in-home consultation, Manual J heat-loss calculation, and a written, itemized quote — every time.
