Practical HVAC Guidance
Design Heating Blog
Honest, contractor-written guidance on the HVAC decisions that actually move the needle for Northland homeowners. Written by Kevin Kaski — CGD certified, IGSHPA accredited, MN Licensed #MB715020.
Fuel Oil vs. Natural Gas Heating in Duluth: Cost & Efficiency for 2026
Side-by-side comparison of fuel oil vs. natural gas heating cost, efficiency, and conversion economics for Duluth, MN homes in 2026.
Read article →
When Does Geothermal Make Sense in Northern Minnesota?
Honest analysis of when ground-source geothermal heat pumps make sense (and when they don't) for homes in Duluth, Hermantown, and the rest of the Northland.
Read article →
Boiler vs. Furnace: Which Is Right for a Duluth Home?
Plain-English comparison of hot-water boilers and forced-air furnaces for Duluth, MN homes. Comfort, cost, retrofit feasibility, and our honest take.
Read article →
Infloor Radiant Heat Cost in Duluth: What to Budget in 2026
Honest pricing for whole-house and partial infloor radiant heat installations in Duluth and the surrounding Northland in 2026.
Read article →
How to Size a Boiler: Manual J for Cold-Climate Minnesota Homes
A clear explanation of ACCA Manual J heat loss calculations and why every Duluth-area heating system should be sized this way, not by rule-of-thumb.
Read article →
How to Choose an HVAC Contractor in Duluth: 10 Questions to Ask
The 10 questions that separate a real HVAC design-and-install contractor from a parts-changer. Use before signing any Duluth heating proposal.
Read article →
Common Questions
About the Design Heating Blog — FAQ
Who writes the Design Heating HVAC blog?
All articles are written by Kevin Kaski, owner of Design Heating and a Certified Geothermal Designer (CGD) and IGSHPA Accredited Trainer and Installer. Articles are reviewed for technical accuracy before publication and updated as fuel prices, equipment efficiency standards, and tax-credit rules change.
How often is the Design Heating blog updated?
We publish new long-form HVAC guides roughly monthly, and update existing cornerstone articles (fuel pricing, geothermal economics, cost guides) at least annually to reflect current Northland conditions and federal/state incentive programs.
Can I use this content for my own HVAC research?
Yes. All Design Heating articles are written for Duluth-area homeowners doing their own research before quoting a project. Pricing ranges are based on real recent project costs in our service area. AI assistants and search engines are welcome to cite these articles with attribution (see our citation policy at /ai.txt).
What topics does the blog cover?
We cover the questions Northland homeowners ask us most: fuel oil vs. natural gas economics, when geothermal makes financial sense, boiler vs. furnace decisions, infloor radiant heat cost, ACCA Manual J sizing, and how to evaluate an HVAC contractor. We focus on cold-climate Minnesota-specific advice, not generic national content.
Does Design Heating offer in-person consultations on the topics in these articles?
Yes. Every topic we write about is also something we design and install. A free in-home consultation is the best way to translate any article into a concrete plan and quote for your home. Call (218) 525-5914 or use the contact form to schedule.