Michael Carter

About Me

I've spent the last twelve years walking through attics, crawling under houses, and staring at gas bills that made homeowners' eyes widen. My job — the one I trained for and continue to refine every year — is to figure out exactly where their money is going when they heat and cool their homes, and then show them how to keep more of it in their pockets.

I split my time between Texas, where summer temperatures push past 105°F (40°C) and air conditioning isn't a luxury but a survival requirement, and Ontario, Canada, where January mornings hit -20°F (-29°C) and a failing furnace means frozen pipes within hours. These two climates represent opposite ends of the HVAC spectrum, and between them I've seen virtually every heating and cooling scenario a residential property can throw at a homeowner.

My approach is data-driven. I don't guess about energy waste — I measure it. Every home I audit gets a blower door test, a duct leakage assessment, infrared thermography of the building envelope, and a full utility bill analysis going back 12-24 months. The numbers tell a story that visual inspection alone can't reveal. A homeowner in Houston once insisted her AC was "too big for the house" because it ran constantly. The blower door test showed 3,800 CFM50 of air leakage — equivalent to leaving a standard door wide open — and thermal imaging revealed the attic insulation had been compressed to R-8 by decades of moisture and settling. The AC wasn't oversized. The house was hemorrhoring conditioned air through a dozen unsealed penetrations.

This is the kind of specificity I bring to every article on HVAC Cost Guide. When I write that sealing ductwork saves 10-20% on heating bills, I'm not quoting a manufacturer's brochure. I'm reporting the average result from 47 homes where I measured duct leakage before and after mastic sealing, tracked utility bills for three months, and controlled for weather variation using heating and cooling degree day normalization.

Career & Experience

How I Write These Guides

Every article on this site is built from actual field data — not manufacturer specifications, not government averages, not hypothetical scenarios. Here's my process:

1. Real utility bills, not estimates. I work from actual 12-24 month utility billing histories. I separate HVAC energy consumption from baseline loads (lighting, appliances, water heating) using degree day analysis and appliance-level metering. When I tell you a 3-ton SEER 16 AC costs $120/month in Dallas, that number comes from homes where I measured it, not from a calculator that assumes perfect conditions.

2. Diagnostics before recommendations. Before I suggest any improvement, I run the diagnostics: blower door test (ASTM E779), duct leakage test (ASTM E1554), infrared thermography, and combustion analysis for gas-fired equipment. This means my recommendations are grounded in measured performance, not assumptions about how well a home should perform.

3. Before-and-after tracking. The savings numbers I publish come from homes where I measured energy consumption before an improvement, verified the improvement was installed correctly, and tracked consumption for at least one full billing cycle afterward. I normalize for weather using heating and cooling degree day data from the nearest weather station so the comparison is fair.

4. Peer-reviewed sources. Where I cite external data, it comes from verifiable government and institutional sources: the Energy Information Administration, the Department of Energy, ENERGY STAR, and Natural Resources Canada. I cross-reference these sources against my field data and note where real-world results differ from published averages.

Climate Zones I Work In

My experience spans two of North America's most demanding residential HVAC markets, plus extensive work across moderate-climate regions. This geographic range gives me perspective that single-region specialists don't have.

Hot-Humid (Texas, Gulf Coast): Cooling dominates energy bills for 6-8 months per year. Summer design temperatures reach 105-110°F (40-43°C). Key challenges: undersized AC units struggling to meet load, poor attic insulation driving ceiling heat gain, duct leakage in unconditioned attics wasting 20-30% of cooled air, humidity control problems from oversized single-stage systems. Homeowners here see AC bills of $150-$350/month in peak summer.

Very Cold (Ontario, Upper Midwest): Heating dominates for 6-7 months. Winter design temperatures drop to -20°F to -30°F (-29°C to -34°C). Key challenges: aging furnaces below 80% AFUE, insufficient insulation in older homes, ice damming from poor attic ventilation, heat pump cold-climate performance limits, propane delivery costs in rural areas. Homeowners here spend $100-$250/month on natural gas or $200-$500/month on propane in peak winter.

Mixed-Hot and Mixed-Cold (Mid-Atlantic, Midwest): Both heating and cooling are significant — 4-5 months of each, plus shoulder seasons. These homes benefit most from comprehensive envelope improvements because every dollar spent on insulation and air sealing reduces both heating AND cooling costs. This is where I see the highest return on investment for combined improvements.

Editorial Standards

Everything published on HVAC Cost Guide meets these standards:

Data accuracy: All cost figures, efficiency ratings, and savings estimates are sourced from either my field measurements (clearly labeled as case studies) or cited government/institutional data with publication dates and URLs. Numbers are updated at least annually to reflect current utility rates and equipment pricing.

Transparency: When a recommendation comes from my personal experience, I say so. When it comes from published research, I cite the source. When there's genuine disagreement among experts (e.g., whether smart thermostats save 10% or 15%), I present the full range of findings rather than picking the number that supports a preferred conclusion.

No paid product placement: I do not accept payment from equipment manufacturers to recommend specific brands. When I mention brand names, it's because they appeared in homes I audited or because they hold verifiable market leadership in a category documented by industry sources. Affiliate relationships, if any, are disclosed clearly on individual pages.

Regular updates: Energy prices, equipment efficiency standards, and tax credit programs change. Articles are reviewed and updated at least once per year, with the modification date displayed prominently at the top of each page.

All Articles by Michael Carter

Browse all guides and calculators on HVAC Cost Guide: