Knowledge base
Guides that respect your intelligence
No hype, no hand-waving. Plain-English engineering, real 2026 numbers, and honest trade-offs — each guide sourced and dated.
Category filtering activates as the library grows — CMS hookup notes in README.
Solar-VRF 101: How the Pairing Actually Works
Variable refrigerant flow explained without the acronym soup — how it moves heat, why its load curve matches solar production, and the four numbers that decide whether the combination pencils for your building.
12 min read · Updated July 2026 · By the GetVRF editorial team
The 2026 Incentives Guide: What Survived, What Pays, What's Urgent
Post-OBBBA federal reality, the 2027 commercial ITC cliff, and the MD/DC/VA programs still writing checks.
14 min read · Updated July 2026
VRF vs. Traditional HVAC — With and Without Solar
Efficiency, installed cost, space, controls, and 15-year TCO — including the honest cases where the RTU wins.
11 min read · Updated July 2026
SystemsHeat-Recovery VRF: When Simultaneous Heating + Cooling Pays
Three-pipe systems, load diversity math, and the building types where heat recovery shines.
12 min read · Updated July 2026
SolarSizing Solar for an All-Electric HVAC Load
PVWatts workflows, roof constraints, and why 100% offset isn't always the right target.
13 min read · Updated July 2026
For prosThe Contractor's Guide to Selling Solar-VRF
Positioning, objection handling, and proposal templates that win against the like-for-like bid.
11 min read · Updated July 2026
EquipmentR-454B and the 2026 Refrigerant Transition
What A2L refrigerants mean for VRF pricing, permitting, and retrofit planning.
12 min read · Updated July 2026
Case studies
Real buildings, real bills — publishing this fall
We're documenting solar-VRF retrofits across MD, DC, and VA with 12 months of utility data each: an office campus in Montgomery County, a Capitol Hill rowhouse portfolio, and a Richmond retail strip. Before/after bills, incentive paperwork, lessons learned.
- →Measured (not modeled) savings, published with owner permission
- →Full incentive paper trail: what was claimed, what was paid, how long it took
- →What we'd do differently — every project has one
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