Do heat pumps actually work in the Philippine heat? Better than anywhere.
The most common question we're asked — and it's backwards. A heat pump harvests heat from the air, and Philippine air is rich fuel: ₱1 of electricity in, about ₱4 of heat out. The physics, the pesos, and the honest limits.
Is R290 propane refrigerant safe? Yes — here's the honest version.
Propane is flammable; we won't pretend otherwise. But the heat pump holds under 1 kg, welded shut, standing outside — your kitchen LPG tank holds 11 kg beside a flame. The amounts, the standards, the track record.
Zero upfront cost heat pumps: how Energy-as-a-Service works
We install it for free; you pay monthly, less than your bill today. That sounds too good — so here's exactly how the model works, what's in the contract, and the honest cases where buying outright beats it.
Britain just hit 35°C in May. The politicians are arguing about air conditioning. They're all missing the point.
The hottest May day in UK history reopened the air-con debate inside twelve hours. Both sides are arguing about a 1990s split-AC technology choice. The real answer for 2026 — a reversible R290 air-to-water heat pump on the full BUS grant, with iZONE smart radiator replacements — does heating, cooling and hot water on one machine. Stuart Cox on the conversation Britain should be having.
Your AC is quietly costing you ₱8,000 a month and leaking forever chemicals
Filipino split aircons run at COP 2.5-3.5, leak F-gas refrigerants into the air of your bedroom for fifteen years, and throw away the waste heat that could make your hot water for free. Hydronic chilled-water cooling using natural refrigerants is the right answer for the tropics. Stuart Cox on the tropical cooling story nobody tells.
The three line items that never appear on your electric utility bill
Most Philippine factories, hotels and hospitals are paying a power-factor surcharge, a demand-charge spike and slow-burn harmonic damage that the utility bill never lists as a line item. Combined exposure: ₱500K–3M per site, per year. Stuart Cox on what a 1-day walkthrough, a 1-week survey or a full RA 11285 audit will find — and what the ₱40K is refunded against.
The 15-minute rule that re-rates your entire power bill
Your demand charge isn't based on monthly kWh. It's set by the single biggest 15-minute spike of the month — one motor start can re-rate the whole month. Stuart Cox on what almost no commercial customer in PH knows about their own bill.
Why bakeries pay for the same kilowatt twice
A commercial bakery heats the proofer and cools the bread at the same time. Today most plants pay for both jobs twice — a chiller dumps usable heat, an electric heater buys it back. The Karnot SHC architecture closes the loop. Combined COP 6–8.
The bill you didn't ask for: ₱85 of every ₱100 is yours to cut
A Filipino financial planner broke her power bill down and got 19 million views. The engineering-honest version for a commercial bill: ₱85 yours to cut, ₱12 floor. Stuart Cox on what each line item costs and which ones move.
The refrigerant in your chiller is in your bloodstream. And it never leaves.
Most HFC refrigerants are PFAS — forever chemicals engineered to never break down. The EU is banning ~10,000 of them. PH always follows EU chemical regulation 6–8 years behind. Stuart Cox on the board-level liability question your CFO isn't asking yet.
For every kWh of useful work, the Philippines burns 2.4 kWh of fuel
The Philippines wastes 1,700 petajoules of energy every year — more than twice the useful output. The waste is the inheritance of an energy system built when the only way to release thermal energy was to set something on fire. Stuart Cox on the only way out.
24 Months to 2028: How the Philippine Energy Crisis Becomes a Political Crisis
The next Filipino voter walks into a polling booth on 8 May 2028 after two years of diesel above ₱100/L, LPG rationed, and brownouts beginning. Stuart Cox on the three bills that define the 20th Congress.
The 21-Mile Problem: Why Your CFO Is About to Revisit Every Fuel-Burning Asset on Your Site
The Strait of Hormuz crisis has changed the payback math on industrial heat pumps. Retrofits that paid back in 30 months now pay back in 8–12. Here’s the next-90-days playbook for facility managers.
Heating Hot Water With a Steam Boiler Is a Terrible Waste of Energy
A steam boiler is the most expensive way to make 70 °C water. Adding a Karnot iHEAT R290 heat pump preheater cuts diesel use by 25% and pays back in under 18 months. Free calculator and Sankey tool inside.
Pinch Analysis Made Simple: Where Heat Pumps Save the Most
No jargon. No PhD required. Learn how pinch analysis finds the exact minimum heating and cooling your process needs — and where a Karnot Heat Pump saves the most money.
Your Steam Boiler Is Not 80% Efficient — The Real Number Might Shock You
Philippine factories are losing millions of pesos in hidden steam losses. Here is exactly where your energy goes — and what modern heat pump technology does instead.
Your Cold Store Is Burning 25-35% of Revenue on Electricity
Three hidden problems — defrost waste, refrigerant leaks, and non-condensable gases — are costing Philippine cold stores millions of pesos. Here is where the money goes.
Your Boiler Is Burning Money: CO2 Heat Pumps + MVR Cut Steam Costs 90%
Combining Karnot iHEAT CO2 heat pumps with Piller MVR turbo-compressors replaces fuel-fired boilers entirely — system COP of 10-15+ on electricity alone.
Your Hot Water System Is Costing You 4x Too Much
Philippine hotels, hospitals, and food factories are paying ₱12-16 per kWh of hot water. A heat pump delivers the same kWh for ₱2.50-3.00. Here are the numbers.
The humidity excursion you didn't see. The product you can no longer ship.
Standard split AC physically cannot hold a tropical warehouse at 22°C / 60% RH. The SHR mismatch story, the post-harvest loss it causes across tobacco / food / grain storage, and the AHU + iSTOR + R290 + solar architecture that fixes it.
You already have heat pumps. The gas inside is the problem.
R410A is on a phasedown clock under DENR DAO 2021-31. Salt air is destroying coastal coils. BOI incentives may apply. Here's the case for R290 replacement now, on capex.
The 10°C Penalty: Why Philippine Hotels Are Bleeding OPEX on Hot Water
Legacy heat pumps top out at 55°C. Legionella safety requires 65°C. That gap costs hundreds of thousands of pesos per year in electric backup.
Breaking the Energy Trilemma: How the Philippines Can Secure Its Energy Future
S&P, ADB, and the World Bank have all downgraded the Philippines. The energy trilemma is breaking apart. Here is how natural refrigerant technology can rebuild it.
PHP 170 Per Litre Diesel: What the Energy Emergency Means for Your Business
EO 110 declared a national energy emergency. Diesel heading to ₱170/L. Here is what facility managers and business owners need to do now.
More articles coming soon
Guides on Scope 1/2/3 emissions, SEC PFRS S2 compliance, solar+heat pump integration, and more.