We’re Ponderosa Heating & Air Conditioning, and Arvada is the one city we serve that hands us its own design numbers. The City of Arvada publishes a Manual J design sheet. It lists a 1 °F winter design temperature, 91 °F in summer, 5,453 feet of elevation east of Highway 93, and an altitude correction factor of 0.832. Every furnace and air conditioner in Arvada should be sized against those numbers. Ours are.
Arvada is also the widest spread of housing on our list. The Stocke Addition off Olde Town was platted in 1904. The median Candelas home was built in 2017. Same city, same permit office, 113 years apart, and the equipment in those two basements has almost nothing in common. Our metro crew covers all of it from the Golden shop with the full menu: heating, cooling, water heaters, gas fireplaces, standby generators, electrical and plumbing.
Ponderosa Heating & Air Conditioning provides furnace, boiler, water heater, air conditioning, evaporative cooler, gas fireplace, generator, electrical and plumbing service in Arvada, Colorado (ZIPs 80002, 80003, 80004, 80005 and 80007) from its Golden shop. Equipment is sized to the City of Arvada’s published Manual J criteria, and permits go through Arvada Building Services. Arvada at a glance:
1 °F / 91 °Fwinter and summer design temps on the City of Arvada’s Manual J sheet
5,453 ftdesign elevation east of Hwy 93; Olde Town ~5,370, Candelas ~5,980
0.832the city’s altitude correction factor; ~86,000 BTU from a 100,000 BTU furnace
1979median year built (ACS 2019–2023); 49,766 households, 75% owner-occupied
1904 → 2017Stocke Addition platted to Candelas median year built
2 counties121,510 residents in Jefferson County, 2,892 in Adams (2020)
2024 codeswith the 2026 NEC, Colorado LECC and the Arvada Wildfire Resiliency Code
Full menuHVAC, generators, electrical & plumbing from Golden
Most cities leave load calculations to the contractor’s judgment. Arvada doesn’t. Its Building Services page lists the Manual J design criteria for the city. Winter design temperature: 1 °F at the 99% level. Summer: 91 °F at the 1% level. Indoor design: 70 °F, for a 69 °F heating temperature difference. Design wind: 15 mph in winter, 7.5 mph in summer. Design elevation: 5,453 feet for everything east of Highway 93. West of 93 the sheet just says “varies,” because the ground climbs toward the foothills there.
The number people miss is the altitude correction factor, 0.832. Air at 5,453 feet is about 17% thinner than at sea level, and that factor is how a Manual J corrects the capacity and airflow of the equipment. Gas furnaces carry a second, separate correction. Manufacturers hold the input rating to 2,000 feet and take 4% off for every 1,000 feet above that. So a 100,000 BTU furnace delivers about 86,000 BTU at the city’s design elevation, and about 84,000 up in Candelas. A quote that ignores both corrections is sizing for Kansas.
Arvada straddles the Jefferson–Adams county line. The 2020 census put 121,510 Arvada residents in Jefferson County and 2,892 in Adams, most of them on the northeast edge. Inside city limits the county doesn’t matter for your furnace. Arvada is a home-rule city, and Arvada Building Services issues the mechanical permit on either side of the line. Outside city limits it’s a different story. An unincorporated address with an Arvada mailing address gets a Jefferson County or Adams County permit and inspector instead. We check the address against city limits before we quote, because the fee, the inspector and the code edition all follow the permit office.
Arvada’s housing runs in three clear eras, and we walk into a different job in each one.
The oldest is Olde Town and the historic additions around it. The Stocke Addition was platted in 1904 and the Walter subdivision in 1920, and the bungalows and farmhouses there have been through every generation of heating equipment since coal. What’s usually in the basement now is a furnace fitted into a house that was never designed for ducts, with a water heater and a gas line that have been extended a few times. The work is careful and the venting is rarely straightforward.
The middle era is the postwar and 1970s build-out: Allendale, from the late 1950s to the early 1970s; Lake Arbor around its lake in the late 1970s; the ranches and split-levels along Wadsworth and Ralston Road. That’s where the city’s 1979 median sits. These homes are on their second or third furnace, their first central air is aging out, and a 1970s panel is often the limiting factor on anything electric.
The newest era is west Arvada: the Village of Five Parks from 2002, Whisper Creek, Leyden Rock, and Candelas, where the median home was built in 2017 and the community borders the Rocky Flats National Wildlife Refuge. Those houses came with 90-plus-percent furnaces, matched air conditioning and modern venting. They don’t need replacement. They need maintenance, and they need someone honest about that.
The honest thing we can say to west Arvada is this: your equipment is young. A furnace installed in Candelas or Leyden Rock in the 2010s is inside its expected life and often inside its parts warranty. A failed igniter, a bad inducer motor, a cracked condensate trap or a control board is a repair, and a contractor who quotes a replacement for any of those on a ten-year-old furnace is selling, not diagnosing. We’ll fix the part, log the serial number for the warranty claim, and tell you the year replacement starts to make sense. It isn’t this year.
The same goes for the matched air conditioner. New systems ship on A2L refrigerants, and a 2010s R-410A system is not obsolete because of that. Parts and refrigerant for service remain available; the refrigerant change only matters when a whole system is being replaced, and yours doesn’t need to be.
Arvada adopted the 2024 International Building, Residential, Mechanical, Fuel Gas and Plumbing Codes in 2026. With them came Colorado’s Low Energy and Carbon Code, which is built on the 2024 energy code, and the 2026 National Electrical Code. That puts Arvada’s electrical code a full edition ahead of Golden and Lakewood, which are still on the 2023 NEC. The same adoption brought the Arvada Wildfire Resiliency Code, the city’s first, and electric-ready, solar-ready and EV-ready rules for new construction. New single-family homes, duplexes and townhomes now need sprinklers. Existing homes, additions and remodels do not.
For a replacement furnace or water heater in an existing house, the change that reaches you is in the fuel gas code. The city now wants combustion air, dilution air and ventilation shown on the permit, not assumed. We run that calculation for every Arvada furnace and water heater we replace. It’s a good habit anyway. A starved appliance in a tight 1970s basement gets misdiagnosed as an ignition problem more often than you’d think.
Arvada Building Services is at 8101 Ralston Road, 720-898-7620. The city no longer processes permits over the counter; applications go through its eTRAKiT permits site or by email. Inspections can be scheduled until 6 a.m. on the day you want them, through eTRAKiT or by texting “schedule” to the city’s inspection line, and they run Monday to Friday, 8 a.m. to 4 p.m. In practice that means a furnace we set on a Tuesday is booked for inspection Tuesday night and inspected Wednesday. We handle the permit and the booking as part of the job.
The city’s design sheet draws a line at Highway 93. East of it, the design wind speed is 136 mph and the elevation is 5,453 feet. West of it, the wind speed is 150 mph and the elevation “varies,” and the wildland-urban interface map the city is drawing from Jefferson County’s covers the foothill edge. Candelas sits near 5,980 feet on the flank of the mesa, Leyden Rock near 5,750, against roughly 5,370 in Olde Town. That 600-foot spread is a few percent of furnace output and a real difference in how a condenser pad or a rooftop cooler is anchored. On the west edge, where a house backs onto the refuge grassland, a re-terminated vent gets an ember-resistant cap, the same way we’d do it in the foothills.
Since January 1, 2026, new furnaces and water heaters sold in Colorado have had to meet CDPHE’s NOx limit under HB23-1161. For Arvada’s older stock that means the replacement list is shorter than it was. For Candelas it means almost nothing, because the equipment there isn’t due.
Arvada is a metro address, so the whole list applies. The HVAC crew handles furnaces, boilers, water heaters, air conditioning, evaporative coolers, mini-splits and gas fireplaces. The same shop sends the electricians and plumbers. They cover whole-house standby generators, panel and circuit work, and plumbing. In the 1970s neighborhoods that’s often the useful pairing: a panel that can carry a condenser circuit, and the condenser.
Furnace repair, furnace replacement and boiler repair, sized to the city’s own design criteria.
AC installation, AC repair, tune-ups, evaporative cooler service and mini-splits.
Repair and installation, tank and tankless, in every era of Arvada house.
Sized, permitted and installed from the Golden shop.
Condenser circuits, panel upgrades and plumbing from the same crew. Ask for a quote.
Boiler work in the historic districts, panel upgrades and generator sizing are quoted after we’ve seen the house. Request a quote and we’ll come up from Golden.
The City of Arvada publishes it: 1 °F for winter and 91 °F for summer, with a design elevation of 5,453 feet east of Highway 93 and an altitude correction factor of 0.832. We run every Arvada Manual J against those numbers.
Neither, if you’re inside city limits. Arvada Building Services issues the permit on both sides of the county line. Only unincorporated addresses with an Arvada mailing address go to the county, and we check which you are before we quote.
Almost certainly not. A 2010s furnace is inside its expected life and usually inside its parts warranty. The failure is a part, we replace the part and file the warranty claim, and we’ll tell you when replacement starts to make sense.
The 2024 International codes, Colorado’s Low Energy and Carbon Code and the 2026 National Electrical Code, all adopted in 2026, plus the Arvada Wildfire Resiliency Code. The 2026 NEC puts Arvada an edition ahead of Golden and Lakewood.
Inspections can be booked until 6 a.m. on the day you want them, through eTRAKiT or by text, and run weekdays from 8 to 4. A furnace set on Tuesday is typically inspected Wednesday.
Yes. Arvada gets everything the Golden shop does: standby generators, panels and circuits, and plumbing, scheduled alongside the HVAC work.
All of it: Olde Town and the Reno Park and Stocke-Walter historic districts, Allendale, Lake Arbor, Scenic Heights, Ralston Valley, Quaker Acres, West Woods, Village of Five Parks, Whisper Creek, Spring Mesa, Leyden Rock and Candelas, on both sides of the county line.
Not just because it’s a swamp cooler. If it’s working, we’ll service it. If it isn’t, or the house has outgrown it, we’ll size a more efficient system to the city’s 91 °F design temperature and tell you what the panel can carry.
Call 720-470-1133 or request a quote online. Tell us the neighborhood and the year the house was built, and we’ll know which of the three mechanical rooms we’re walking into before we leave Golden.
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You may also call us 24/7 at 720-470-1133.
